EP0300855A1 - Web with longitudinal reinforcement, its manufacture and its use in packaging methods and device for making such a web - Google Patents

Web with longitudinal reinforcement, its manufacture and its use in packaging methods and device for making such a web Download PDF

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Publication number
EP0300855A1
EP0300855A1 EP88401615A EP88401615A EP0300855A1 EP 0300855 A1 EP0300855 A1 EP 0300855A1 EP 88401615 A EP88401615 A EP 88401615A EP 88401615 A EP88401615 A EP 88401615A EP 0300855 A1 EP0300855 A1 EP 0300855A1
Authority
EP
European Patent Office
Prior art keywords
strip
longitudinal
load
reinforcement
film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88401615A
Other languages
German (de)
French (fr)
Other versions
EP0300855B1 (en
Inventor
Georges Jaconelli
Jean-Paul Charles Martin-Cocher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Newtec International SA
Original Assignee
Newtec International SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Newtec International SA filed Critical Newtec International SA
Publication of EP0300855A1 publication Critical patent/EP0300855A1/en
Application granted granted Critical
Publication of EP0300855B1 publication Critical patent/EP0300855B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B25/00—Packaging other articles presenting special problems
    • B65B25/14—Packaging paper or like sheets, envelopes, or newspapers, in flat, folded, or rolled form
    • B65B25/146—Packaging paper or like sheets, envelopes, or newspapers, in flat, folded, or rolled form packaging rolled-up articles
    • B65B25/148—Jumbo paper rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/04—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material the articles being rotated
    • B65B11/045—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material the articles being rotated by rotating platforms supporting the articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/02—Wrappers or flexible covers
    • B65D65/22—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B2220/00—Specific aspects of the packaging operation
    • B65B2220/12—Creating additional longitudinal welds on horizontal or vertical form fill seal [FFS] machines for stiffening packages or for creating package edges

Definitions

  • the invention relates to a strip with longitudinal reinforcement, its production and its use.
  • the subject of the invention is a strip such as that which is more particularly applicable to the constitution of a package, more especially constituted by a plastic film of the type which has just been produced in one piece with which a reinforcement can be associated as well as 'a method and a device for carrying it out.
  • a subject of the invention is also a method of packaging and a packaging using such a strip; and particular packaging applications of this type, namely on the one hand the packaging of a load of generally cylindrical shape with horizontal axis of revolution such as a paper reel and on the other hand the wrapping of a palletized load.
  • a strip such as that which is concerned comprises at least one longitudinal reinforcement zone constituted, at least in part, by N longitudinal zones of folding of the strip, adjacent to each other, overlapping at least substantially flat, at least for part, one on top of the other, in the same longitudinal region of the strip, N being a positive integer at least equal to two.
  • a package for a load comprises at least one such section of strip in the longitudinal direction. More specifically, this section of strip is applied to the packaged load, so that a longitudinal reinforcement zone of the strip section is located at the place where the packaging is to be reinforced or the advantage load protected or any other desired location.
  • a method of packaging such a load comprises the various stages in which a flexible strip with longitudinal reinforcement is unwound, a relative displacement of the strip is carried out with respect to the load to be packaged so that the strip is applied to the load and the strip is rigidly associated on itself and / or on the load. More specifically, either we start from a strip, devoid of reinforcement and we unwind it to successively carry out, first, continuously, the longitudinal reinforcement then apply the strip thus reinforced to the load; either we start from a strip with longitudinal reinforcement wound in a reel, we unwind it and we apply it to the load.
  • One possible method for continuously producing such a reinforcement on a strip is such that one starts from a single-thickness strip, continuous as a whole, devoid of reinforcement, the strip is scrolled in a longitudinal direction in a relative movement and in at least one longitudinal folding phase, at least two adjacent longitudinal folding zones of the strip to be overlapped flat over one another are progressively brought in longitudinal and transverse directions to form at least one fold longitudinal constituting at least part of the longitudinal reinforcing zone.
  • a device for implementing this method comprises means for continuously feeding a strip without reinforcement, for driving this strip in longitudinal movement and for evacuating the strip with reinforcement; means for keeping the strip tensioned in the longitudinal direction; at least first and second longitudinally extended but limited pads which, in their active state, have their downstream end portions at least partially superimposed and spaced from one another in the direction perpendicular to their plane, having the function of conforming the strip which slides over them so that these superimposed and spaced downstream parts cover the longitudinal folding zones of the strip.
  • a particular case of the packaging process for the packaging application of a paper reel is such that, on the one hand, the load has a generally cylindrical shape, for example, circular, in particular with its axis of revolution placed horizontally, this filler being in particular a reel of paper, and, on the other hand, the film is of the stretchable type; in at least one optional first phase, the strip is unwound without the need for reinforcement thereon and this strip is applied to at least part of the cylindrical surface of the load and, in at least a second phase, it is unwound the strip and a longitudinal reinforcement is produced on it and this strip is applied with reinforcement with its reinforcement to an end edge of the cylindrical surface; at least during the second phase or phases, the film is stretched or pre-stretched, which has the effect of causing the application of this film on the end face or faces of the load; the film strip is cut transversely and its end end part is secured to the load and / or to the intermediate part of the film strip already applied to the load.
  • An installation for implementing this method comprises means for supporting a reel of film strip with a horizontal axis of the motorized support means for the load, capable of allowing it to pivot about its axis of revolution; a device for continuously producing a longitudinal reinforcement zone on the film strip, interposed between the reel support means, respectively the film strip reel itself, and the load support means, respectively the load itself, the film strip passing through this device; means for cross-cutting the film strip; means for securing the film strip to itself and / or to the load; means for ensuring horizontal relative sliding of the device and load support means parallel to the axis of the load; and means for stretching or pre-stretching the film.
  • the packaging process for the wrapping application is such that, on the one hand, the load has a generally parallelepiped shape in particular with its axis placed vertically, this load being in particular a palletized load and, on the other hand, the film is of the stretchable type; in at least one phase, the strip is unwound, a longitudinal reinforcement is produced thereon and this strip is applied with reinforcement to the load and, simultaneously, the film is stretched or pre-stretched.
  • a machine for implementing this method comprises means for supporting a reel of film strip with a vertical axis; load support means; means for effecting relative displacement of the film strip reel support means, respectively of the film strip reel and load support means, respectively of the load, pivotally about a vertical axis; a device for carrying out, continuously, a reinforcement on the film strip, interposed between the support means of the film strip reel, respectively the film strip reel, and the load support means, respectively the charge itself , the strip of film passing in advance through this device; means for cross-cutting the film strip; means for securing the film strip to itself and / or to the load; and means for stretching or pre-stretching the film.
  • the invention is based on the concept of a film strip in which is integrated a homogeneous longitudinal reinforcement comprising one or more longitudinal folds, that is to say one or more superimposed layers or thicknesses of film.
  • a homogeneous longitudinal reinforcement comprising one or more longitudinal folds, that is to say one or more superimposed layers or thicknesses of film.
  • Such a strip can be produced continuously from a conventional strip of the prior art.
  • the location of the reinforcement in the longitudinal direction or in the transverse direction, its transverse extent, its importance (number of superimposed layers), allow numerous variants of embodiment as required.
  • This reinforcement makes it possible to imprison a solid, liquid or gaseous body.
  • the strip and its longitudinal reinforcement form a single unit, inseparable, which distinguishes the strip according to the invention from two layers of strip simply superimposed.
  • the invention firstly relates to a flexible strip 1, more specifically but not exclusively applicable to the constitution of packaging, more especially constituted by a plastic film, of the type which has come from one-piece production.
  • This strip 1 comprises at least one longitudinal reinforcement zone 2 constituted, at least in part, by N longitudinal folding zones 3a, 3b ... 3N of the strip 1, adjacent to each other, overlapping at least substantially flat , at least partly on top of each other, in the same longitudinal region of the strip 1, N being a positive integer at least equal to two (FIG. 2).
  • Such a strip 1 according to the invention can be compared to a strip of the known state of the art according to Figure 1.
  • the strip according to the known state of the art came from a workpiece and has a single thickness over its entire surface, the physical properties of the strip being homogeneous or more or less homogeneous over its entire surface, both longitudinally and transversely. These properties are in particular the thickness, the power of shock absorption, etc.
  • the strip 1 according to the invention comprises a longitudinal reinforcement zone integrated into the strip 1 and produced by the strip 1 itself , due to its longitudinal folding.
  • the strip 1 according to the invention therefore opposes, in this respect, other strips also known from the state of the art in which a reinforcement is attached to the strip.
  • the strip 1 is bounded by two longitudinal edges 4 parallel to the longitudinal axis 5 of the strip 1.
  • transverse direction means a direction perpendicular to the longitudinal axis 5 and in the plane of the strip 1.
  • Strip 1 defines a sheet having two large opposite surfaces respectively 6A and 6B (for example the place and the reverse or the front and back).
  • two (or more) longitudinal folding zones 3A, 3B, which are adjacent to each other at least substantially flat is meant the realization with the strip 1 of a longitudinal fold 7, parallel to the longitudinal axis 5 separating the two zones 3A, 3B also longitudinal in contact by their same surface 6A or 6B or having their same surfaces 6A or 6B facing one another.
  • the longitudinal reinforcement zone comprises two longitudinal folding zones 3A and 3B and a single fold 7 (FIG. 4A).
  • the longitudinal reinforcement zone has three longitudinal folding zones 3A, 3B, 3C superposed and two folds 7A, 7B, spaced transversely from one another (FIG. 3 ).
  • Reinforcement zone 2 is understood to mean the fact that in this zone of strip 1, strip 1 has a greater number of film thicknesses than in the rest of strip 1. It is understood by flat covering that longitudinal folding zones 3A, 3B are applied one on the other or turned towards each other so that the strip 1 retains, despite the presence of the longitudinal reinforcement area, a general shape of flat strip, simply thicker at the location of the reinforcement thus formed.
  • a longitudinal reinforcement zone 2 can be used functionally in many possible ways, either for its strength qualities, or in that it constitutes an additional thickness compared to the rest of the strip 1 having a shock protection function. These and other functions are used to advantage in the various possible applications of such a strip 1 according to the invention.
  • the strip 1 with reinforcement 2 can be the subject of numerous variant embodiments: a longitudinal reinforcement zone 2 is either adjoining or close to the longitudinal edge 4 of the strip 1, or in or near the median longitudinal part of the strip 1, is situated in a lateral part of the strip 1, between its longitudinal axis 5 and a longitudinal edge 4 (respectively FIGS. 4A, 4B, 4C).
  • the strip 1 can comprise either a single longitudinal reinforcement zone 2, or several longitudinal reinforcement zones 2 (respectively FIG. 4B in particular and FIG. 4D or 4E). In the case where there are several longitudinal reinforcement zones 2, these are either adjacent or separated transversely from one another (FIGS. 4E and 4D respectively).
  • the strip 1 is characterized by a symmetrical or substantially symmetrical arrangement of the longitudinal reinforcement zone (s) 2 relative to the median longitudinal axis 5 of the strip 1 (FIGS. 4B, 4D to 4K), by opposition to an asymmetrical arrangement ( Figures 4A, 4C).
  • the strip 1 is characterized by an arrangement of a reinforcement zone 2 which in the longitudinal direction is either continuous or discontinuous, arranged in separate longitudinal sections in particular separated from each other, more or less extended in the longitudinal direction ( Figures 5A and 5B respectively).
  • the strip 1 is characterized by an arrangement of a longitudinal reinforcement zone 2 either elongated or substantially elongated or curvilinear, or extended transversely (respectively FIG. 4F and FIGS. 4, 4A, 4B, 4C).
  • a longitudinal reinforcement zone 2 either elongated or substantially elongated or curvilinear, or extended transversely (respectively FIG. 4F and FIGS. 4, 4A, 4B, 4C).
  • the strip 1 is characterized by an arrangement of a longitudinal reinforcing zone 2 on the strip 1 which is either localized or extended transversely over all or only over part of the transverse width of the strip 1 (respectively Figures 4B and 4G for example).
  • the reinforcement zone 2 occupies only a small part of the strip 1 in the transverse direction.
  • the reinforcement zone 2 can occupy a significant part of the width of the strip 1 or all of this width.
  • the N longitudinal folding zones 3A, 3B, ... 3N constituting the longitudinal reinforcement zone 2 are either of the same transverse width and superimposed while then constituting a longitudinal reinforcement 2 of constant thickness in transverse direction, or offset and / or of different widths, thus constituting a longitudinal reinforcement 2 of variable thickness in the transverse direction (respectively FIGS. 4H and 4I).
  • a reinforcement 2 has a greater thickness in its median longitudinal line and a smaller thickness on its longitudinal edge with, in particular, a thickness decreasing from the median longitudinal line to the longitudinal edge.
  • This structural characteristic of the strip 1 is important and advantageous since it allows the production of a more or less significant longitudinal reinforcement zone 2 depending on the location in the transverse direction.
  • the longitudinal folding zones 3A, 3B ... are joined together in particular by welding 8 (FIG. 4J), this welding 8 being in the form of points or zones, or lines, and continuous or discontinuous.
  • This embodiment is well suited to the case where the strip 1 is intended to be stored in an intermediate manner (that is to say between its manufacture and its use), in particular wound in a reel. She then prevents the longitudinal reinforcement zone 2 from disassembling.
  • the longitudinal reinforcement zone 2 is produced immediately before the implementation of the strip 1 thus reinforced - as described below - it is possible to dispense with such fastening 8, the application of the strip 1 on the load to be packaged (in the case of a packaging by application application) being sufficient to prevent the longitudinal reinforcement zone 2 from coming apart. This is an important feature of the invention.
  • a body 9 is incorporated into a longitudinal reinforcement zone 2 by being inserted between two adjacent longitudinal folding zones 3A, 3B ( Figures 4K).
  • This body 9 is for example a gas, in particular air, or a wire or strip for cutting the strip 1 or other function, or a liquid or a paste, or an informative or advertising medium, or an element of stiffening or additional reinforcement, or a shock absorbing element such as plastic foam.
  • this embodiment with the body 9 inserted is combined with the previous one, with welding -solidarisation in particular-, so as to ensure effective positive confinement of the body 9 in the longitudinal reinforcement zone 2. This is generally essential in the case where the body 9 is a gas, a liquid, a paste.
  • one or more longitudinal lines of weakness for the longitudinal rupture of the strip 1 may be provided at the location of a longitudinal reinforcement zone 2 or possibly outside such a zone.
  • the plastic film constituting the strip 1 is either heat shrinkable, or cold stretchable, especially in the longitudinal direction.
  • the film constituting the strip 1 is either continuous (without notable perforations) or discontinuous, in particular in the form of a net, or with macro-perforations.
  • the strip 1 according to the invention may also have the other characteristics generally known for the conventional strips of the prior art, in particular the existence of transverse breaking lines or transverse reinforcements, in particular by transverse folding.
  • strip 1 covers, as a general case and in the simplest embodiment, a strip originally of single thickness as has been generally described, but also, more generally, any sheet of film arranged with in a manner other than a strip, as well as a strip formed by a complex of several films or even a flat sheath, which corresponds to two superposed strips joined to one another.
  • a flat sheath can be of the type with longitudinal bellows.
  • these bellows can themselves constitute, being arranged flat, the longitudinal reinforcement zones 2 according to the invention.
  • This form of sheath, in particular with bellows is that of the strip 1 either finally, that is to say ready for use, or originally, with a view to the subsequent production of the longitudinal reinforcement zone 2.
  • the "longitudinal" character includes not only the abovementioned meaning, but also more generally means a direction along which the film extends over a very great length relative to its width, in particular can scroll with unwinding.
  • the invention then relates to a package for a load 10 comprising at least one longitudinal section of a strip with longitudinal reinforcement zone 2 as just described.
  • the strip section 1 is applied to the packaged load 10, a longitudinal reinforcement zone 2 of the strip section 1 being located where the packaging is to be reinforced, or the load 10 more protected.
  • the reinforcement can be located at other desired locations, as required and the function fulfilled by the reinforcement zone 2, possibly the body 9 inserted.
  • a longitudinal reinforcement zone 2 is applied to a projecting zone of the load 10, in particular an angle, a corner, an edge (FIG. 6).
  • the strip section 1 can also be part of the packaging without being applied to the load.
  • the strip section 1 can be located at the place where the packaging is to be opened, and this is particularly the case where the film strip 1 has an opening wire 9 and / or break lines.
  • the application of the strip section 1 on the load 10 and in particular on a protruding area allows the longitudinal reinforcing area 2 to be maintained without the need for additional attachment.
  • the invention also relates to a packaging method for producing such packaging.
  • a packaging method for producing such packaging comprises different stages in which a flexible strip 1 is unwound with a longitudinal reinforcement zone 2, a relative displacement of the strip 1 is carried out relative to the load 10 to be packaged in particular in order to apply the strip 1 to the load 10 and the strip 1 is rigidly associated on itself and / or on the load 10 (FIG. 7).
  • a strip (simple thickness, this also comprising the case of a flat sheath, as we have already seen) without reinforcement and it is unwound (more generally it is the object of a feeding) to successively firstly realize in particular continuously (or the) zone (s) of longitudinal reinforcement 2, then apply the strip thus reinforced on the load 10 (upper left part FIG. 7).
  • a second variant one starts from a strip with longitudinal reinforcement 1 already produced and in particular wound in a reel, it is taken up, in particular it is unwound, and it is applied to the load 10 as before (upper right part of FIG. 7) . Consequently, the step of producing the longitudinal reinforcement zone 2 is either integrated into the packaging process, or separate, the packaging process then using a reinforced strip 1 prepared separately and presented, for example, on a reel. .
  • a cold-stretchable plastic film is used and the strip 1 is stretched longitudinally during its application to the load 10, in particular either conventionally by the load 10 itself (conventional stretching), or by pre-stretching (the stretching is then dissociated from the load and carried out just before application) (part lower left figure 7).
  • a film of heat-shrinkable plastic is used and the strip 1 is heated once applied to the load 10, (lower right part in FIG. 7).
  • this step of the packaging process has the effect of ensuring the tight application of the strip 1 on the load 10 and, moreover, the rigid association of the longitudinal reinforcement zone 2 with the rest of band 1.
  • the packaging method comprises, optionally and if necessary, at least one phase during which a reinforcement zone 2 is produced and at least one phase during which such a zone 2 is not produced, the strip delivered and used in this phase then being devoid of such a zone of reinforcement 2, the strip being continuous between a section where it includes a reinforcement zone 2 and a section where it does not have such a zone.
  • Such packaging has the characteristic that the reinforcement is longitudinal, integrated into the strip 1 itself, that it can be placed in any desired location of the load 10, including for example on an edge or a corner thanks to the presence of the strip part 1 devoid of reinforcement zone 2 placed on either side of this zone 2 and forming a support.
  • the reinforcement zone 2 makes it possible to take advantage of the functions fulfilled by this reinforcement (clamping force, shockproof, etc.)
  • the invention then relates to a method for producing such a longitudinal reinforcement zone 2 on a strip.
  • the process can be discontinuous and concern a limited and finished longitudinal section of strip.
  • the method consists in performing a longitudinal folding of the strip generally progressively in transverse direction and this for the entire longitudinal section considered.
  • the process may preferably be continuous and relate to a section of strip of very great length or unlimited or continuous.
  • a single-thickness strip continuous as a whole, devoid of reinforcement; this strip is made to run in a longitudinal direction in a relative movement and in at least one longitudinal folding phase, at least two longitudinal folding areas 3A, 3B adjacent to the next strip are brought progressively in the longitudinal direction and / or in the transverse direction overlapping flat one on top of the other to form at least one longitudinal fold 7 constituting at least one part of longitudinal reinforcement zone 2.
  • This first variant is compatible with the fact that the single thickness strip is optionally made from 'a sheath split longitudinally, this prior step having no effect on the subsequent process according to the invention.
  • a second variant one starts from a strip in the form of a sheath with longitudinal bellows, continuous as a whole; the strip is scrolled in a longitudinal direction in a relative movement and in at least one longitudinal opening phase, the sheath is split longitudinally and the sheath is opened in the transverse direction while keeping the bellows, at least partially, so that the open sheath forms a flat strip whose longitudinal bellows constitutes the longitudinal reinforcement zone 2.
  • This second variant takes advantage of the known existence of conventional bellows sheaths.
  • the word strip covers the two variants (single thickness strip or sheath).
  • the longitudinal reinforcement zone 2 is produced essentially during the longitudinal folding phase and, in the second variant, during the opening and flattening phase.
  • the strip 1 is kept flat under tension in the longitudinal direction.
  • This tension is aimed at preserving the integrity of the longitudinal reinforcement zone 2 without the need for positive holding means, in particular for joining together (such as welding).
  • the strip 1 is applied and kept applied to the longitudinal reinforcement zone 2 on a support.
  • a coil is used as a support on which the strip 1 with longitudinal reinforcement zone 2 is wound, or at least one movable roller of a machine implementing the strip 1 with longitudinal reinforcement and on which this strip passes, or a load 10 to be covered with the strip 1 with longitudinal reinforcement, in particular a load to be packaged.
  • the reinforcing strip 1 is, from the longitudinal reinforcing zone 2 formed, applied to a load 10 for packaging.
  • the longitudinal folding zones 3A, 3B of the longitudinal reinforcing zone 2 are joined, in particular by welding, continuously or discontinuously, by point, by line or by zone, longitudinally and / or transversely.
  • a body 9 incorporated between two longitudinal folding zones 3A, 3B incorporated into the longitudinal reinforcement zone 2 and in particular the body 9 is sent so as to engage it between the two longitudinal folding zones 3A, 3B overlapping.
  • the mode of insertion depends, in particular, on the nature of the body 9, for example on its fluid or solid state.
  • this variant is preferably combined with the embodiment with the joining of the longitudinal reinforcing zone 2 so that it forms a closed cavity capable of holding and enclosing the fluid body 9.
  • the longitudinal reinforcement zone 2 one or more lines (or zones) continuous or not of weakening, in particular by punching.
  • the specific method for producing the longitudinal reinforcement zone 2 is associated with methods or steps of methods known per se for the shaping, treatment, arrangement, etc. of strips or sheaths, in particular the cutting or transverse welding, transverse folding, stretching (or pre-stretching), heat treatment.
  • a first longitudinal zone is scrolled, on the one hand of the strip, in particular at least part of a first longitudinal folding zone 3A, longitudinally along and against a first pad 11 longitudinally extended and limited situated on a first surface 6A of the strip 1 and, on the other hand, a second longitudinal zone of the strip, in particular at least part of a second longitudinal folding zone 3B, longitudinally along and against a second pad 12 longitudinally extended and limited situated on a second surface 6B of the strip 1; and, in combination, secondly, the first and second pads 11, 12 are arranged, so, on the one hand, that at the start of the longitudinal folding phase, the first and the second pads 11, 12 are placed on either side of the strip 1, being directed respectively towards its first surface 6A and its second surface 6B and, on the other hand, that at the end of the longitudinal folding phase the first and the second pads 11, 12 are placed on either side of at least part of one of the longitudinal
  • the bellows sheath is split longitudinally, keeping the bellows and the sheath and the bellows are placed flat by opening the sheath thus split.
  • the slot is placed at the desired location taking into account the final position sought for the longitudinal reinforcement zone 2.
  • the invention also relates to a device for producing a longitudinal reinforcement zone 2 on a strip.
  • a device for producing a longitudinal reinforcement zone 2 on a strip is generally characterized by the fact that it allows or is arranged to ensure the implementation of the method described previously.
  • the device is designed for a discontinuous implementation and, for this purpose, comprises means for gripping a section of strip in different zones spaced longitudinally and transversely - such as pliers, suction cups - and drive means with relative movement of these gripping means - such as endless chains or jacks - capable of bringing them into a position where the longitudinal folding zones 3A, 3B ... 3N are superimposed.
  • means for gripping a section of strip in different zones spaced longitudinally and transversely - such as pliers, suction cups - and drive means with relative movement of these gripping means - such as endless chains or jacks - capable of bringing them into a position where the longitudinal folding zones 3A, 3B ... 3N are superimposed.
  • the device is designed for continuous use.
  • Such a device comprises means for continuously feeding a strip without reinforcement, for driving in longitudinal movement. of this strip and of evacuation of the strip 1 with reinforcement; preferably means for keeping the strip under tension in the longitudinal direction; at least first and second runners 11, 12 longitudinally extended and limited which, in their active state, have their downstream end portions 13, 14 at least partially superimposed and spaced from each other in the direction perpendicular to their plane, having the function of conforming the strip which slides over them so that the downstream parts 13, 14 superimposed and spaced out overlap the longitudinal folding zones 3A, 3B.
  • These pads 11, 12 are arranged so that their upstream end portions 15, 16 are spaced transversely from one another.
  • the pads 11, 12 are arranged to move transversely towards each other from their upstream end portions 15, 16 to their downstream end portions 13, 14.
  • At least one pad is movable, in particular in its own plane , so that at least its downstream end portion 13, 14 can be moved away from the downstream end portion 14, 13 from the other pad 12, 11, drive means 17 being provided for moving the movable pad.
  • a shoe is mounted so as to pivot about an axis 18 perpendicular to its own plane situated at the place or in the vicinity of its upstream end part 15, 16, the drive means being constituted in particular by a jack in particular pneumatic.
  • a shoe 11, 12 is in the form of a blade arranged so that the strip can slide on its surface, this blade being limited by a longitudinal leading edge 19 in particular tapered but not cutting on which comes to be applied gradually and scroll the strip to form a longitudinal fold 7.
  • a shoe is in the form of a blade arranged so that the strip can slide on its surface, this blade comprising a longitudinal projection 20 relative to its plane, serving as a conformator.
  • the device comprises means 21 for inserting a body 9 between two longitudinal folding zones 3A, 3B, these means consisting, in particular, of a shoe with which said body 9 cooperates, this shoe 21 having the function guide said body 9 to bring it between the longitudinal folding zones 3A, 3B.
  • a central, fixed pad is provided, with longitudinal projection 20 and, on either side, two lateral movable pads of the leading edge type 29.
  • the fixed central pad is located on the side of a first surface 6A of the strip and the other two movable pads of the side of a second surface 6B.
  • the drive means 17 are controlled, such as the pneumatic cylinders opposite the axes 18 until the lateral runners are brought into view and on the central runner, these lateral runners being either juxtaposed in transverse direction, or even superimposed (case).
  • the lateral pads cause the desired displacement of the longitudinal folding zones 3A, 3B in order to produce the desired longitudinal reinforcement zone 2.
  • the device comprises means 21 for inserting a body 9 in the form of an insert strip.
  • These means comprise a support 22 for this insert strip, a deflection roller 23 for bringing the coplanar insert strip to the central shoe and the central shoe applying the insert strip to the longitudinal parts 3A, 3B, this is i.e. in the longitudinal reinforcement zone 2.
  • the device comprises means 21 for inserting a fluid body 9, in particular gaseous.
  • This body 9 can be introduced through feed holes 24 formed in the projection 20 in communication with outlet holes 25 of the blade of the skate located in the reinforcement zone 2.
  • This device can then be associated with fastening means, especially welding, of the reinforcement zone 2.
  • the device comprises means for continuously feeding the strip in the form of a bellows sheath, for driving in longitudinal movement and for evacuating the strip 1 with reinforcement produced; means for longitudinally splitting the sheath and means for opening the sheath while keeping the bellows at least partially formed.
  • the means for splitting the sheath are constituted for example by a sharp blade.
  • the means for opening the sheath are constituted, for example by clamps with controlled opening carried by drive means such as endless chain, jack, etc. or also by endless bands oriented in divergent manner to open the sheath.
  • the invention also relates, as a first particular case of packaging, to the packaging of a load of generally cylindrical shape, for example circular, in particular with its axis of revolution placed horizontally, this load being in particular a reel of paper 25.
  • the film used is a stretch film.
  • the method of packaging such a reel of paper 25 is such that generally, in at least a first phase, the strip is unwound without making reinforcement thereon and this strip is applied without reinforcement to at least part of the surface.
  • the film constituting the strip 1 is stretched or pre-stretched, which has the effect of causing the strip 1 to be applied to the end face (s) 29 of the load 25; the film strip 1 is cut transversely and its end end part is secured to the load 25 and / or to the intermediate part of the film strip 1 already applied to the load 25.
  • Such a method comprises, for example, a first initial phase, followed by a second phase relating to a first end edge 28, followed by a first intermediate phase, followed by a second phase relating to a second end edge 28 , followed by a first terminal phase.
  • the film is also stretched or pre-stretched during the first phase or phases.
  • the longitudinal reinforcement zone 2 produced during the second phase is preferably median.
  • a stepped longitudinal reinforcement zone 2 is produced comprising two lateral fringes with three layers and at least one central zone with at least five layers.
  • the film strip may be applied only to one and / or the other of the edges 28; between each turn of the strip, it can be cut and joined; the wrapping of the cylindrical surface 27 can be single-layered or multi-layered, straight or helical, with a strip whose useful width is equal to the axial length of the paper reel 25 or equal to only a fraction thereof ; the wrapping of the cylinder surface 27 can be done with a reinforcing strip 1; the film strip may cover all or only a part, if necessary very small, of the end faces 29.
  • the method only relates to the positioning of the strip with reinforcement on one or, preferably, the two edges 28, without the cylindrical surface 27 being covered.
  • the film used is heat-shrinkable and the process does not include a stretching or pre-stretching phase but a final heating phase.
  • the invention also relates to a reel of paper 25 packaged in accordance with this method and which therefore comprises at least one section of film strip 1 with a longitudinal reinforcement zone 2 on at least one end edge 28.
  • This strip is applied to the coil by stretching or heat shrinking.
  • the invention also relates to an installation for implementing this method.
  • Such an installation comprises support means 30 for a reel of film strip with a horizontal axis, motorized support means 31 for the load 25, capable of allowing it to pivot about its horizontal axis of revolution 26; a device 32 for continuously producing a longitudinal reinforcement zone 2 on the film strip, interposed between the support means 30, respectively the film strip reel itself, and the support means 31, respectively the load 25 itself , the strip of film passing in advance through this device 32; means for cross-cutting 33 of the film strip; means 34 for securing the film strip to itself and / or to the load 25; means for ensuring horizontal relative sliding of the device 32 and support means 31 for charging parallel to the axis 26; and means for stretching or pre-stretching the film.
  • such an installation also includes means for controlling the device 32, in particular coupled to the means for ensuring the relative sliding of said device 32 and support means 31 for charging, so that said device 32 is active when the means for ensuring relative sliding bring the film strip to the right of an end edge 28.
  • the transverse cutting means 33 and the securing means 34 are located from upstream to downstream near the load support means 31, respectively load 25.
  • the stretching means 35 are means for pre-stretching the film placed downstream of the device 32 to produce the reinforcement.
  • the installation can be arranged to allow the packaging of all or part of the cylindrical surface 27, the strip then being without reinforcement, the device 32 being inactive, and the device 32 being active when it is desired to place the reinforcement strip 1 on edge 28.
  • This installation can also be subject to variants.
  • it may comprise two reinforcement bands placed opposite each edge 28, instead of a single band displaced slidingly along the axis 26. It may comprise separate bands for covering the cylindrical surface 26 and an edge 28.
  • the covering of the cylindrical surface can also use the reinforcing strip 1, the device 32 being permanently active.
  • the installation can use a heat-shrinkable film, the stretching or pre-stretching means 35 being superimposed and the installation comprising heating means for heat-shrinking the film.
  • the invention relates to the packaging of a load having a generally parallelepiped shape, in particular with its axis 37 placed vertically, this load being, in particular a palletized load 36.
  • the film used is also stretchable.
  • the method of packaging such a palletized load is such that in at least one phase, the strip is unwound and a longitudinal reinforcement zone 2 is produced thereon and this strip with reinforcement 1 is applied to the load 36 and , simultaneously, the film is stretched or pre-stretched.
  • the load 36 is pivoted relative to the strip (in particular the strip spool), either the spool having a fixed axis and the pivoting load (rotary table machine) , either the reel being with a shaft mounted pivoting around an arm mounted for rotation and the fixed load (machine with rotating arm).
  • the longitudinal reinforcement zone 2 is applied to the upper end edge 38 and / or lower 39 and / or to the lateral face 40 near the upper horizontal face 41 and / or lower 42; and / or on the corners 43; and / or at the junction of two superimposed beds of elementary packages constituting the load 36; and / or at regular intervals between the upper 41 and lower 42 horizontal faces, or according to any other desired configuration.
  • this method makes it possible to produce a packaging according to FIG. 20 in which the film strip is placed diagonally on certain vertical faces of the load 36 between opposite top and bottom corners 43.
  • a packaging machine comprises support means 44 for a reel of film strip with a vertical axis; load support means 45; means for operating a relative displacement of the support means 44, respectively of the film strip reel, and support means 45, respectively of the load 36, pivotally about a vertical axis 46; a device 47 for continuously producing a longitudinal reinforcement zone 2 on the film strip, interposed between the support means 44 respectively the film strip reel, and the support means 45, respectively the load 36 itself, the film strip passing, in this device 44, means for transversely cutting the film strip; means for securing the film strip to itself and / or to the load; and means for stretching or pre-stretching the film 48.
  • the load 36 has a horizontal axis 37 instead of a vertical one and the axis of the film strip reel is also horizontal.
  • This variant is well suited to loads of great horizontal length.
  • the other characteristics described are also applicable to this variant.
  • the film is heat-shrinkable and non-stretchable and the machine includes means for integrated or separate heating such as a heating ramp, heat-shrinking frame, heating tunnel.

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Abstract

Method for continuously producing a longitudinal reinforcement on a flexible web of plastic film, characterised in that, starting with a web, which is continuous overall and has no reinforcement, the web is made to progress in a longitudinal direction in a relative movement and in at least one longitudinal folding stage, at least two adjacent longitudinal folding zones (3A, 3B) of the web are conveyed progressively in a longitudinal direction and/or in a transverse direction to overlap flat on one another in order to form at least one longitudinal pleat (7) forming at least a part of the longitudinal reinforcement zone (2), which permits the manufacture of a web which can be applied more especially to the formation of packaging which comprises at least one longitudinal reinforcement zone (2) consisting, at least partially, of N longitudinal folding zones (3a, 3b, 3N) of the web (1), adjacent to one another, with at least substantially flat overlapping, at least partially over one another, in the same longitudinal region of the web (1), N being a positive integer which is at least equal to two. <IMAGE>

Description

L'invention concerne une bande avec renfort longitudinal sa réalisation et sa mise en oeuvre.The invention relates to a strip with longitudinal reinforcement, its production and its use.

On connaît déjà différents procédés et installations pour emballer des bobines de papier, plus généralement des charges lourdes (pouvant atteindre la tonne) de forme générale cylindrique à axe horizontal. Dans une technique connue par l'usage, on place d'abord sur les deux arêtes d'extrémité de la surface cylindrique de la charge, arêtes de forme circulaire, des cornières, par exemple en carton, dont la fonction est de protéger les arêtes contre les chocs et donc d'éviter la détérioration de la charge, en l'occurrence du papier. Puis on enveloppe la surface cylindrique de la charge avec et dans une bande de film ou de papier, suffisamment serrée sur la charge et maintenant les cornières. Eventuellement, la cornière est maintenue par cerclage au moyen d'un ruban métallique. Une telle cornière peut comporter des fentes transversales sur son aile destinée à être appliquée sur la face d'extrémité de la charge, de manière à épouser le contour incurvé de l'arête correspondante de la charge. D'autres technologies sont connues de l'état de la technique (notamment documents US 4 137 690, US 4 565 049, FR 2 403 267, FR 2 449 035, FR 2 449 037, FR 2 504 491, DE 2 417 563). Toutefois, ces autres technologies ne parviennent pas à résoudre simplement et efficacement le double problème du cerclage ou du recouvrement au moins partiel de la surface cylindrique de la charge et éventuellement du recouvrement des surfaces planes et circulaires d'extrémité et surtout de la protection des arêtes d'extrémité de la charge d'une façon comparable à ce qui est réalisé dans la première technologie mentionnée, aucune des technologies connues n'étant donc satisfaisante. Dans une autre technologie, (document US 3 412 524) destinée à emballer un rouleau de pièces de monnaie, la partie saillante du film d'emballage est rabattue en étant froissée sur la face terminale du rouleau. Dans une autre technologie (document US 2 893 191) les cornières du renforcements sont fixées, par collage, au film emballant la surface cylindrique de la charge.Various processes and installations are already known for packaging reels of paper, more generally heavy loads (up to a ton) of generally cylindrical shape with horizontal axis. In a technique known by use, first place on the two end edges of the cylindrical surface of the load, edges of circular shape, angles, for example of cardboard, the function of which is to protect the edges against impact and therefore avoid deterioration of the load, in this case paper. Then the cylindrical surface of the load is wrapped with and in a strip of film or paper, sufficiently tightened on the load and holding the angles. Optionally, the angle iron is held by strapping by means of a metal strip. Such an angle iron may have transverse slots on its wing intended to be applied to the end face of the load, so as to match the curved outline of the corresponding edge of the load. Other technologies are known from the state of the art (in particular documents US 4 137 690, US 4 565 049, FR 2 403 267, FR 2 449 035, FR 2 449 037, FR 2 504 491, DE 2 417 563 ). However, these other technologies do not succeed in simply and effectively solving the double problem of strapping or at least partial covering of the cylindrical surface of the load and possibly of covering the plane and circular end surfaces and above all of protecting the edges. load end in a manner comparable to that achieved in the first technology mentioned, none of the known technologies being therefore satisfactory. In another technology (document US 3 412 524) intended for wrapping a roll of coins, the projecting part of the wrapping film is folded down by being crumpled on the end face of the roll. In another technology (document US 2 893 191) the angles of the reinforcements are fixed, by gluing, to the film wrapping the cylindrical surface of the load.

On connaît aussi, par ailleurs, la réalisation de plis longitudinaux, sur une bande de film (documents EP 0 068 341, US 4 395 255, FR 2 507 962, FR 2 507 963, FR 2 283 825 et également usage antérieur pour réaliser des sachets en matière plastique à partir d'une bande de film). Si la réalisation de plis longitudinaux est associée à un emballage, ce n'est pas, selon cet état de la technique, en vue d'être appliqué, à des charges telles que les bobines de papier pour une fonction de protection notamment des arêtes.We also know, moreover, the production of longitudinal folds on a strip of film (documents EP 0 068 341, US 4 395 255, FR 2 507 962, FR 2 507 963, FR 2 283 825 and also prior use for making plastic bags from a strip of film). If the production of longitudinal folds is associated with a packaging, it is not, according to this state of the art, with a view to being applied, to loads such as paper reels for a protective function in particular of the edges.

On connaît également la réalisation d'un renfort de housse d'emballage grâce à un pli transversal de la housse (documents FR 2 566 739 et BE 487 976), ou encore la réalisation d'un renfort de bande par doublement de l'épaisseur de celle-ci disposée en deux couches, ces deux couches étant seulement superposées.Also known is the production of a packaging cover reinforcement by means of a transverse fold of the cover (documents FR 2 566 739 and BE 487 976), or also the production of a strip reinforcement by doubling the thickness. thereof arranged in two layers, these two layers being only superimposed.

L'invention a pour objet une bande telle que celle applicable plus spécialement à la constitution d'un emballage, constituée plus spécialement par un film en matière plastique du type venu de fabrication d'une seule pièce à laquelle puisse être associé un renfort ainsi qu'un procédé et un dispositif pour la réaliser.The subject of the invention is a strip such as that which is more particularly applicable to the constitution of a package, more especially constituted by a plastic film of the type which has just been produced in one piece with which a reinforcement can be associated as well as 'a method and a device for carrying it out.

L'invention a aussi pour objets, un procédé d'emballage et un emballage mettant en oeuvre une telle bande ; et des applications particulières d'emballage de ce type, à savoir d'une part l'emballage d'une charge de forme générale cylindrique à axe de révolution horizontal tel qu'une bobine de papier et d'autre part le banderolage d'une charge palettisée.A subject of the invention is also a method of packaging and a packaging using such a strip; and particular packaging applications of this type, namely on the one hand the packaging of a load of generally cylindrical shape with horizontal axis of revolution such as a paper reel and on the other hand the wrapping of a palletized load.

Une bande telle que celle qui est concernée comporte au moins une zone de renfort longitudinale constituée, au moins pour partie, par N zones longitudinales de pliage de la bande, adjacentes les unes aux autres, à recouvrement au moins sensiblement à plat, au moins pour partie, les unes sur les autres, dans une même région longitudinale de la bande, N étant un nombre entier positif au moins égal à deux.A strip such as that which is concerned comprises at least one longitudinal reinforcement zone constituted, at least in part, by N longitudinal zones of folding of the strip, adjacent to each other, overlapping at least substantially flat, at least for part, one on top of the other, in the same longitudinal region of the strip, N being a positive integer at least equal to two.

Un emballage pour une charge comprend au moins un tel tronçon de bande en sens longitudinal. Plus spécialement, ce tronçon de bande est appliqué sur la charge emballée, de manière qu'une zone de renfort longitudinale du tronçon de bande soit située à l'endroit où l'emballage doit être renforcé ou la charge d'avantage protégée ou tout autre endroit souhaité.A package for a load comprises at least one such section of strip in the longitudinal direction. More specifically, this section of strip is applied to the packaged load, so that a longitudinal reinforcement zone of the strip section is located at the place where the packaging is to be reinforced or the advantage load protected or any other desired location.

Un procédé d'emballage d'une telle charge comporte les différentes étapes dans lesquelles on dévide une bande souple à renfort longitudinal, on effectue un déplacement relatif de la bande par rapport à la charge à emballer de manière que la bande soit appliquée sur la charge et on associe rigidement la bande sur elle-même et/ou sur la charge. Plus spécialement, soit on part d'une bande , dépourvue de renfort et on la dévide pour successivement réaliser, d'abord, en continu, le renfort longitudinal puis appliquer la bande ainsi renforcée sur la charge ; soit on part d'une bande à renfort longitudinal enroulée en bobine, on la dévide et on l'applique sur la charge.A method of packaging such a load comprises the various stages in which a flexible strip with longitudinal reinforcement is unwound, a relative displacement of the strip is carried out with respect to the load to be packaged so that the strip is applied to the load and the strip is rigidly associated on itself and / or on the load. More specifically, either we start from a strip, devoid of reinforcement and we unwind it to successively carry out, first, continuously, the longitudinal reinforcement then apply the strip thus reinforced to the load; either we start from a strip with longitudinal reinforcement wound in a reel, we unwind it and we apply it to the load.

Un procédé possible pour réaliser en continu un tel renfort sur une bande est tel qu'on part d'une bande à simple épaisseur, continue dans son ensemble, dépourvue de renfort, on fait défiler la bande en sens longitudinal selon un mouvement relatif et dans au moins une phase de pliage longitudinal, on amène progressivement, en sens longitudinal et en sens transversal, au moins deux zones longitudinales de pliage adjacentes de la bande à venir à recouvrement à plat l'une sur l'autre pour former au moins un pli longitudinal constituant au moins une partie de la zone de renfort longitudinale.One possible method for continuously producing such a reinforcement on a strip is such that one starts from a single-thickness strip, continuous as a whole, devoid of reinforcement, the strip is scrolled in a longitudinal direction in a relative movement and in at least one longitudinal folding phase, at least two adjacent longitudinal folding zones of the strip to be overlapped flat over one another are progressively brought in longitudinal and transverse directions to form at least one fold longitudinal constituting at least part of the longitudinal reinforcing zone.

Un dispositif pour la mise en oeuvre de ce procédé comporte des moyens d'amenée en continu de bande dépourvue de renfort, d'entraînement en défilement longitudinal de cette bande et d'évacuation de la bande à renfort ; des moyens pour maintenir la bande sous tension en sens longitudinal ; au moins un premier et un second patins longitudinalement étendus mais limités qui, dans leur état actif, ont leurs parties extrêmes aval au moins partiellement superposées et écartées l'une de l'autre dans la direction perpendiculaire à leur plan, ayant pour fonction de conformer la bande qui glisse sur eux de manière que ces parties aval superposées et écartées réalisent le recouvrement des zones longitudinales de pliage de la bande.A device for implementing this method comprises means for continuously feeding a strip without reinforcement, for driving this strip in longitudinal movement and for evacuating the strip with reinforcement; means for keeping the strip tensioned in the longitudinal direction; at least first and second longitudinally extended but limited pads which, in their active state, have their downstream end portions at least partially superimposed and spaced from one another in the direction perpendicular to their plane, having the function of conforming the strip which slides over them so that these superimposed and spaced downstream parts cover the longitudinal folding zones of the strip.

Selon un autre procédé possible pour réaliser en continu un tel renfort, on part d'une gaine comprenant au moins un soufflet longitudinal, on fend la gaine longitudinalement et on l'ouvre en gardant le soufflet.According to another possible method for continuously producing such a reinforcement, one starts from a sheath comprising at least one longitudinal bellows, the sheath is split longitudinally and is opened while keeping the bellows.

Un cas particulier de procédé d'emballage pour l'application emballage d'une bobine de papier est tel que, d'une part, la charge a une forme générale cylindrique, par exemple, circulaire, notamment avec son axe de révolution placé horizontalement, cette charge étant notamment une bobine de papier, et, d'autre part, le film est de type étirable ; dans au moins une première phase optionnelle, on dévide la bande sans nécessité de réaliser de renfort sur celle-ci et on applique cette bande sur au moins une partie de la surface cylindrique de la charge et, dans au moins une deuxième phase, on dévide la bande et on réalise sur celle-ci un renfort longitudinal et on applique cette bande avec renfort avec son renfort sur une arête d'extrémité de la surface cylindrique ; au moins pendant la ou les deuxièmes phases, on étire ou pré-étire le film, ce qui a pour effet de provoquer l'application de ce film sur la ou les faces d'extrémité de la charge ; on coupe transversalement la bande de film et on solidarise sa partie extrême terminale à la charge et/ou à la partie intermédiaire de la bande de film déjà appliquée sur la charge. Une installation pour la mise en oeuvre de ce procédé comporte des moyens support d'une bobine de bande de film à axe horizontal des moyens support motorisés de la charge, aptes à permettre son pivotement autour de son axe de révolution ; un dispositif pour réaliser en continu une zone de renfort longitudinale sur la bande de film, interposé entre les moyens support de bobine, respectivement la bobine de bande de film elle-même, et les moyens support de charge, respectivement la charge elle-même, la bande de film passant à défilement dans ce dispositif ; des moyens de coupe transversale de la bande de film ; des moyens de solidarisation de la bande de film sur elle-même et/ou sur la charge ; des moyens pour assurer un coulissement relatif horizontal du dispositif et des moyens support de charge parallèlement à l'axe de la charge ; et des moyens d'étirage ou de pré-étirage du film.A particular case of the packaging process for the packaging application of a paper reel is such that, on the one hand, the load has a generally cylindrical shape, for example, circular, in particular with its axis of revolution placed horizontally, this filler being in particular a reel of paper, and, on the other hand, the film is of the stretchable type; in at least one optional first phase, the strip is unwound without the need for reinforcement thereon and this strip is applied to at least part of the cylindrical surface of the load and, in at least a second phase, it is unwound the strip and a longitudinal reinforcement is produced on it and this strip is applied with reinforcement with its reinforcement to an end edge of the cylindrical surface; at least during the second phase or phases, the film is stretched or pre-stretched, which has the effect of causing the application of this film on the end face or faces of the load; the film strip is cut transversely and its end end part is secured to the load and / or to the intermediate part of the film strip already applied to the load. An installation for implementing this method comprises means for supporting a reel of film strip with a horizontal axis of the motorized support means for the load, capable of allowing it to pivot about its axis of revolution; a device for continuously producing a longitudinal reinforcement zone on the film strip, interposed between the reel support means, respectively the film strip reel itself, and the load support means, respectively the load itself, the film strip passing through this device; means for cross-cutting the film strip; means for securing the film strip to itself and / or to the load; means for ensuring horizontal relative sliding of the device and load support means parallel to the axis of the load; and means for stretching or pre-stretching the film.

Un autre cas particulier de procédé d'emballage pour l'application banderolage est tel que, d'une part, la charge a une forme générale parallélépipédique notamment avec son axe placé verticalement, cette charge étant notamment une charge palettisée et, d'autre part, le film est du type étirable ; dans au moins une phase, on dévide la bande, on réalise sur celle-ci un renfort longitudinal et on applique cette bande avec renfort sur la charge et, simultanément, on étire ou pré-étire le film. Une machine pour la mise en oeuvre de ce procédé comporte des moyens support d'une bobine de bande de film à axe vertical ; des moyens support de charge ; des moyens pour opérer un déplacement relatif des moyens support de bobine de bande de film, respectivement de la bobine de bande de film et des moyens support de charge, respectivement de la charge, à pivotement autour d'un axe vertical; un dispositif pour réaliser, en continu, un renfort sur la bande de film, interposé entre les moyens support de la bobine de bande de film, respectivement la bobine de bande de film, et les moyens support de charge, respectivement la charge elle-même, la bande de film passant à défilement dans ce dispositif ; des moyens de coupe transversale de la bande de film ; des moyens de solidarisation de la bande de film sur elle-même et/ou sur la charge ; et des moyens d'étirage ou de pré-étirage du film.Another particular case of the packaging process for the wrapping application is such that, on the one hand, the load has a generally parallelepiped shape in particular with its axis placed vertically, this load being in particular a palletized load and, on the other hand, the film is of the stretchable type; in at least one phase, the strip is unwound, a longitudinal reinforcement is produced thereon and this strip is applied with reinforcement to the load and, simultaneously, the film is stretched or pre-stretched. A machine for implementing this method comprises means for supporting a reel of film strip with a vertical axis; load support means; means for effecting relative displacement of the film strip reel support means, respectively of the film strip reel and load support means, respectively of the load, pivotally about a vertical axis; a device for carrying out, continuously, a reinforcement on the film strip, interposed between the support means of the film strip reel, respectively the film strip reel, and the load support means, respectively the charge itself , the strip of film passing in advance through this device; means for cross-cutting the film strip; means for securing the film strip to itself and / or to the load; and means for stretching or pre-stretching the film.

L'invention est fondée sur le concept d'une bande de film à laquelle est intégré un renfort longitudinal homogène comprenant un ou plusieurs pli longitudinal, c'est-à-dire une ou plusieurs couches ou épaisseurs de film superposées. Une telle bande peut être réalisée en continu à partir d'une bande classique de l'état de la technique. La localisation du renfort en sens longitudinal ou en sens transversal, son étendue transversale, son importance (nombre de couches superposées), permettent de nombreuses variantes de réalisation selon les besoins. Ce renfort permet d'emprisonner un corps solide, liquide ou gazeux. La bande et son renfort longitudinal forment un tout monobloc, indissociable, ce qui distingue la bande selon l'invention de deux couches de bande simplement superposées.The invention is based on the concept of a film strip in which is integrated a homogeneous longitudinal reinforcement comprising one or more longitudinal folds, that is to say one or more superimposed layers or thicknesses of film. Such a strip can be produced continuously from a conventional strip of the prior art. The location of the reinforcement in the longitudinal direction or in the transverse direction, its transverse extent, its importance (number of superimposed layers), allow numerous variants of embodiment as required. This reinforcement makes it possible to imprison a solid, liquid or gaseous body. The strip and its longitudinal reinforcement form a single unit, inseparable, which distinguishes the strip according to the invention from two layers of strip simply superimposed.

Dans le procédé d'emballage pour bobine de papier, on utilise la même bobine de film et la même installation pour l'emballage de la face cylindrique et des faces d'extrémité.In the packaging process for paper reels, the same film reel and the same installation are used for packaging the cylindrical face and the end faces.

Les autres caractéristiques et avantages de l'invention résulteront de la description qui suivra en référence aux dessins annexés dans lesquels :

  • . La figure 1 et la figure 2 montrent un tronçon de bande de film respectivement de l'état connu de la technique et selon l'invention.
  • . La figure 3 est une vue en coupe transversale selon la ligne III-III de la figure 2 montrant à plus grande échelle une forme possible de renfort selon l'invention.
  • . Les figures 4A à 4K sont onze vues schématiques en coupe transversales illustrant différentes variantes de réalisation de renfort selon l'invention.
  • . Les figures 5A et 5B sont deux vues schématiques en élévation de deux autres variantes de réalisation de l'invention illustrant le renfort en sens longitudinal.
  • . La figure 6 est une vue schématique partielle en coupe transversale illustrant un emballage selon l'invention et la fonction du renfort.
  • . La figure 7 est une vue schématique du procédé d'emballage selon plusieurs variantes possibles.
  • . La figure 8 est une vue schématique du procédé de réalisation du renfort.
  • . Les figures 9 et 10 sont deux vues schématiques en perspective illustrant un dispositif possible pour réaliser un renfort dans deux états différents.
  • . La figure 11 est une vue schématique en perspective illustrant une variante de ce dispositif pour l'introduction d'un corps en forme de bande dans le renfort.
  • . Les figures 12 et 13 sont deux vues schématiques en perspective illustrant une autre variante du dispositif pour l'introduction d'un corps gazeux dans le renfort.
  • . La figure 14 est une vue schématique en élévation d'une installation pour l'emballage de bobine de papier selon l'invention.
  • . La figure 15 est une vue de dessus de cette installation illustrant deux états possibles respectivement pour l'emballage de la surface cylindrique et la surface d'extrémité.
  • . La figure 16 est une vue en perspective d'une bobine de papier ainsi emballée conformément à l'invention.
  • . La figure 17 est une vue schématique en coupe radiale de ladite bobine de papier emballée de la figure 16.
  • . Les figures 18 et 19 sont deux vues en perspective d'une machine pour banderolage selon l'invention dans deux états possibles de fonctionnement.
  • . La figure 20 est une vue en perspective d'une charge palettisée emballée au moyen de la machine des figures 18 et 19.
The other characteristics and advantages of the invention will emerge from the description which follows with reference to the appended drawings in which:
  • . FIG. 1 and FIG. 2 show a section of film strip respectively from the prior art and according to the invention.
  • . Figure 3 is a cross-sectional view along line III-III of Figure 2 showing on a larger scale a possible form of reinforcement according to the invention.
  • . FIGS. 4A to 4K are eleven schematic views in transverse section illustrating different alternative embodiments of reinforcement according to the invention.
  • . Figures 5A and 5B are two schematic elevational views of two other alternative embodiments of the invention illustrating the reinforcement in the longitudinal direction.
  • . Figure 6 is a partial schematic view in cross section illustrating a package according to the invention and the function of the reinforcement.
  • . Figure 7 is a schematic view of the packaging method according to several possible variants.
  • . Figure 8 is a schematic view of the method of producing the reinforcement.
  • . Figures 9 and 10 are two schematic perspective views illustrating a possible device for producing a reinforcement in two different states.
  • . Figure 11 is a schematic perspective view illustrating a variant of this device for the introduction of a strip-shaped body in the reinforcement.
  • . Figures 12 and 13 are two schematic perspective views illustrating another variant of the device for the introduction of a gaseous body into the reinforcement.
  • . Figure 14 is a schematic elevational view of an installation for packaging paper reels according to the invention.
  • . FIG. 15 is a top view of this installation illustrating two possible states respectively for the packaging of the cylindrical surface and the end surface.
  • . Figure 16 is a perspective view of a paper reel thus packaged in accordance with the invention.
  • . FIG. 17 is a schematic view in radial section of said wrapped paper reel of FIG. 16.
  • . Figures 18 and 19 are two perspective views of a wrapping machine according to the invention in two possible operating states.
  • . FIG. 20 is a perspective view of a palletized load packed by means of the machine of FIGS. 18 and 19.

L'invention concerne d'abord une bande 1 souple, applicable plus spécialement mais non exclusivement à la constitution d'emballage, constituée plus spécialement par un film en matière plastique, du type venu de fabrication d'une seule pièce. Cette bande 1 comporte au moins une zone de renfort longitudinale 2 constituée, au moins pour partie, par N zones longitudinales de pliage 3a, 3b...3N de la bande 1, adjacentes les unes aux autres, à recouvrement au moins sensiblement à plat, au moins pour partie les unes sur les autres, dans une même région longitudinale de la bande 1, N étant un nombre entier positif au moins égal à deux (figure 2).The invention firstly relates to a flexible strip 1, more specifically but not exclusively applicable to the constitution of packaging, more especially constituted by a plastic film, of the type which has come from one-piece production. This strip 1 comprises at least one longitudinal reinforcement zone 2 constituted, at least in part, by N longitudinal folding zones 3a, 3b ... 3N of the strip 1, adjacent to each other, overlapping at least substantially flat , at least partly on top of each other, in the same longitudinal region of the strip 1, N being a positive integer at least equal to two (FIG. 2).

Une telle bande 1 selon l'invention peut être comparée à une bande de l'état connu de la technique selon la figure 1. La bande selon l'état connu de la technique est venue d'une pièce de fabrication et comporte une épaisseur unique sur toute sa surface les propriétés physiques de la bande étant homogènes ou plus ou moins homogènes sur toute sa surface, tant en sens longitudinal qu'en sens transversal. Ces propriétés sont notamment l'épaisseur, le pouvoir d'absorption des chocs, etc... Au contraire, la bande 1 selon l'invention comporte une zone de renfort longitudinale intégrée à la bande 1 et réalisée par la bande 1 elle-même, par suite de son pliage longitudinal. La bande 1 selon l'invention s'oppose donc, à cet égard, à d'autres bandes également connues de l'état de la technique dans lesquelles un renfort est rapporté sur la bande. La bande 1 est limitée par deux bords longitudinaux 4 parallèles à l'axe longitudinal 5 de la bande 1. Dans la suite de la description on entend par direction "transversale" une direction perpendiculaire à l'axe longitudinal 5 et dans le plan de la bande 1. La bande 1 définit une nappe ayant deux grandes surfaces opposées respectivement 6A et 6B (par exemple l'endroit et l'envers ou le recto et le verso). On entend par deux (ou plus) zones longitudinales de pliage 3A, 3B, adjacentes entre elles à recouvrement au moins sensiblement à plat, la réalisation avec la bande 1 d'un pli longitudinal 7, parallèle à l'axe longitudinal 5 séparant les deux zones 3A, 3B elles aussi longitudinales en contact par leur même surface 6A ou 6B ou ayant leurs mêmes surfaces 6A ou 6B tournées l'une vers l'autre. Dans la forme d'exécution la plus simple, la zone de renfort longitudinale comporte deux zones longitudinales de pliage 3A et 3B et un pli 7 unique (figure 4A). Dans la forme d'exécution la plus générale ou la plus fréquente, la zone de renfort longitudinale comporte trois zones longitudinales de pliage 3A, 3B, 3C superposées et deux plis 7A, 7B, écartées transversalement l'un de l'autre (figure 3).Such a strip 1 according to the invention can be compared to a strip of the known state of the art according to Figure 1. The strip according to the known state of the art came from a workpiece and has a single thickness over its entire surface, the physical properties of the strip being homogeneous or more or less homogeneous over its entire surface, both longitudinally and transversely. These properties are in particular the thickness, the power of shock absorption, etc. On the contrary, the strip 1 according to the invention comprises a longitudinal reinforcement zone integrated into the strip 1 and produced by the strip 1 itself , due to its longitudinal folding. The strip 1 according to the invention therefore opposes, in this respect, other strips also known from the state of the art in which a reinforcement is attached to the strip. The strip 1 is bounded by two longitudinal edges 4 parallel to the longitudinal axis 5 of the strip 1. In the following description, the term "transverse" direction means a direction perpendicular to the longitudinal axis 5 and in the plane of the strip 1. Strip 1 defines a sheet having two large opposite surfaces respectively 6A and 6B (for example the place and the reverse or the front and back). By two (or more) longitudinal folding zones 3A, 3B, which are adjacent to each other at least substantially flat, is meant the realization with the strip 1 of a longitudinal fold 7, parallel to the longitudinal axis 5 separating the two zones 3A, 3B also longitudinal in contact by their same surface 6A or 6B or having their same surfaces 6A or 6B facing one another. In the simplest embodiment, the longitudinal reinforcement zone comprises two longitudinal folding zones 3A and 3B and a single fold 7 (FIG. 4A). In the most general or most frequent embodiment, the longitudinal reinforcement zone has three longitudinal folding zones 3A, 3B, 3C superposed and two folds 7A, 7B, spaced transversely from one another (FIG. 3 ).

On entend par zone de renfort 2 le fait que dans cette zone de la bande 1, la bande 1 comporte un plus grand nombre d'épaisseurs de film que dans le reste de la bande 1. On entend par recouvrement à plat le fait que les zones longitudinales de pliage 3A, 3B sont appliquées l'une sur l'autre ou tournées l'une vers l'autre de manière que la bande 1 garde, malgré la présence de la zone de renfort longitudinale une forme générale de bande plane, simplement plus épaisse à l'endroit du renfort ainsi constitué.Reinforcement zone 2 is understood to mean the fact that in this zone of strip 1, strip 1 has a greater number of film thicknesses than in the rest of strip 1. It is understood by flat covering that longitudinal folding zones 3A, 3B are applied one on the other or turned towards each other so that the strip 1 retains, despite the presence of the longitudinal reinforcement area, a general shape of flat strip, simply thicker at the location of the reinforcement thus formed.

Une zone de renfort longitudinale 2 peut être utilisée fonctionnellement de nombreuses façons possibles, soit pour ses qualités de résistance, soit en ce qu'elle constitue une surépaisseur par rapport au reste de la bande 1 ayant une fonction de protection contre les chocs. Ces fonctions et d'autres sont mises à profit dans les différentes applications possibles d'une telle bande 1 selon l'invention.A longitudinal reinforcement zone 2 can be used functionally in many possible ways, either for its strength qualities, or in that it constitutes an additional thickness compared to the rest of the strip 1 having a shock protection function. These and other functions are used to advantage in the various possible applications of such a strip 1 according to the invention.

La bande 1 à renfort 2 selon l'invention peut faire l'objet de nombreuses variantes de réalisation : une zone de renfort longitudinale 2 est soit attenante ou proche du bord longitudinal 4 de la bande 1, soit dans ou proche de la partie longitudinale médiane de la bande 1, soit située dans une partie latérale de la bande 1, entre son axe longitudinal 5 et un bord longitudinal 4 (respectivement figures 4A, 4B, 4C). La bande 1 peut comporter soit une zone de renfort longitudinale 2 unique, soit plusieurs zones de renfort longitudinales 2 (respectivement figure 4B notamment et figure 4D ou 4E). Dans le cas où il existe plusieurs zones de renfort longitudinales 2, celles-ci sont soit adjacentes, soit écartées transversalement l'une de l'autre (respectivement figures 4E et 4D). Préférentiellement, mais non limitativement, la bande 1 est caractérisée par une disposition symétrique ou sensiblement symétrique de la ou des zones de renfort longitudinales 2 par rapport à l'axe longitudinal médian 5 de la bande 1 (figures 4B, 4D à 4K), par opposition à une disposition dissymétrique (figures 4A, 4C).The strip 1 with reinforcement 2 according to the invention can be the subject of numerous variant embodiments: a longitudinal reinforcement zone 2 is either adjoining or close to the longitudinal edge 4 of the strip 1, or in or near the median longitudinal part of the strip 1, is situated in a lateral part of the strip 1, between its longitudinal axis 5 and a longitudinal edge 4 (respectively FIGS. 4A, 4B, 4C). The strip 1 can comprise either a single longitudinal reinforcement zone 2, or several longitudinal reinforcement zones 2 (respectively FIG. 4B in particular and FIG. 4D or 4E). In the case where there are several longitudinal reinforcement zones 2, these are either adjacent or separated transversely from one another (FIGS. 4E and 4D respectively). Preferably, but not limited to, the strip 1 is characterized by a symmetrical or substantially symmetrical arrangement of the longitudinal reinforcement zone (s) 2 relative to the median longitudinal axis 5 of the strip 1 (FIGS. 4B, 4D to 4K), by opposition to an asymmetrical arrangement (Figures 4A, 4C).

Selon une autre caractéristique, la bande 1 est caractérisée par une disposition d'une zone de renfort 2 qui en sens longitudinal est soit continue, soit discontinue agencée en tronçons longitudinaux distincts notamment séparés les uns des autres, plus ou moins étendus en sens longitudinal (respectivement figures 5A et 5B).According to another characteristic, the strip 1 is characterized by an arrangement of a reinforcement zone 2 which in the longitudinal direction is either continuous or discontinuous, arranged in separate longitudinal sections in particular separated from each other, more or less extended in the longitudinal direction ( Figures 5A and 5B respectively).

La possibilité d'avoir des zones de renfort longitudinales 2 limitées longitudinalement, sans rupture ou discontinuité de la bande 1 est une caractéristique importante et avantageuse de l'invention. Elle permet une grande polyvalence d'emploi d'une telle bande 1.The possibility of having longitudinal reinforcement zones 2 limited longitudinally, without rupture or discontinuity of the strip 1 is an important and advantageous characteristic of the invention. It allows great versatility in the use of such a band 1.

Selon une autre caractéristique, la bande 1 est caractérisée par une disposition d'une zone de renfort longitudinale 2 soit longiligne ou sensiblement longiligne ou curviligne , soit étendue transversalement (respectivement figure 4F et figures 3, 4A, 4B, 4C). On entend par disposition longiligne ou sensiblement longiligne ou curviligne, le fait que la dimension transversale des zones de pliage 3A et 3B à recouvrement soit très faible en valeur absolue ou en valeur relative par rapport à la laize de la bande 1 ou encore par rapport à son épaisseur. Dans ce cas, la zone de renfort longitudinale 2 s'apparente à une nervure longitudinale.According to another characteristic, the strip 1 is characterized by an arrangement of a longitudinal reinforcement zone 2 either elongated or substantially elongated or curvilinear, or extended transversely (respectively FIG. 4F and FIGS. 4, 4A, 4B, 4C). By elongated or substantially elongated or curvilinear arrangement, the fact that the transverse dimension of the folding zones 3A and 3B with overlap is very small in absolute value or in relative value compared to the width of the strip 1 or even compared to its thickness. In this case, the longitudinal reinforcement zone 2 is similar to a longitudinal rib.

Selon une autre caractéristique, la bande 1 est caractérisée par une disposition d'une zone de renfort longitudinale 2 sur la bande 1 qui est soit localisée, soit étendue transversalement sur tout ou seulement sur une partie de la largeur transversale de la bande 1 (respectivement figures 4B et 4G par exemple). Dans le cas d'une disposition localisée, la zone de renfort 2 n'occupe qu'une faible partie seulement de la bande 1 en sens transversal. Par opposition, la zone de renfort 2 peut occuper une partie notable de la largeur de la bande 1 ou toute cette largeur.According to another characteristic, the strip 1 is characterized by an arrangement of a longitudinal reinforcing zone 2 on the strip 1 which is either localized or extended transversely over all or only over part of the transverse width of the strip 1 (respectively Figures 4B and 4G for example). In the case of a localized arrangement, the reinforcement zone 2 occupies only a small part of the strip 1 in the transverse direction. In contrast, the reinforcement zone 2 can occupy a significant part of the width of the strip 1 or all of this width.

Selon une autre caractéristique, les N zones longitudinales de pliage 3A, 3B, ... 3N constituant la zone de renfort longitudinale 2 sont soit de même largeur transversale et superposées en constituant alors un renfort longitudinal 2 d'épaisseur constante en sens transversal, soit décalées et/ou de largeurs différentes en constituant alors un renfort longitudinal 2 d'épaisseur variable en sens transversal (respectivement figures 4H et 4I). En particulier, dans ce dernier cas, un tel renfort 2 comporte une plus grande épaisseur dans sa ligne longitudinale médiane et une plus faible épaisseur sur son bord longitudinal avec, notamment, une épaisseur décroissant depuis la ligne longitudinale médiane jusqu'au bord longitudinal. Cette caractéristique de structure de la bande 1 est importante et avantageuse puisqu'elle permet la réalisation d'une zone de renfort longitudinale 2 plus ou moins importante selon l'emplacement en sens transversal.According to another characteristic, the N longitudinal folding zones 3A, 3B, ... 3N constituting the longitudinal reinforcement zone 2 are either of the same transverse width and superimposed while then constituting a longitudinal reinforcement 2 of constant thickness in transverse direction, or offset and / or of different widths, thus constituting a longitudinal reinforcement 2 of variable thickness in the transverse direction (respectively FIGS. 4H and 4I). In particular, in the latter case, such a reinforcement 2 has a greater thickness in its median longitudinal line and a smaller thickness on its longitudinal edge with, in particular, a thickness decreasing from the median longitudinal line to the longitudinal edge. This structural characteristic of the strip 1 is important and advantageous since it allows the production of a more or less significant longitudinal reinforcement zone 2 depending on the location in the transverse direction.

Selon une forme de réalisation possible, optionnelle, les zones longitudinales de pliage 3A, 3B ... sont solidarisées ensemble notamment par soudage 8 (figure 4J), ce soudage 8 étant sous forme de points ou de zones, ou de lignes, et continu ou discontinu. Cette forme de réalisation est bien adaptée au cas où la bande 1 est destinée à être stockée de façon intermédiaire (c'est-à-dire entre sa fabrication et son utilisation), notamment enroulée en bobine. Elle évite alors à la zone de renfort longitudinale 2 de se démonter. Dans le cas où on réalise la zone de renfort longitudinale 2 immédiatement avant la mise en oeuvre de la bande 1 ainsi renforcée -comme cela est décrit ci-dessous- il est possible de se dispenser de telles solidarisations 8, l'application de la bande 1 sur la charge à emballer (dans cas d'une application emballage par application) étant suffisante pour éviter que la zone de renfort longitudinale 2 ne se démonte. Cela est une caractéristique importante de l'invention.According to a possible, optional embodiment, the longitudinal folding zones 3A, 3B ... are joined together in particular by welding 8 (FIG. 4J), this welding 8 being in the form of points or zones, or lines, and continuous or discontinuous. This embodiment is well suited to the case where the strip 1 is intended to be stored in an intermediate manner (that is to say between its manufacture and its use), in particular wound in a reel. She then prevents the longitudinal reinforcement zone 2 from disassembling. In the case where the longitudinal reinforcement zone 2 is produced immediately before the implementation of the strip 1 thus reinforced - as described below - it is possible to dispense with such fastening 8, the application of the strip 1 on the load to be packaged (in the case of a packaging by application application) being sufficient to prevent the longitudinal reinforcement zone 2 from coming apart. This is an important feature of the invention.

Selon une forme de réalisation possible, optionnelle, un corps 9 est incorporé à une zone de renfort longitudinale 2 en étant inséré entre deux zones longitudinales de pliage 3A, 3B adjacentes (figures 4K). Ce corps 9 est par exemple un gaz, notamment de l'air, ou un fil ou bande de découpe de la bande 1 ou d'autre fonction, ou un liquide ou une pâte, ou un support informatif ou publicitaire, ou un élément de rigidification ou de renfort supplémentaire, ou un élément amortissant les chocs tel que de la mousse en matière plastique. Préférentiellement, cette forme de réalisation avec corps 9 inséré est combinée avec la précédente, avec soudage -solidarisation notamment-, de manière à assurer un emprisonnement positif effectif du corps 9 dans la zone de renfort longitudinale 2. Cela est généralement indispensable dans le cas où le corps 9 est un gaz, un liquide, une pâte.According to a possible, optional embodiment, a body 9 is incorporated into a longitudinal reinforcement zone 2 by being inserted between two adjacent longitudinal folding zones 3A, 3B (Figures 4K). This body 9 is for example a gas, in particular air, or a wire or strip for cutting the strip 1 or other function, or a liquid or a paste, or an informative or advertising medium, or an element of stiffening or additional reinforcement, or a shock absorbing element such as plastic foam. Preferably, this embodiment with the body 9 inserted is combined with the previous one, with welding -solidarisation in particular-, so as to ensure effective positive confinement of the body 9 in the longitudinal reinforcement zone 2. This is generally essential in the case where the body 9 is a gas, a liquid, a paste.

Le cas échéant, une ou plusieurs lignes longitudinales d'affaiblissement pour la rupture longitudinale de la bande 1 peut être prévue à l'endroit d'une zone de renfort longitudinale 2 ou éventuellement en dehors d'une telle zone.Where appropriate, one or more longitudinal lines of weakness for the longitudinal rupture of the strip 1 may be provided at the location of a longitudinal reinforcement zone 2 or possibly outside such a zone.

Selon une autre caractéristique, le film en matière plastique constituant la bande 1 est soit thermorétractable, soit étirable à froid notamment en sens longitudinal .According to another characteristic, the plastic film constituting the strip 1 is either heat shrinkable, or cold stretchable, especially in the longitudinal direction.

Selon une autre caractéristique, le film constituant la bande 1 est soit continu (sans perforations notables) soit discontinu, notamment sous forme de filet, ou avec des macro-perforations.According to another characteristic, the film constituting the strip 1 is either continuous (without notable perforations) or discontinuous, in particular in the form of a net, or with macro-perforations.

Pour autant que cela soit possible et souhaitable , les différentes variantes décrites précédement peuvent être combinées les unes avec les autres. De telles combinaisons s'entendent "en parallèle" sur un même tronçon longitudinal de bande 1 ou "en série" sur des tronçons longitudinaux de bande 1 distincts.As far as possible and desirable, the different variants described above can be combined with others. Such combinations are understood to be "in parallel" on the same longitudinal section of strip 1 or "in series" on longitudinal sections of separate strip 1.

La bande 1 selon l'invention peut également présenter les autres caractéristiques généralement connues pour les bandes classiques de l'état de la technique , notamment l'existence de lignes de rupture transversales ou des renforts transversaux, notamment par pliage transversal.The strip 1 according to the invention may also have the other characteristics generally known for the conventional strips of the prior art, in particular the existence of transverse breaking lines or transverse reinforcements, in particular by transverse folding.

Il est enfin entendu que la notion de bande 1 recouvre comme cas général et dans la forme de réalisation la plus simple une bande originellement à simple épaisseur ainsi qu'il a été généralement décrit mais aussi, plus généralement une nappe quelconque de film agencée d'une manière autre qu'une bande, ainsi qu'une bande constituée par un complexe de plusieurs films ou encore une gaine à plat ce qui correspond à deux bandes superposées réunies l'une à l'autre. Une telle gaine à plat peut être du type à soufflets longitudinaux. Dans ce cas, ces soufflets peuvent constituer eux-mêmes, étant disposés à plat, les zones de renfort longitudinales 2 selon l'invention. Cette forme de gaine, notamment à soufflets, est celle de la bande 1 soit finalement c'est-à-dire prête à l'usage, soit originellement, en vue de la réalisation ultérieure de la zone de renfort longitudinale 2 .It is finally understood that the concept of strip 1 covers, as a general case and in the simplest embodiment, a strip originally of single thickness as has been generally described, but also, more generally, any sheet of film arranged with in a manner other than a strip, as well as a strip formed by a complex of several films or even a flat sheath, which corresponds to two superposed strips joined to one another. Such a flat sheath can be of the type with longitudinal bellows. In this case, these bellows can themselves constitute, being arranged flat, the longitudinal reinforcement zones 2 according to the invention. This form of sheath, in particular with bellows, is that of the strip 1 either finally, that is to say ready for use, or originally, with a view to the subsequent production of the longitudinal reinforcement zone 2.

Enfin, il doit être entendu que le caractère "longitudinal" comprend non seulement l'acception précédemment donnée mais, aussi, plus généralement s'entend d'une direction le long de laquelle le film s'étend sur une très grande longueur par rapport à sa largeur, notamment peut défiler à dévidement.Finally, it should be understood that the "longitudinal" character includes not only the abovementioned meaning, but also more generally means a direction along which the film extends over a very great length relative to its width, in particular can scroll with unwinding.

L'invention concerne, ensuite, un emballage pour une charge 10 comportant au moins un tronçon longitudinal d'une bande à zone de renfort longitudinale 2 telle qu'elle vient d'être décrite.The invention then relates to a package for a load 10 comprising at least one longitudinal section of a strip with longitudinal reinforcement zone 2 as just described.

En général, le tronçon de bande 1 est appliqué sur la charge 10 emballée, une zone de renfort longitudinale 2 du tronçon de bande 1 étant située à l'endroit où l'emballage doit être renforcé, ou la charge 10 davantage protégée. Toutefois, le renfort peut être situé à d'autres endroits souhaités, selon les besoins et la fonction remplie par la zone de renfort 2, éventuellement le corps 9 inséré. Préférentiellement, une zone de renfort longitudinale 2 est appliquée sur une zone en saillie de la charge 10, notamment un angle, un coin, une arête (figure 6). Le tronçon de bande 1 peut également faire partie de l'emballage sans être appliqué sur la charge. Eventuellement, le tronçon de bande 1 peut être localisé à l'endroit où l'emballage doit être ouvert et ceci tout particulièrement dans le cas ou la bande de film 1 comporte un fil d'ouverture 9 et/ou des lignes de rupture. Ainsi qu'il est déjà indiqué, l'application du tronçon de bande 1 sur la charge 10 et notamment sur une zone de saillie permet à la zone de renfort longitudinale 2 de se maintenir sans la nécessité de solidarisation annexe.In general, the strip section 1 is applied to the packaged load 10, a longitudinal reinforcement zone 2 of the strip section 1 being located where the packaging is to be reinforced, or the load 10 more protected. However, the reinforcement can be located at other desired locations, as required and the function fulfilled by the reinforcement zone 2, possibly the body 9 inserted. Preferably, a longitudinal reinforcement zone 2 is applied to a projecting zone of the load 10, in particular an angle, a corner, an edge (FIG. 6). The strip section 1 can also be part of the packaging without being applied to the load. Optionally, the strip section 1 can be located at the place where the packaging is to be opened, and this is particularly the case where the film strip 1 has an opening wire 9 and / or break lines. As already indicated, the application of the strip section 1 on the load 10 and in particular on a protruding area allows the longitudinal reinforcing area 2 to be maintained without the need for additional attachment.

L'invention concerne également un procédé d'emballage pour réaliser un tel emballage. Un tel procédé comporte différentes étapes dans lesquelles on dévide une bande souple 1 à zone de renfort longitudinale 2, on effectue un déplacement relatif de la bande 1 par rapport à la charge 10 à emballer notamment en vue d'appliquer la bande 1 sur la charge 10 et on associe rigidement la bande 1 sur elle-même et/ou sur la charge 10 (figure 7).The invention also relates to a packaging method for producing such packaging. Such a method comprises different stages in which a flexible strip 1 is unwound with a longitudinal reinforcement zone 2, a relative displacement of the strip 1 is carried out relative to the load 10 to be packaged in particular in order to apply the strip 1 to the load 10 and the strip 1 is rigidly associated on itself and / or on the load 10 (FIG. 7).

Selon une première variante, on part d'une bande (à simple épaisseur, ceci comprenant aussi le cas d'une gaine à plat, ainsi qu'on l'a déjà vu) dépourvue de renfort et on la dévide (plus généralement elle est l'objet d'une alimentation) pour successivement réaliser d'abord notamment en continu la (ou les) zone(s) de renfort longitudinale 2, puis appliquer la bande ainsi renforcée sur la charge 10 (partie gauche supérieure figure 7). Selon une seconde variante, on part d'une bande à renfort longitudinal 1 déjà réalisée et notamment enroulée en bobine, on la prélève, notamment on la dévide, et on l'applique sur la charge 10 comme précédemment (partie droite supérieure figure 7). Par conséquent, l'étape de réalisation de la zone de renfort longitudinale 2 est soit intégrée au procédé d'emballage, soit distincte, le procédé d'emballage mettant alors en oeuvre une bande 1 renforcée préparée séparément et présentée, par exemple, en bobine.According to a first variant, we start from a strip (simple thickness, this also comprising the case of a flat sheath, as we have already seen) without reinforcement and it is unwound (more generally it is the object of a feeding) to successively firstly realize in particular continuously (or the) zone (s) of longitudinal reinforcement 2, then apply the strip thus reinforced on the load 10 (upper left part FIG. 7). According to a second variant, one starts from a strip with longitudinal reinforcement 1 already produced and in particular wound in a reel, it is taken up, in particular it is unwound, and it is applied to the load 10 as before (upper right part of FIG. 7) . Consequently, the step of producing the longitudinal reinforcement zone 2 is either integrated into the packaging process, or separate, the packaging process then using a reinforced strip 1 prepared separately and presented, for example, on a reel. .

Selon une première forme de réalisation possible, on utilise un film en matière plastique étirable à froid et on étire la bande 1 longitudinalement lors de son application sur la charge 10 , notamment soit conventionnellement par la charge 10 elle-même (étirage classique) , soit par pré-étirage (l'étirage étant alors dissocié de la charge et effectué juste avant l'application) (partie inférieure gauche figure 7).According to a first possible embodiment, a cold-stretchable plastic film is used and the strip 1 is stretched longitudinally during its application to the load 10, in particular either conventionally by the load 10 itself (conventional stretching), or by pre-stretching (the stretching is then dissociated from the load and carried out just before application) (part lower left figure 7).

Selon une seconde forme de réalisation possible, on utilise un film en matière plastique thermorétractable et on chauffe la bande 1 une fois appliquée sur la charge 10, (partie inférieure droite figure 7).According to a second possible embodiment, a film of heat-shrinkable plastic is used and the strip 1 is heated once applied to the load 10, (lower right part in FIG. 7).

Dans un cas comme dans l'autre, cette étape du procédé d'emballage a pour effet d'assurer l'application serrée de la bande 1 sur la charge 10 et, de plus l'association rigide de la zone de renfort longitudinale 2 au reste de la bande 1.In one case as in the other, this step of the packaging process has the effect of ensuring the tight application of the strip 1 on the load 10 and, moreover, the rigid association of the longitudinal reinforcement zone 2 with the rest of band 1.

Enfin, selon une autre caractéristique du procédé d'emballage selon l'invention mettant en oeuvre la caractéristique de la bande 1 à comporter une zone de renfort longitudinale 2 ou à être dépourvue d'une telle zone, le procédé d'emballage comporte, optionnellement et si nécessaire, au moins une phase pendant laquelle on réalise une zone de renfort 2 et au moins une phase pendant laquelle on ne réalise pas une telle zone 2, la bande délivrée et utilisée dans cette phase étant alors dépourvue d'une telle zone de renfort 2, la bande étant continue entre un tronçon où elle comporte une zone de renfort 2 et un tronçon où elle est dépourvue d'une telle zone.Finally, according to another characteristic of the packaging method according to the invention implementing the characteristic of the strip 1 to include a longitudinal reinforcement zone 2 or to be devoid of such a zone, the packaging method comprises, optionally and if necessary, at least one phase during which a reinforcement zone 2 is produced and at least one phase during which such a zone 2 is not produced, the strip delivered and used in this phase then being devoid of such a zone of reinforcement 2, the strip being continuous between a section where it includes a reinforcement zone 2 and a section where it does not have such a zone.

Naturellement et pour autant que cela soit possible et souhaitable, les différentes variantes décrites peuvent être combinées les unes avec les autres.Naturally and as far as possible and desirable, the different variants described can be combined with one another.

Un tel emballage a pour caractéristique que le renfort est longitudinal, intégré à la bande 1 elle-même, qu'il peut être placé en tout endroit souhaité de la charge 10, y compris par exemple sur une arête ou un coin grâce à la présence de la partie de bande 1 dépourvue de zone de renfort 2 placée de part et d'autre de cette zone 2 et formant support. Enfin, la zone de renfort 2 permet de mettre à profit les fonctions remplies par ce renfort (force de serrage, antichocs, etc...)Such packaging has the characteristic that the reinforcement is longitudinal, integrated into the strip 1 itself, that it can be placed in any desired location of the load 10, including for example on an edge or a corner thanks to the presence of the strip part 1 devoid of reinforcement zone 2 placed on either side of this zone 2 and forming a support. Finally, the reinforcement zone 2 makes it possible to take advantage of the functions fulfilled by this reinforcement (clamping force, shockproof, etc.)

L'invention concerne, ensuite, un procédé pour réaliser une telle zone de renfort longitudinale 2 sur une bande.The invention then relates to a method for producing such a longitudinal reinforcement zone 2 on a strip.

Le procédé peut être discontinu et concerner un tronçon longitudinal limité et fini de bande. Dans ce cas, le procédé consiste à réaliser un pliage longitudinal de la bande généralement progressivement en sens transversal et ceci pour tout le tronçon longitudinal considéré.The process can be discontinuous and concern a limited and finished longitudinal section of strip. In this case, the method consists in performing a longitudinal folding of the strip generally progressively in transverse direction and this for the entire longitudinal section considered.

Le procédé peut, préférentiellement, être continu et concerner un tronçon de bande de très grande longueur ou illimité ou continu.The process may preferably be continuous and relate to a section of strip of very great length or unlimited or continuous.

Dans ce dernier cas, selon une première variante, on peut partir d'une bande à simple épaisseur, continue dans son ensemble, dépourvue de renfort ; on fait défiler cette bande en sens longitudinal selon un mouvement relatif et dans au moins une phase de pliage longitudinal, on amène progressivement en sens longitudinal et/ou en sens transversal au moins deux zones longitudinales de pliage 3A, 3B adjacentes de la bande à venir à recouvrement à plat l'une sur l'autre pour former au moins un pli longitudinal 7 constituant au moins une partie de zone de renfort longitudinale 2. Cette première variante est compatible avec le fait que la bande simple épaisseur est réalisée éventuellement à partir d'une gaine fendue longitudinalement, cette étape préalable étant sans incidence sur le procédé ultérieur selon l'invention.In the latter case, according to a first variant, it is possible to start from a single-thickness strip, continuous as a whole, devoid of reinforcement; this strip is made to run in a longitudinal direction in a relative movement and in at least one longitudinal folding phase, at least two longitudinal folding areas 3A, 3B adjacent to the next strip are brought progressively in the longitudinal direction and / or in the transverse direction overlapping flat one on top of the other to form at least one longitudinal fold 7 constituting at least one part of longitudinal reinforcement zone 2. This first variant is compatible with the fact that the single thickness strip is optionally made from 'a sheath split longitudinally, this prior step having no effect on the subsequent process according to the invention.

Selon une seconde variante, on part d'une bande en forme de gaine à soufflet longitudinal, continue dans son ensemble ; on fait défiler la bande en sens longitudinal selon un mouvement relatif et dans au moins une phase d'ouverture longitudinale, on fend la gaine longitudinalement et on ouvre la gaine en sens transversal tout en gardant le soufflet, au moins partiellement, de manière que la gaine ouverte forme une bande à plat dont le soufflet longitudinal constitue la zone de renfort longitudinale 2. Cette seconde variante met à profit l'existence connue de gaines conventionnelles à soufflets.According to a second variant, one starts from a strip in the form of a sheath with longitudinal bellows, continuous as a whole; the strip is scrolled in a longitudinal direction in a relative movement and in at least one longitudinal opening phase, the sheath is split longitudinally and the sheath is opened in the transverse direction while keeping the bellows, at least partially, so that the open sheath forms a flat strip whose longitudinal bellows constitutes the longitudinal reinforcement zone 2. This second variant takes advantage of the known existence of conventional bellows sheaths.

Dans le texte, en particulier par la suite, on considère que le mot bande couvre les deux variantes (bande simple épaisseur ou gaine).In the text, in particular later, it is considered that the word strip covers the two variants (single thickness strip or sheath).

Dans la première variante, la zone de renfort longitudinale 2 est réalisée essentiellement lors de la phase de pliage longitudinal et, dans la deuxième variante, lors de la phase d'ouverture et de mise à plat.In the first variant, the longitudinal reinforcement zone 2 is produced essentially during the longitudinal folding phase and, in the second variant, during the opening and flattening phase.

Préférentiellement, pendant et au moins immédiatement après la phase de pliage longitudinal ou après la phase d'ouverture longitudinale on maintient la bande 1 à plat sous tension en sens longitudinal. Cette tension vise à préserver l'intégrité de la zone de renfort longitudinale 2 sans la nécessité de moyens positifs de maintien, notamment de solidarisation (tels que soudure).Preferably, during and at least immediately after the longitudinal folding phase or after the longitudinal opening phase, the strip 1 is kept flat under tension in the longitudinal direction. This tension is aimed at preserving the integrity of the longitudinal reinforcement zone 2 without the need for positive holding means, in particular for joining together (such as welding).

Dans une forme possible de mise en oeuvre de l'invention, après la dernière phase de pliage longitudinal ou d'ouverture longitudinale, on applique et on maintient appliquée la bande 1 à zone de renfort longitudinale 2 sur un support. Par exemple, on utilise comme support une bobine sur laquelle la bande 1 à zone de renfort longitudinale 2 est enroulée, ou au moins un rouleau mobile d'une machine mettant en oeuvre la bande 1 à renfort longitudinal et sur lequel défile cette bande, ou une charge 10 devant être recouverte avec la bande 1 à renfort longitudinal notamment une charge à emballer.In one possible embodiment of the invention, after the last phase of longitudinal folding or longitudinal opening, the strip 1 is applied and kept applied to the longitudinal reinforcement zone 2 on a support. For example, a coil is used as a support on which the strip 1 with longitudinal reinforcement zone 2 is wound, or at least one movable roller of a machine implementing the strip 1 with longitudinal reinforcement and on which this strip passes, or a load 10 to be covered with the strip 1 with longitudinal reinforcement, in particular a load to be packaged.

Dans une autre forme de mise en oeuvre, ainsi que déjà décrit, la bande à renfort 1 est, dès la zone de renfort longitudinale 2 constituée, appliquée sur une charge 10 en vue de l'emballage.In another form of implementation, as already described, the reinforcing strip 1 is, from the longitudinal reinforcing zone 2 formed, applied to a load 10 for packaging.

Dans une autre forme de mise en oeuvre, on procède à une solidarisation, notamment au soudage, des zones longitudinales de pliage 3A, 3B de la zone de renfort longitudinale 2, par point, par ligne ou par zone, de façon continue ou discontinue, longitudinalement et/ou transversalement.In another form of implementation, the longitudinal folding zones 3A, 3B of the longitudinal reinforcing zone 2 are joined, in particular by welding, continuously or discontinuously, by point, by line or by zone, longitudinally and / or transversely.

Selon la nécessité, on réalise plusieurs phases de pliage ou de phases d'ouverture simultanément ou successivement pour une même zone longitudinale de la bande 1 et/ou ou pour des zones différentes.Depending on the need, several folding phases or opening phases are carried out simultaneously or successively for the same longitudinal zone of the strip 1 and / or or for different zones.

Cela conduit à réaliser plusieurs zones de renfort longitudinales 2 en parallèle et/ou en série ainsi qu'il a été déjà décrit, simultanément ou successivement.This leads to producing several longitudinal reinforcement zones 2 in parallel and / or in series as has already been described, simultaneously or successively.

Selon une variante de réalisation, optionnelle, on insère entre deux zones longitudinales de pliage 3A, 3B un corps 9 incorporé à la zone de renfort longitudinale 2 et notamment on envoie le corps 9 de manière à l'engager entre les deux zones longitudinales de pliage 3A, 3B venant à recouvrement. Le mode d'insertion dépend, notamment, de la nature du corps 9, par exemple de son état fluide ou solide. Dans le cas d'un corps 9 fluide, cette variante est préférentiellement combinée à la forme de réalisation avec solidarisation de la zone de renfort longitudinale 2 afin que celle-ci forme une cavité fermée susceptible de maintenir et d'enfermer le corps 9 fluide.According to an optional variant, a body 9 incorporated between two longitudinal folding zones 3A, 3B incorporated into the longitudinal reinforcement zone 2 and in particular the body 9 is sent so as to engage it between the two longitudinal folding zones 3A, 3B overlapping. The mode of insertion depends, in particular, on the nature of the body 9, for example on its fluid or solid state. In the case of a fluid body 9, this variant is preferably combined with the embodiment with the joining of the longitudinal reinforcing zone 2 so that it forms a closed cavity capable of holding and enclosing the fluid body 9.

Selon une variante de réalisation, optionnelle, on effectue sur la zone de renfort longitudinale 2 une ou des lignes (ou zones) continues ou non d'affaiblissement, notamment par poinçonnage.According to an alternative embodiment, optional, is carried out on the longitudinal reinforcement zone 2 one or more lines (or zones) continuous or not of weakening, in particular by punching.

Enfin et plus généralement, on associe au procédé spécifique de réalisation de la zone de renfort longitudinale 2 des procédés ou étapes de procédés connus en soi pour le façonnage, le traitement, l'agencement, etc... des bandes ou gaines, notamment la coupe ou le soudage transversal, le pliage transversal, l'étirage (ou le pré-étirage), le traitement thermique.Finally and more generally, the specific method for producing the longitudinal reinforcement zone 2 is associated with methods or steps of methods known per se for the shaping, treatment, arrangement, etc. of strips or sheaths, in particular the cutting or transverse welding, transverse folding, stretching (or pre-stretching), heat treatment.

S'agissant plus spécifiquement de la forme de réalisation par pliage longitudinal, pour amener deux zones longitudinales de pliage 3A, 3B à venir en recouvrement, en premier lieu, on fait défiler, de façon relative, d'une part, une première zone longitudinale de la bande, notamment au moins une partie d'une première zone longitudinale de pliage 3A, longitudinalement le long et contre un premier patin 11 longitudinalement étendu et limité situé sur une première surface 6A de la bande 1 et, d'autre part, une seconde zone longitudinale de la bande, notamment au moins une partie d'une seconde zone longitudinale de pliage 3B, longitudinalement le long et contre un second patin 12 longitudinalement étendu et limité situé sur une seconde surface 6B de la bande 1 ; et, en combinaison, en second lieu, on dispose les premier et second patins 11, 12, de manière, d'une part, qu'au début de la phase de pliage longitudinal le premier et le second patins 11, 12 soient placés de part et d'autre de la bande 1 en étant respectivement dirigés vers sa première surface 6A et sa seconde surface 6B et, d'autre part, qu'à la fin de la phase de pliage longitudinal le premier et le second patins 11, 12 soient placés de part et d'autre d'au moins une partie de l'une des zones longitudinales de pliage en étant respectivement dirigés vers la seconde surface 6B et la première surface 6A de la bande 1.More specifically with regard to the embodiment by longitudinal folding, in order to bring two longitudinal folding zones 3A, 3B to overlap, firstly, a first longitudinal zone is scrolled, on the one hand of the strip, in particular at least part of a first longitudinal folding zone 3A, longitudinally along and against a first pad 11 longitudinally extended and limited situated on a first surface 6A of the strip 1 and, on the other hand, a second longitudinal zone of the strip, in particular at least part of a second longitudinal folding zone 3B, longitudinally along and against a second pad 12 longitudinally extended and limited situated on a second surface 6B of the strip 1; and, in combination, secondly, the first and second pads 11, 12 are arranged, so, on the one hand, that at the start of the longitudinal folding phase, the first and the second pads 11, 12 are placed on either side of the strip 1, being directed respectively towards its first surface 6A and its second surface 6B and, on the other hand, that at the end of the longitudinal folding phase the first and the second pads 11, 12 are placed on either side of at least part of one of the longitudinal zones folding, being directed respectively to the second surface 6B and the first surface 6A of the strip 1.

S'agissant plus spécifiquement de la forme de réalisation par ouverture, on fend longitudinalement la gaine à soufflet, en gardant le soufflet et on dispose la gaine et le soufflet à plat en ouvrant la gaine ainsi fendue. On place la fente à l'endroit souhaité compte tenu de la position finale recherchée pour la zone de renfort longitudinale 2.As regards more specifically the embodiment by opening, the bellows sheath is split longitudinally, keeping the bellows and the sheath and the bellows are placed flat by opening the sheath thus split. The slot is placed at the desired location taking into account the final position sought for the longitudinal reinforcement zone 2.

L'invention concerne également un dispositif pour réaliser une zone de renfort longitudinale 2 sur une bande. Un tel dispositif est généralement caractérisé par le fait qu'il permet ou qu'il est agencé pour assurer la mise en oeuvre du procédé décrit précédémment.The invention also relates to a device for producing a longitudinal reinforcement zone 2 on a strip. Such a device is generally characterized by the fact that it allows or is arranged to ensure the implementation of the method described previously.

Dans une forme possible de réalisation, le dispositif est conçu pour une mise en oeuvre discontinue et, à cet effet, comporte des moyens de saisie d'un tronçon de bande dans différentes zones espacées longitudinalement et transversalement -tels que pinces, ventouses de succion- et des moyens d'entraînement à déplacement relatif de ces moyens de saisie -tels que chaînes sans fin ou vérin- aptes à les amener dans une position où les zones longitudinales de pliage 3A, 3B ... 3N sont superposées.In a possible embodiment, the device is designed for a discontinuous implementation and, for this purpose, comprises means for gripping a section of strip in different zones spaced longitudinally and transversely - such as pliers, suction cups - and drive means with relative movement of these gripping means - such as endless chains or jacks - capable of bringing them into a position where the longitudinal folding zones 3A, 3B ... 3N are superimposed.

Dans une autre forme de réalisation, préférentielle, le dispositif est conçu pour une mise en oeuvre en continu.In another preferred embodiment, the device is designed for continuous use.

On décrit maintenant un tel dispositif dans le cas de la forme de réalisation par pliage longitudinal, en se référant aux figures 9 à 13. Un tel dispositif comporte des moyens d'amenée en continu de bande dépourvue de renfort, d'entraînement en défilement longitudinal de cette bande et d'évacuation de la bande 1 à renfort ; préférentiellement des moyens pour maintenir la bande sous tension en sens longitudinal ; au moins un premier et un second patins 11, 12 longitudinalement étendus et limités qui, dans leur état actif, ont leurs parties extrêmes avals 13, 14 au moins partiellement superposées et écartées l'une de l'autre dans la direction perpendiculaire à leur plan, ayant pour fonction de conformer la bande qui glisse sur eux de manière que les parties avals 13, 14 superposées et écartées réalisent le recouvrement des zones longitudinales de pliage 3A, 3B. Ces patins 11, 12 sont agencés de manière que leurs parties extrêmes amonts 15, 16 soient écartées transversalement l'une de l'autre. De plus, les patins 11, 12 sont agencés pour se rapprocher transversalement l'un de l'autre de leurs parties extrêmes amonts 15, 16 à leurs parties extrêmes avals 13, 14. Au moins un patin est mobile, notamment dans son propre plan, de manière qu'au moins sa partie extrême aval 13, 14 puisse être écartée de la partie extrême aval 14, 13 de l'autre patin 12, 11, des moyens d'entraînement 17 étant prévus pour déplacer le patin mobile. Par exemple, un patin est monté mobile à pivotement autour d'un axe 18 perpendiculaire à son propre plan situé à l'endroit ou au voisinage de sa partie extrême amont 15, 16, les moyens d'entraînement étant constitués notamment par un vérin notamment pneumatique.We will now describe such a device in the case of the embodiment by longitudinal folding, with reference to FIGS. 9 to 13. Such a device comprises means for continuously feeding a strip without reinforcement, for driving in longitudinal movement. of this strip and of evacuation of the strip 1 with reinforcement; preferably means for keeping the strip under tension in the longitudinal direction; at least first and second runners 11, 12 longitudinally extended and limited which, in their active state, have their downstream end portions 13, 14 at least partially superimposed and spaced from each other in the direction perpendicular to their plane, having the function of conforming the strip which slides over them so that the downstream parts 13, 14 superimposed and spaced out overlap the longitudinal folding zones 3A, 3B. These pads 11, 12 are arranged so that their upstream end portions 15, 16 are spaced transversely from one another. In addition, the pads 11, 12 are arranged to move transversely towards each other from their upstream end portions 15, 16 to their downstream end portions 13, 14. At least one pad is movable, in particular in its own plane , so that at least its downstream end portion 13, 14 can be moved away from the downstream end portion 14, 13 from the other pad 12, 11, drive means 17 being provided for moving the movable pad. For example, a shoe is mounted so as to pivot about an axis 18 perpendicular to its own plane situated at the place or in the vicinity of its upstream end part 15, 16, the drive means being constituted in particular by a jack in particular pneumatic.

Selon une forme de réalisation possible, un patin 11, 12 se présente sous la forme d'une lame agencée pour que la bande puisse glisser sur sa surface, cette lame étant limitée par un bord longitudinal d'attaque 19 notamment effilé mais non coupant sur lequel vient s'appliquer progressivement et défiler la bande pour former un pli longitudinal 7.According to a possible embodiment, a shoe 11, 12 is in the form of a blade arranged so that the strip can slide on its surface, this blade being limited by a longitudinal leading edge 19 in particular tapered but not cutting on which comes to be applied gradually and scroll the strip to form a longitudinal fold 7.

Selon une autre forme de réalisation possible, pouvant être combinée à la précédente, un patin se présente sous la forme d'une lame agencée pour que la bande puisse glisser sur sa surface, cette lame comportant une saillie longitudinale 20 par rapport à son plan, servant de conformateur.According to another possible embodiment, which can be combined with the previous one, a shoe is in the form of a blade arranged so that the strip can slide on its surface, this blade comprising a longitudinal projection 20 relative to its plane, serving as a conformator.

Enfin, selon une variante optionnelle, le dispositif comporte des moyens 21 pour insérer un corps 9 entre deux zones longitudinales de pliage 3A, 3B, ces moyens consistant, notamment, en un patin avec lequel coopère ledit corps 9, ce patin 21 ayant pour fonction de guider ledit corps 9 pour l'amener entre les zones longitudinales de pliage 3A, 3B.Finally, according to an optional variant, the device comprises means 21 for inserting a body 9 between two longitudinal folding zones 3A, 3B, these means consisting, in particular, of a shoe with which said body 9 cooperates, this shoe 21 having the function guide said body 9 to bring it between the longitudinal folding zones 3A, 3B.

Dans le cas des figures 9 et 10, il est prévu un patin central, fixe, avec saillie longitudinale 20 et, de part et d'autre, deux patins mobiles latéraux du type à bord d'attaque 29. Le patin central fixe est situé du côté d'une première surface 6A de la bande et les deux autres patins mobiles du côté d'une seconde surface 6B.In the case of FIGS. 9 and 10, a central, fixed pad is provided, with longitudinal projection 20 and, on either side, two lateral movable pads of the leading edge type 29. The fixed central pad is located on the side of a first surface 6A of the strip and the other two movable pads of the side of a second surface 6B.

Au repos (c'est-à-dire en l'absence de formation de zone de renfort longitudinale 2) les patins latéraux sont écartés l'un de l'autre, parallèles entre eux, sans action sur la bande de film (figure 9).At rest (that is to say in the absence of formation of longitudinal reinforcement zone 2) the lateral pads are spaced from one another, parallel to each other, without action on the film strip (FIG. 9 ).

Pour passer en position opératoire (figure 10), on commande les moyens d'entraînement 17, tels que les vérins pneumatiques à l'opposé des axes 18 jusqu'à amener les patins latéraux au regard et sur le patin central, ces patins latéraux étant soit juxtaposés en sens transversal, soit même superposés (cas de figure). Lors de leur pivotement entre la position de repos et la position opératoire, les patins latéraux provoquent le déplacement souhaité des zones longitudinales de pliage 3A, 3B pour réaliser la zone de renfort longitudinale 2 souhaitée.To move into the operating position (FIG. 10), the drive means 17 are controlled, such as the pneumatic cylinders opposite the axes 18 until the lateral runners are brought into view and on the central runner, these lateral runners being either juxtaposed in transverse direction, or even superimposed (case). During their pivoting between the rest position and the operating position, the lateral pads cause the desired displacement of the longitudinal folding zones 3A, 3B in order to produce the desired longitudinal reinforcement zone 2.

Dans le cas de la figure 11, le dispositif comporte des moyens 21 pour insérér un corps 9 en forme de bande d'insert. Ces moyens comportent un support 22 pour cette bande d'insert, un rouleau de renvoi 23 pour amener la bande d'insert coplanaire au patin central et le patin central appliquant la bande d'insert sur les parties longitudinales 3A, 3B, c'est-à-dire dans la zone de renfort longitudinale 2.In the case of FIG. 11, the device comprises means 21 for inserting a body 9 in the form of an insert strip. These means comprise a support 22 for this insert strip, a deflection roller 23 for bringing the coplanar insert strip to the central shoe and the central shoe applying the insert strip to the longitudinal parts 3A, 3B, this is i.e. in the longitudinal reinforcement zone 2.

Dans le cas des figures 12 et 13, le dispositif comporte des moyens 21 pour insérer un corps 9 fluide, notamment gazeux. Ce corps 9 peut être introduit par des trous d'amenée 24 ménagés dans la saillie 20 en communication avec des trous de sortie 25 de la lame du patin situés dans zone de renfort 2. Ce dispositif peut alors être associé à des moyens de solidarisation, notamment de soudage, de la zone de renfort 2.In the case of Figures 12 and 13, the device comprises means 21 for inserting a fluid body 9, in particular gaseous. This body 9 can be introduced through feed holes 24 formed in the projection 20 in communication with outlet holes 25 of the blade of the skate located in the reinforcement zone 2. This device can then be associated with fastening means, especially welding, of the reinforcement zone 2.

Dans le cas de la forme de réalisation par ouverture longitudinale, le dispositif comporte des moyens d'amenée en continu de bande sous forme de gaine à soufflet, d'entraînement en défilement longitudinal et d'évacuation de la bande 1 à renfort réalisée ; des moyens pour fendre longitudinalement la gaine et des moyens pour ouvrir la gaine tout en maintenant le soufflet au moins partiellement formé.In the case of the embodiment by longitudinal opening, the device comprises means for continuously feeding the strip in the form of a bellows sheath, for driving in longitudinal movement and for evacuating the strip 1 with reinforcement produced; means for longitudinally splitting the sheath and means for opening the sheath while keeping the bellows at least partially formed.

Les moyens pour fendre la gaine sont constitués par exemple par une lame tranchante. Les moyens pour ouvrir la gaine sont constitués, par exemple par des pinces à ouverture commandée portées par des moyens d'entraînement tels que chaîne sans fin, vérin, etc... ou encore par des bandes sans fin orientées de façon divergentes pour ouvrir la gaine.The means for splitting the sheath are constituted for example by a sharp blade. The means for opening the sheath are constituted, for example by clamps with controlled opening carried by drive means such as endless chain, jack, etc. or also by endless bands oriented in divergent manner to open the sheath.

Il doit être souligné que les dispositifs décrits ne sont nullement limitatifs, qu'ils peuvent comporter de nombreuses variantes, que certaines parties d'entre eux peuvent être à la portée de l'homme du métier dans le domaine de l'emballage.It should be emphasized that the devices described are in no way limiting, that they can include numerous variants, that certain parts of them can be within the reach of those skilled in the art in the field of packaging.

L'invention concerne, également, comme premier cas particulier d'emballage, l'emballage d'une charge de forme générale cylindrique, par exemple circulaire, notamment avec son axe de révolution placé horizontalement, cette charge étant notamment une bobine de papier 25.The invention also relates, as a first particular case of packaging, to the packaging of a load of generally cylindrical shape, for example circular, in particular with its axis of revolution placed horizontally, this load being in particular a reel of paper 25.

Dans cette application particulière, le film utilisé est un film étirable.In this particular application, the film used is a stretch film.

Le procédé d'emballage d'une telle bobine de papier 25 est tel que généralement dans au moins une première phase on dévide la bande sans réaliser de renfort sur celle-ci et on applique cette bande sans renfort sur au moins une partie de la surface cylindrique 27 de la charge 25 et, dans au moins une deuxième phase, on dévide la bande et on réalise sur celle-ci une zone de renfort longitudinale 2 (ou en variante on utilise directement une bande avec renfort longitudinal pré-formé) et on applique cette bande avec renfort 1 avec sa zone de renfort longitudinale 2 sur l'arête d'extrémité 28 de la surface cylindrique 27 ; au moins pendant la ou les deuxièmes phases, on étire ou pré-étire le film constituant la bande 1, ce qui a pour effet de provoquer l'application de la bande 1 sur la ou les faces d'extrémité 29 de la charge 25 ; on coupe transversalement la bande de film 1 et on solidarise sa partie extrême terminale à la charge 25 et/ou à la partie intermédiaire de la bande de film 1 déjà appliquée sur la charge 25.The method of packaging such a reel of paper 25 is such that generally, in at least a first phase, the strip is unwound without making reinforcement thereon and this strip is applied without reinforcement to at least part of the surface. cylindrical 27 of the load 25 and, in at least a second phase, the strip is unwound and a longitudinal reinforcement zone 2 is produced thereon (or alternatively a strip with pre-formed longitudinal reinforcement is used directly) and applies this strip with reinforcement 1 with its longitudinal reinforcement zone 2 to the end edge 28 of the cylindrical surface 27; at least during the second phase or phases, the film constituting the strip 1 is stretched or pre-stretched, which has the effect of causing the strip 1 to be applied to the end face (s) 29 of the load 25; the film strip 1 is cut transversely and its end end part is secured to the load 25 and / or to the intermediate part of the film strip 1 already applied to the load 25.

Un tel procédé comporte, par exemple, une première phase initiale, suivie d'une deuxième phase concernant une première arête d'extrémité 28, suivie d'une première phase intermédiaire, suivie d'une deuxième phase concernant une seconde arête d'extrémité 28, suivie d'une première phase terminale. Préférentiellement, on étire ou pré-étire également le film pendant la ou les premières phases. La zone de renfort longitudinale 2 réalisée pendant la deuxième phase est préférentiellement médiane. Par exemple, on réalise une zone de renfort longitudinale 2 étagée comportant deux franges latérales à trois couches et au moins une zone centrale à au moins cinq couches. Compte tenu de l'application de la bande 1 sur la charge 25 résultant de l'étirage, dans une deuxième phase on dévide la bande 1 dans un plan parallèle à l'axe 26 de la charge 25. A titre indicatif, Dans une deuxième phase, on réduit la laize de la bande de film 1 à une valeur de l'ordre du tiers ou du quart de la laize de la bande sans renfort.Such a method comprises, for example, a first initial phase, followed by a second phase relating to a first end edge 28, followed by a first intermediate phase, followed by a second phase relating to a second end edge 28 , followed by a first terminal phase. Preferably, the film is also stretched or pre-stretched during the first phase or phases. The longitudinal reinforcement zone 2 produced during the second phase is preferably median. For example, a stepped longitudinal reinforcement zone 2 is produced comprising two lateral fringes with three layers and at least one central zone with at least five layers. Taking into account the application of the strip 1 on the load 25 resulting from the stretching, in a second phase the strip 1 is unwound in a plane parallel to the axis 26 of the load 25. For information, In a second phase, the width of the film strip 1 is reduced to a value of the order of a third or a quarter of the width of the strip without reinforcement.

Le procédé qui vient d'être décrit peut faire l'objet de nombreuses variantes de réalisation qui entrent dans le concept inventif décrit précédemment. Par exemple, la bande de film peut n'être appliquée que sur l'une et/ou l'autre des arêtes 28 ; on peut entre chaque tour de bande la couper et la solidariser ; le banderolage de la surface cylindrique 27 peut être à couche unique ou à plusieurs couches, droit ou hélicoïdal, avec une bande dont la laize utile est égale à la longueur axiale de la bobine de papier 25 ou égale à une fraction de celle-ci seulement ; le banderolage de la surface cylindre 27 peut être fait avec une bande à renfort 1 ; la bande de film peut recouvrir tout ou seulement une partie, le cas échéant très faible, des faces d'extrémité 29.The process which has just been described can be the subject of numerous variant embodiments which fall within the inventive concept described above. For example, the film strip may be applied only to one and / or the other of the edges 28; between each turn of the strip, it can be cut and joined; the wrapping of the cylindrical surface 27 can be single-layered or multi-layered, straight or helical, with a strip whose useful width is equal to the axial length of the paper reel 25 or equal to only a fraction thereof ; the wrapping of the cylinder surface 27 can be done with a reinforcing strip 1; the film strip may cover all or only a part, if necessary very small, of the end faces 29.

Selon une variante, le procédé ne concerne que la mise en place de la bande avec renfort sur l'une ou, préférentiellement, les deux arêtes 28, sans que la surface cylindrique 27 ne soit recouverte.According to a variant, the method only relates to the positioning of the strip with reinforcement on one or, preferably, the two edges 28, without the cylindrical surface 27 being covered.

Selon une autre variante, le film utilisé est thermorétractable et le procédé ne comporte pas de phase d'étirage ou de pré-étirage mais une phase finale de chauffage.According to another variant, the film used is heat-shrinkable and the process does not include a stretching or pre-stretching phase but a final heating phase.

Il doit être noté que l'application d'une bande de film simple épaisseur sur une bobine de papier 25 est un procédé généralement connu en soi, de même qu'une installation pour la mise en oeuvre de ce procédé. Les éléments constitutifs généraux de ce procédé et cette installation étant connus et à la portée de l'homme du métier ne sont pas décrits plus avant ici. L'invention concerne donc la mise en oeuvre de ce procédé et dispositif avec une bande à renfort comme indiqué.It should be noted that applying a single layer of film to a reel of paper 25 is a generally known per se, as well as an installation for the implementation of this process. The general constituent elements of this process and this installation being known and within the reach of those skilled in the art are not described further here. The invention therefore relates to the implementation of this method and device with a reinforcing strip as indicated.

L'invention concerne également une bobine de papier 25 emballée conformément à ce procédé et qui comporte donc au moins un tronçon de bande de film 1 avec une zone de renfort longitudinale 2 sur au moins une arête d'extrémité 28. Cette bande est appliquée sur la bobine par étirage ou thermorétraction.The invention also relates to a reel of paper 25 packaged in accordance with this method and which therefore comprises at least one section of film strip 1 with a longitudinal reinforcement zone 2 on at least one end edge 28. This strip is applied to the coil by stretching or heat shrinking.

L'invention concerne également une installation pour la mise en oeuvre de ce procédé.The invention also relates to an installation for implementing this method.

Une telle installation comporte des moyens support 30 d'une bobine de bande de film à axe horizontal, des moyens support 31 motorisés de la charge 25, aptes à permettre son pivotement autour de son axe de révolution 26 horizontal ; un dispositif 32 pour réaliser en continu une zone de renfort longitudinale 2 sur la bande de film, interposé entre les moyens support 30, respectivement la bobine de bande de film elle-même, et les moyens support 31, respectivement la charge 25 elle-meme, la bande de film passant à défilement dans ce dispositif 32 ; des moyens de coupe transversale 33 de la bande de film ; des moyens de solidarisation 34 de la bande de film sur elle-même et/ou sur la charge 25 ; des moyens pour assurer un coulissement relatif horizontal du dispositif 32 et des moyens support 31 de charge parallèlement à l'axe 26 ; et des moyens d'étirage ou de pré-étirage 35 du film.Such an installation comprises support means 30 for a reel of film strip with a horizontal axis, motorized support means 31 for the load 25, capable of allowing it to pivot about its horizontal axis of revolution 26; a device 32 for continuously producing a longitudinal reinforcement zone 2 on the film strip, interposed between the support means 30, respectively the film strip reel itself, and the support means 31, respectively the load 25 itself , the strip of film passing in advance through this device 32; means for cross-cutting 33 of the film strip; means 34 for securing the film strip to itself and / or to the load 25; means for ensuring horizontal relative sliding of the device 32 and support means 31 for charging parallel to the axis 26; and means for stretching or pre-stretching the film.

En variante, une telle installation comporte, également des moyens de commande du dispositif 32 notamment couplés aux moyens pour assurer le coulissement relatif dudit dispositif 32 et des moyens support 31 de charge, de manière que ledit dispositif 32 soit actif lorsque les moyens pour assurer de coulissement relatif amènent la bande de film au droit d'une arête d'extrémité 28. Les moyens de coupe transversale 33 et les moyens de solidarisation 34, constitués par au moins un mors de soudage, sont situés d'amont en aval à proximité des moyens support 31 de charge, respectivement de la charge 25.As a variant, such an installation also includes means for controlling the device 32, in particular coupled to the means for ensuring the relative sliding of said device 32 and support means 31 for charging, so that said device 32 is active when the means for ensuring relative sliding bring the film strip to the right of an end edge 28. The transverse cutting means 33 and the securing means 34, constituted by at least one welding jaw, are located from upstream to downstream near the load support means 31, respectively load 25.

Préférentiellement, les moyens d'étirage 35 sont des moyens de pré-étirage du film placés en aval du dispositif 32 pour réaliser le renfort.Preferably, the stretching means 35 are means for pre-stretching the film placed downstream of the device 32 to produce the reinforcement.

En fonctionnement, l'installation peut être agencée pour permettre l'emballage de tout ou partie de la surface cylindrique 27, la bande étant alors sans renfort, le dispositif 32 étant inactif, et le dispositif 32 étant actif lorsque l'on veut poser la bande à renfort 1 sur l'arête 28.In operation, the installation can be arranged to allow the packaging of all or part of the cylindrical surface 27, the strip then being without reinforcement, the device 32 being inactive, and the device 32 being active when it is desired to place the reinforcement strip 1 on edge 28.

Cette installation peut également faire l'objet de variantes. Par exemple, elle peut comporter deux bandes à renfort placées en regard de chaque arête 28, au lieu d'une bande unique déplacée à coulissement le long de l'axe 26. Elle peut comporter des bandes distinctes pour le recouvrement de la surface cylindrique 26 et d'une arête 28. Le recouvrement de la surface cylindrique peut également mettre en oeuvre la bande à renfort 1, le dispositif 32 étant actif en permanence. L'installation peut mettre en oeuvre un film thermorétractable, les moyens d'étirage ou de pré-étirage 35 étant superposés et l'installation comportant des moyens de chauffage en vue de la thermorétraction du film.This installation can also be subject to variants. For example, it may comprise two reinforcement bands placed opposite each edge 28, instead of a single band displaced slidingly along the axis 26. It may comprise separate bands for covering the cylindrical surface 26 and an edge 28. The covering of the cylindrical surface can also use the reinforcing strip 1, the device 32 being permanently active. The installation can use a heat-shrinkable film, the stretching or pre-stretching means 35 being superimposed and the installation comprising heating means for heat-shrinking the film.

L'invention concerne, enfin, comme deuxième cas particulier d'emballage, l'emballage d'une charge ayant une forme générale parallèlépipédique, notamment avec son axe 37 placé verticalement, cette charge étant, notamment une charge palettisée 36.Finally, as a second particular case of packaging, the invention relates to the packaging of a load having a generally parallelepiped shape, in particular with its axis 37 placed vertically, this load being, in particular a palletized load 36.

Dans cette application, le film utilisé est également étirable.In this application, the film used is also stretchable.

Le procédé d'emballage d'une telle charge palettisée est tel que dans au moins une phase, on dévide la bande et on réalise sur celle-ci une zone de renfort longitudinale 2 et on applique cette bande avec renfort 1 sur la charge 36 et, simultanément, on étire ou pré-étire le film. Pour appliquer la bande sur la charge 36, on effectue un déplacement relatif à pivotement de la charge 36 par rapport à la bande (notamment la bobine de bande), soit la bobine étant à axe fixe et la charge pivotante (machine à table tournante), soit la bobine étant à axe monté pivotant autour d'un bras monté à rotation et la charge fixe (machine à bras tournant).The method of packaging such a palletized load is such that in at least one phase, the strip is unwound and a longitudinal reinforcement zone 2 is produced thereon and this strip with reinforcement 1 is applied to the load 36 and , simultaneously, the film is stretched or pre-stretched. To apply the strip to the load 36, the load 36 is pivoted relative to the strip (in particular the strip spool), either the spool having a fixed axis and the pivoting load (rotary table machine) , either the reel being with a shaft mounted pivoting around an arm mounted for rotation and the fixed load (machine with rotating arm).

Plus précisément, on applique la zone de renfort longitudinale 2 sur l'arête d'extrémité supérieure 38 et/ou inférieure 39 et/ou sur la face latérale 40 à proximité de la face horizontale supérieure 41 et/ou inférieure 42 ; et/ou sur les coins 43 ; et/ou à la jonction de deux lits superposés de paquets élémentaires constituant la charge 36; et/ou à intervalles réguliers entre les faces horizontales supérieure 41 et inférieure 42, ou selon toute autre configuration souhaitée.More specifically, the longitudinal reinforcement zone 2 is applied to the upper end edge 38 and / or lower 39 and / or to the lateral face 40 near the upper horizontal face 41 and / or lower 42; and / or on the corners 43; and / or at the junction of two superimposed beds of elementary packages constituting the load 36; and / or at regular intervals between the upper 41 and lower 42 horizontal faces, or according to any other desired configuration.

Par exemple, ce procédé permet de réaliser un emballage selon la figure 20 dans lequel la bande de film est placé en diagonale sur certaines faces verticales de la charge 36 entre des coins 43 hauts et bas opposés.For example, this method makes it possible to produce a packaging according to FIG. 20 in which the film strip is placed diagonally on certain vertical faces of the load 36 between opposite top and bottom corners 43.

Une machine d'emballage comporte des moyens support 44 d'une bobine de bande de film à axe vertical ; des moyens support 45 de charge ; des moyens pour opérer un déplacement relatif des moyens support 44, respectivement de la bobine de bande de film, et des moyens support 45, respectivement de la charge 36, à pivotement autour d'un axe vertical 46 ; un dispositif 47 pour réaliser en continu une zone de renfort longitudinale 2 sur la bande de film, interposé entre les moyens support 44 respectivement la bobine de bande film, et les moyens support 45, respectivement la charge 36 elle-même, la bande de film passant à défilement dans ce dispositif 44, des moyens de coupe transversale de la bande de film ; des moyens de solidarisation de la bande de film sur elle-même et/ou sur la charge ; et des moyens d'étirage ou de pré-étirage du film 48.A packaging machine comprises support means 44 for a reel of film strip with a vertical axis; load support means 45; means for operating a relative displacement of the support means 44, respectively of the film strip reel, and support means 45, respectively of the load 36, pivotally about a vertical axis 46; a device 47 for continuously producing a longitudinal reinforcement zone 2 on the film strip, interposed between the support means 44 respectively the film strip reel, and the support means 45, respectively the load 36 itself, the film strip passing, in this device 44, means for transversely cutting the film strip; means for securing the film strip to itself and / or to the load; and means for stretching or pre-stretching the film 48.

La structure générale d'une telle machine, à table tournante ou à bras tournant avec bande sans renfort est bien connue de l'homme du métier et n'est pas décrite plus avant.The general structure of such a machine, with a rotary table or with a rotating arm with a band without reinforcement, is well known to those skilled in the art and is not described further.

En variante, la charge 36 est à axe 37 horizontal au lieu de vertical et l'axe de la bobine de bande de film est également horizontal. Cette variante est bien adaptée à des charges de grande longueur horizontale. Les autres caractéristiques décrites sont également applicables à cette variante. En variante, le film est thermorétractable et non étirable et la machine comporte des moyens de chauffage intégrés ou distincts tels que rampe de chauffage, cadre de thermorétraction, tunnel chauffant.As a variant, the load 36 has a horizontal axis 37 instead of a vertical one and the axis of the film strip reel is also horizontal. This variant is well suited to loads of great horizontal length. The other characteristics described are also applicable to this variant. As a variant, the film is heat-shrinkable and non-stretchable and the machine includes means for integrated or separate heating such as a heating ramp, heat-shrinking frame, heating tunnel.

Claims (29)

1) Procédé pour réaliser en continu un renfort longitudinal sur une bande souple de film en matière plastique, caractérisé en ce qu'on part d'une bande , continue dans son ensemble, dépourvue de renfort, on fait défiler la bande en sens longitudinal selon un mouvement relatif et dans au moins une phase de pliage longitudinal, on amène progressivement en sens longitudinal et/ou en sens transversal au moins deux zones longitudinales de pliage (3A, 3B) adjacentes de la bande à venir à recouvrement à plat l'une sur l'autre pour former au moins un pli longitudinal (7) constituant au moins une partie de la zone de renfort longitudinale (2), ce qui permet la réalisation d'une bande applicable plus spécialement à la constitution d'emballage qui comporte au moins une zone de renfort longitudinale (2) constituée, au moins pour partie, par N zones longitudinales de pliage (3a, 3b, 3N) de la bande (1), adjacentes les unes aux autres, à recouvrement au moins sensiblement à plat, au moins pour partie les unes sur les autres, dans une même région longitudinale de la bande (1), N étant un nombre entier positif au moins égal à deux.1) Method for continuously producing a longitudinal reinforcement on a flexible strip of plastic film, characterized in that one starts from a strip, continuous as a whole, devoid of reinforcement, the strip is scrolled in longitudinal direction according to a relative movement and in at least one longitudinal folding phase, at least two longitudinal folding zones (3A, 3B) adjacent to the strip to be laid flat overlap are gradually brought in longitudinal direction and / or in transverse direction on the other to form at least one longitudinal fold (7) constituting at least part of the longitudinal reinforcement zone (2), which allows the production of a strip applicable more specifically to the constitution of packaging which comprises at at least one longitudinal reinforcement zone (2) constituted, at least in part, by N longitudinal folding zones (3a, 3b, 3N) of the strip (1), adjacent to each other, overlapping at least substantially flat, at least for party e on top of each other, in the same longitudinal region of the strip (1), N being a positive integer at least equal to two. 2) Procédé pour réaliser en continu un renfort longitudinal sur une bande souple de film en matière plastique , caractérisé en ce qu'on part d'une bande en forme de gaine à soufflet longitudinal, continue dans son ensemble, on fait défiler la bande en sens longitudinal selon un mouvement relatif et dans au moins une phase d'ouverture longitudinale, on fend la gaine longitudinalement et on ouvre la gaine en sens transversal tout en gardant le soufflet, au moins partiellement, de manière que la gaine ouverte forme une bande à plat dont le soufflet longitudinal constitue la forme de renfort longitudinal (2) ce qui permet la réalisation d'une bande applicable plus spécialement à la constitution d'emballage qui comporte au moins une zone de renfort longitudinale (2) constituée, au moins pour partie, par N zones longitudinales de pliage (3a, 3b, 3N) de la bande (1), adjacentes les unes aux autres, à recouvrement au moins sensiblement à plat, au moins pour partie les unes sur les autres, dans une même région longitudinale de la bande (1), N étant un nombre entier positif au moins égal à deux.2) Process for continuously producing longitudinal reinforcement on a flexible strip of plastic film, characterized in that one starts from a strip in the form of a sheath with longitudinal bellows, continuous as a whole, the strip is made to pass longitudinal direction in a relative movement and in at least one longitudinal opening phase, the sheath is split longitudinally and the sheath is opened in the transverse direction while keeping the bellows, at least partially, so that the open sheath forms a strip with flat whose longitudinal bellows constitutes the form of longitudinal reinforcement (2) which allows the production of a strip more specifically applicable to the constitution of packaging which comprises at least one longitudinal reinforcement zone (2) formed, at least in part , by N longitudinal folding zones (3a, 3b, 3N) of the strip (1), adjacent to each other, overlapping at least substantially flat, at least partly over one another, in the same longitudinal region of the strip (1), N being a number positive integer at least equal to two. 3) Procédé pour réaliser un renfort longitudinal selon l'une quelconque des revendications 1 et 2, caractérisé en ce que pendant et au moins immédiatement après la phase de pliage longitudinal ou après la phase d'ouverture longitudinale, on maintient la bande (1) à plat sous tension en sens longitudinal.3) Method for producing a longitudinal reinforcement according to any one of claims 1 and 2, characterized in that during and at least immediately after the longitudinal folding phase or after the longitudinal opening phase, the strip (1) is maintained flat under tension in longitudinal direction. 4) Procédé pour réaliser un renfort longitudinal selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'après la dernière phase de pliage longitudinal ou d'ouverture longitudinale, on applique et on maintient appliquée la bande (1) à zone de renfort longitudinale (2) sur un support, tel qu' une bobine sur laquelle la bande (1) à zone de renfort longitudinale (2) est enroulée, ou au moins un rouleau mobile d'une machine mettant en oeuvre la bande (1) à renfort longitudinal et sur lequel défile cette bande, ou une charge (10) devant être recouverte avec la bande (1) à zone de renfort longitudinale notamment une charge à emballer.4) Method for producing a longitudinal reinforcement according to any one of claims 1 to 3, characterized in that after the last phase of longitudinal folding or longitudinal opening, the band (1) is applied and is kept applied of longitudinal reinforcement (2) on a support, such as a reel on which the strip (1) with longitudinal reinforcement zone (2) is wound, or at least one movable roller of a machine implementing the strip (1 ) with longitudinal reinforcement and on which this strip runs, or a load (10) to be covered with the strip (1) with longitudinal reinforcement zone, in particular a load to be packaged. 5) Procédé pour réaliser un renfort longitudinal selon l'une quelconque des revendications 1 à 4, caractérisé en ce que pour amener deux zones longitudinales de pliage (3A, 3B) à venir en recouvrement, on les fait glisser progressivement l'une sur et par rapport à l'autre dans le plan de la bande (1).5) A method for producing a longitudinal reinforcement according to any one of claims 1 to 4, characterized in that to bring two longitudinal folding zones (3A, 3B) to come into overlap, they are gradually dragged one over and relative to each other in the plane of the strip (1). 6) Procédé pour réaliser un renfort longitudinal selon l'une quelconque des revendications 1 à 5, caractérisé en ce que pour amener deux zones longitudinales de pliage (3A, 3B) en recouvrement en premier lieu, on fait défiler, de façon relative, d'une part, une première zone longitudinale de la bande, notamment au moins une partie d'une première zone longitudinale de pliage (3A), longitudinalement le long et contre un premier patin (11) longitudinalement étendu et limité situé sur une première surface (6A) de la bande (1) et, d'autre part, une seconde zone longitudinale de la bande, notamment au moins une partie d'une seconde zone longitudinale de pliage (3B), longitudinalement le long et contre un second patin (12) longitudinalement étendu et limité situé sur une seconde surface (6B) de la bande (1) ; et, en combinaison, en second lieu, on dispose les premier et second patins (11,12) de manière, d'une part, qu'au début de la phase de pliage longitudinal le premier et le second patins (11, 12) soient placés de part et d'autre de la bande (1) en étant respectivement dirigés vers sa première surface (6A) et sa seconde surface (6B) et, d'autre part, qu'à la fin de la phase de pliage longitudinal le premier et le second patins (11, 12) soient placés de part et d'autre d'au moins une partie de l'une des zones longitudinales de pliage en étant respectivement dirigés vers la seconde surface (6B) et la première surface (6A) de la bande (1).6) Method for producing a longitudinal reinforcement according to any one of claims 1 to 5, characterized in that to bring two longitudinal folding zones (3A, 3B) overlapping in the first place, is scrolled, relatively, d firstly, a first longitudinal zone of the strip, in particular at least part of a first longitudinal folding zone (3A), longitudinally along and against a first pad (11) longitudinally extended and limited situated on a first surface ( 6A) of the strip (1) and, on the other hand, a second longitudinal zone of the strip, in particular at least part of a second longitudinal folding zone (3B), longitudinally along and against a second pad (12 ) longitudinally extended and limited located on a second surface (6B) of the strip (1); and, in combination, secondly, the first and second pads (11,12) are arranged so, on the one hand, that at the start from the longitudinal folding phase, the first and second pads (11, 12) are placed on either side of the strip (1), being directed respectively towards its first surface (6A) and its second surface (6B) and , on the other hand, that at the end of the longitudinal folding phase the first and the second pads (11, 12) are placed on either side of at least part of one of the longitudinal zones of folding by being directed respectively to the second surface (6B) and the first surface (6A) of the strip (1). 7) Procédé pour réaliser un renfort longitudinal selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'on insère entre deux zones longitudinales de pliage (3A, 3B) un corps (9) incorporé à la zone de renfort longitudinale (2) et notamment on envoie le corps (9) de manière à l'engager entre les deux zones longitudinales de pliage (3A, 3B) venant à recouvrement.7) Method for producing a longitudinal reinforcement according to any one of claims 1 to 6, characterized in that a body (9) incorporated into the longitudinal reinforcement zone (2) is inserted between two longitudinal folding zones (3A, 3B) 2) and in particular the body (9) is sent so as to engage it between the two longitudinal folding zones (3A, 3B) coming to overlap. 8) Procédé pour réaliser un renfort longitudinal selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'on procède à une solidarisation, notamment au soudage, des zones longitudinales de pliage (3A, 3B) de la zone de renfort longitudinale (2), par point, par ligne ou par zone, de façon continue ou discontinue, longitudinalement et/ou transversalement.8) Method for producing a longitudinal reinforcement according to any one of claims 1 to 7, characterized in that one proceeds to a joining, in particular to welding, of the longitudinal folding zones (3A, 3B) of the longitudinal reinforcement zone (2), by point, by line or by zone, continuously or discontinuously, longitudinally and / or transversely. 9) Dispositif pour réaliser en continu un renfort longitudinal (2) sur une bande, pour la mise en oeuvre du procédé selon l'une quelconque des revendications 1, 3 à 8, caractérisé en ce qu'il comporte des moyens d'amenée en continu de bande dépourvue de renfort, d'entraînement en défilement longitudinal de cette bande et d'évacuation de la bande (1) à renfort ; des moyens pour maintenir la bande sous tension en sens longitudinal ; au moins un premier et un second patins (11, 12) longitudinalement étendus et limités qui, dans leur état actif, ont leurs parties extrêmes aval (13, 14) au moins partiellement superposées et écartées l'une de l'autre dans la direction perpendiculaire à leur plan, ayant pour fonction de conformer la bande qui glisse sur eux de manière que les parties aval (13, 14) superposées et écartées réalisent le recouvrement des zones longitudinales de pliage (3A, 3B).9) Device for continuously producing a longitudinal reinforcement (2) on a strip, for implementing the method according to any one of claims 1, 3 to 8, characterized in that it comprises means for supplying continuous strip without reinforcement, drive in longitudinal movement of this strip and discharge of the strip (1) with reinforcement; means for keeping the strip tensioned in the longitudinal direction; at least first and second pads (11, 12) longitudinally extended and limited which, in their active state, have their downstream end portions (13, 14) at least partially superimposed and spaced from each other in the direction perpendicular to their plane, having the function of conforming the strip which slides over them so that the downstream parts (13, 14) superimposed and spaced out overlap the longitudinal folding zones (3A, 3B). 10) Dispositif pour réaliser en continu un renfort longitudinal sur une bande, selon la revendication 9, caractérisé en ce que les patins (11, 12) sont agencés de manière que leurs parties extrêmes amont (15, 16) soient écartées transversalement l'une de l'autre ; pour se rapprocher transversalement l'une de l'autre de leurs parties extrêmes amonts à leurs parties extrêmes avals (13, 14) ; au moins un patin (11, 12) étant mobile, notamment dans son propre plan, de manière qu'au moins sa partie extrême aval (13, 14) puisse être écartée de la partie extrême aval (14, 13) de l'autre patin (12, 11) , des moyens d'entraînement (17) permettant de déplacer le patin mobile, notamment le patin étant monté mobile à pivotement autour d'un axe perpendiculaire (18) à propre plan situé à l'endroit ou au voisinage de sa partie extrême amont (15, 16), les moyens d'entraînement (17) étant constitués par un vérin.10) Device for continuously producing longitudinal reinforcement on a strip according to claim 9, characterized in that the pads (11, 12) are arranged so that their upstream end portions (15, 16) are spaced transversely from one another; to move transversely towards each other from their upstream end parts to their downstream end parts (13, 14); at least one shoe (11, 12) being mobile, in particular in its own plane, so that at least its downstream end part (13, 14) can be moved away from the downstream end part (14, 13) from the other pad (12, 11), drive means (17) for moving the movable pad, in particular the pad being pivotally mounted to pivot about a perpendicular axis (18) with its own plane located at the place or in the vicinity its upstream end part (15, 16), the drive means (17) being constituted by a jack. 11) Dispositif pour réaliser en continu un renfort longitudinal sur une bande, selon l'une quelconque des revendications 9 et 10, caractérisé en ce qu'un patin (11, 12) se présente sous la forme d'une lame agencée pour que la bande puisse glisser sur sa surface, cette lame étant limitée par un bord longitudinal d'attaque (19) notamment effilé mais non coupant sur lequel vient s'appliquer progressivement et défiler la bande pour former un pli longitudinal (7), cette lame comportant une saillie longitudinale (20) par rapport à son plan, servant de conformateur.11) Device for continuously producing longitudinal reinforcement on a strip, according to any one of claims 9 and 10, characterized in that a shoe (11, 12) is in the form of a blade arranged so that the strip can slide on its surface, this blade being limited by a longitudinal leading edge (19) in particular tapered but not cutting on which comes to be applied progressively and scroll the band to form a longitudinal fold (7), this blade comprising a longitudinal projection (20) relative to its plane, serving as a conformator. 12) Dispositif pour réaliser en continu un renfort longitudinal sur une bande, selon l'une quelconque des revendications 9 à 12, caractérisé en ce qu'il comporte des moyens (21) pour insérer un corps (9) entre deux zones longitudinales de pliage (3A, 3B) consistant en un patin avec lequel coopère ledit corps (9), ce patin (21) ayant pour fonction de guider ledit corps (9) pour l'amener entre les zones longitudinales de pliage (3A, 3B).12) Device for continuously producing longitudinal reinforcement on a strip, according to any one of claims 9 to 12, characterized in that it comprises means (21) for inserting a body (9) between two longitudinal folding zones (3A, 3B) consisting of a shoe with which said body (9) cooperates, this shoe (21) having the function of guiding said body (9) to bring it between the longitudinal folding zones (3A, 3B). 13) Dispositif pour réaliser en continu un renfort longitudinal sur une bande, pour la mise en oeuvre du procédé selon l'une quelconque des revendications 2 à 8, caractérisé par le fait qu'il comporte des moyens d'amenée en continu de bande sous forme de gaine à soufflet, d'entraînement en défilement longitudinal et d'évacuation de la bande (1) à renfort réalisée ; des moyens pour fendre longitudinalement la gaine et des moyens pour ouvrir la gaine tout en maintenant le soufflet au moins partiellement formé.13) Device for continuously producing longitudinal reinforcement on a strip, for implementing the method according to any one of claims 2 to 8, characterized in that it comprises means for continuously feeding the strip under form of bellows sheath, drive in longitudinal travel and evacuation of the band (1) with reinforcement produced; means for longitudinally splitting the sheath and means for opening the sheath while maintaining the bellows at least partially formed. 14) Bande obtenue par le procédé selon l'une quelconque des revendications 1 à 8 ou le dispositif selon l'une quelconque des revendications 9 à 13, caractérisée en ce que les N zones longitudinales de pliage (3A, 3B, ... 3N) constituant la zone de renfort longitudinale (2) sont décalées et/ou de largeurs différentes en constituant alors une zone de renfort longitudinale (2) d'épaisseur variable en sens transversal, notamment comportant une plus grande épaisseur dans la ligne longitudinale médiane de cette zone de renfort (2) et une plus faible épaisseur au bord longitudinal de cette zone de renfort (2) en particulier une épaisseur décroissant depuis la ligne longitudinale médiane jusqu'au bord longitudinal.14) Strip obtained by the method according to any one of claims 1 to 8 or the device according to any one of claims 9 to 13, characterized in that the N longitudinal bending zones (3A, 3B, ... 3N ) constituting the longitudinal reinforcement zone (2) are offset and / or of different widths while constituting a longitudinal reinforcement zone (2) of variable thickness in transverse direction, in particular comprising a greater thickness in the median longitudinal line of this reinforcement zone (2) and a smaller thickness at the longitudinal edge of this reinforcement zone (2) in particular a decreasing thickness from the median longitudinal line to the longitudinal edge. 15) Bande obtenue par le procédé selon l'une quelconque des revendications 1 à 8 ou le dispositif selon l'une quelconque des revendications 9 à 13, caractérisé en ce que les zones longitudinales de pliage (3A, 3B, ... 3N) sont solidarisées notamment par soudage (8).15) Strip obtained by the method according to any one of claims 1 to 8 or the device according to any one of claims 9 to 13, characterized in that the longitudinal folding zones (3A, 3B, ... 3N) are joined together in particular by welding (8). 16) Bande obtenue par le procédé selon l'une quelconque des revendications 1 à 8 ou le dispositif selon l'une quelconque des revendications 9 à 13, caractérisée en ce que le film en matière plastique constituant la bande 1 est thermorétractable ou étirable.16) Strip obtained by the method according to any one of Claims 1 to 8 or the device according to any one of Claims 9 to 13, characterized in that the plastic film constituting the strip 1 is heat-shrinkable or stretchable. 17) Emballage pour une charge (10), du type comprenant au moins un tronçon longitudinal de bande souple constituée plus spécialement par un film en matière plastique, caractérisé par le fait que le tronçon longitudinal est d'une bande (1) à renfort obtenue par le procédé selon l'une quelconque des revendications 1 à 8 ou le dispositif selon l'une quelconque des revendications 9 à 13, le tronçon de bande (1) étant appliqué sur la charge (10) emballée, avec une zone de renfort longitudinale (2) du tronçon de bande (1) située à l'endroit où l'emballage doit être renforcé ou la charge (10) davantage protégée à savoir une zone en saillie de la charge (10) tel qu'un angle, une arête, un coin.17) Packaging for a load (10), of the type comprising at least one longitudinal section of flexible strip formed more especially by a plastic film, characterized in that the longitudinal section is of a strip (1) with reinforcement obtained by the method according to any one of Claims 1 to 8 or the device according to any one of Claims 9 to 13, the strip section (1) being applied to the packaged load (10), with a longitudinal reinforcement zone (2) of the strip section (1) located at the place where the packaging must be reinforced or the load (10) more protected, namely a projecting area of the load (10) such as an angle, an edge , a corner. 18) Procédé d'emballage d'une charge (10) avec une bande souple en matière plastique comportant un renfort longitudinal caractérisé en ce qu'on part d'une bande dépourvue de renfort, on la dévide, on réalise en continu la zone de renfort longitudinale (2) on effectue un déplacement relatif de la bande (1) ainsi renforcée par rapport à la charge (10) à emballer et on applique la bande (1) sur la charge (10), et on associe rigidement la bande (1) sur elle-même et/ou sur la charge (10).18) Method for packaging a load (10) with a flexible plastic band comprising a longitudinal reinforcement, characterized in that starting from a strip without reinforcement, it is unwound, the longitudinal reinforcement zone (2) is produced continuously, a relative movement of the strip (1) is thus reinforced with respect to the load (10) at pack and apply the strip (1) on the load (10), and rigidly associate the strip (1) on itself and / or on the load (10). 19) Procédé d'emballage d'une charge (10) avec une bande souple en matière plastique comportant un renfort longitudinal caractérisé en ce qu'on part d'une bande à renfort (1) déjà réalisée, notamment enroulée en bobine, on la dévide, on effectue un déplacement relatif de la bande (1) ainsi renforcée par rapport à la charge (10) à emballer et on applique la bande (1) sur la charge (10), et on associe rigidement la bande (1) sur elle-même et/ou sur la charge (10).19) Method for packaging a load (10) with a flexible plastic band comprising a longitudinal reinforcement, characterized in that one starts with a reinforcement band (1) already produced, in particular wound in a reel, it is unwinds, the belt (1) thus reinforced is moved relative to the load (10) to be packed and the band (1) is applied to the load (10), and the band (1) is rigidly associated with itself and / or on the load (10). 20) Procédé d'emballage selon l'une quelconque des revendications 18,19 , caractérisé en ce qu'on utilise un film en matière plastique thermorétractable et on chauffe la bande 1 une fois appliquée sur la charge 10 pour provoquer sa rétraction.20) A packaging method according to any one of claims 18,19, characterized in that a heat-shrinkable plastic film is used and the strip 1 is heated once applied to the load 10 to cause it to shrink. 21) Procédé d'emballage selon l'une quelconque des revendications 18, 19, caractérisé en ce qu'on utilise un film en matière plastique étirable et on étire ou pré-étire longitudinalement la bande lors de l'application sur la charge.21) A packaging method according to any one of claims 18, 19, characterized in that a stretchable plastic film is used and the strip is stretched or pre-stretched longitudinally during application to the load. 22) Procédé d'emballage selon l'une quelconque des revendications 18, 20, 21, caractérisé en ce qu'il comporte au moins une phase pendant laquelle on réalise une zone de renfort (2) et au moins une phase pendant laquelle on ne réalise pas une telle zone de renfort (2) la bande délivrée et utilisée étant alors dépourvue de zone de renfort (2).22) A packaging method according to any one of claims 18, 20, 21, characterized in that it comprises at least one phase during which a reinforcing zone (2) is produced and at least one phase during which no not realize such a reinforcement zone (2) the strip delivered and used then being devoid of reinforcement zone (2). 23) Procédé d'emballage selon l'une quelconque des revendications 18, 21, 22, caractérisé en ce que d'une part, la charge (10) a une forme générale cylindrique, par exemple circulaire, notamment avec son axe de révolution (26) placé horizontalement, cette charge étant notamment une bobine de papier (25), et, d'autre part, le film est de type étirable ; dans au moins une éventuelle première phase, on dévide la bande éventuellement sans réaliser de renfort sur celle-ci et on applique cette bande sans renfort sur au moins une partie de la surface cylindrique (27) de la charge (25) et, dans au moins une deuxième phase, on dévide la bande et on réalise sur celle-ci une zone de renfort longitudinale (2) et on applique cette bande avec renfort (1) avec une zone de renfort longitudinale (2) sur une arête d'extrémité (28) de la surface cylindrique (27) ; au moins pendant la ou les deuxième phases, on étire ou pré-étire le film constituant la bande (1) , ce qui a pour effet de provoquer l'application de la bande (1) sur la ou les faces d'extrémité (29) de la charge (25) ; on coupe transversalement la bande de film (1) et on solidarise sa partie extrême terminale à la charge (25) et/ou la partie intermédiaire de la bande de film (1) déjà appliquée sur la charge (25).23) A method of packaging according to any one of claims 18, 21, 22, characterized in that on the one hand, the load (10) has a generally cylindrical shape, for example circular, in particular with its axis of revolution ( 26) placed horizontally, this load being in particular a reel of paper (25), and, on the other hand, the film is of the stretchable type; in at least one possible first phase, the tape is unwound if necessary without making reinforcement thereon and apply this strip without reinforcement on at least part of the cylindrical surface (27) of the load (25) and, in at least a second phase, the strip is unwound and a longitudinal reinforcement zone is produced thereon (2 ) and applying this strip with reinforcement (1) with a longitudinal reinforcement zone (2) on an end edge (28) of the cylindrical surface (27); at least during the second phase (s), the film constituting the strip (1) is stretched or pre-stretched, which has the effect of causing the strip (1) to be applied to the end face (s) (29 ) of the load (25); the film strip (1) is cut transversely and its end end part is secured to the load (25) and / or the intermediate part of the film strip (1) already applied to the load (25). 24) Procédé selon la revendication 23, caractérisé en ce qu'il comporte une première phase initiale, suivie d'une deuxième phase concernant une première arête d'extrémité (28), suivie d'une première phase intermédiaire, suivie d'une deuxième phase concernant une seconde arête d'extrémité (28), suivie d'une première phase terminale.24) Method according to claim 23, characterized in that it comprises a first initial phase, followed by a second phase relating to a first end edge (28), followed by a first intermediate phase, followed by a second phase relating to a second end edge (28), followed by a first terminal phase. 25) Procédé selon l'une quelconque des revendications 23, 24, caractérisé en ce qu'on étire ou pré-étire également le film pendant la ou les premières phases.25) Method according to any one of claims 23, 24, characterized in that the film is also stretched or pre-stretched during the first phase or phases. 26) Procédé selon l'une quelconque des revendications 23 à 25, caractérisé en ce que dans une deuxième phase, on réalise une zone de renfort longitudinale médiane (2).26) Method according to any one of claims 23 to 25, characterized in that in a second phase, a central longitudinal reinforcement zone (2) is produced. 27) Installation d'emballage d'une charge de forme générale cylindrique, par exemple circulaire, notamment avec son axe (26) de révolution placé horizontalement, cette charge étant notamment une bobine de papier (25) et le film de type étirable pour la mise en oeuvre du procédé selon l'une quelconque des revendications 23 à 26, caractérisée en ce qu'elle comporte des moyens support (30) d'une bobine de bande de film à axe horizontal, des moyens support (31) motorisés de la charge (25), aptes à permettre son pivotement autour de son axe de révolution (26) ; Un dispositif (32) pour réaliser en continu une zone de renfort longitudinale (2) sur la bande de film, interposé entre les moyens support (30) respectivement la bobine de bande de film elle-même, et les moyens support (31), respectivement la charge (25) elle-même, la bande de film passant à défilement dans ce dispositif (32) ; des moyens de coupe transversale (33) de la bande de film ; des moyens de solidarisation (34) de la bande de film sur elle-même et/ou sur la charge (25) ; des moyens pour assurer un coulissement relatif horizontal du dispositif (32) et des moyens support (31) de charge parallèlement à l'axe (26) ; et des moyens d'étirage ou de pré-étirage (35) du film placés en aval du dispositif (32) pour réaliser le renfort ; des moyens de commande du dispositif (32) notamment couplés aux moyens pour assurer le coulissement relatif dudit dispositif (32) et des moyens support (31) de charge, de manière que ledit dispositif (32) soit actif lorsque les moyens pour assurer de coulissement relatif amènent la bande de film au droit d'une arête d'extrémité (28).27) Installation for packaging a load of generally cylindrical shape, for example circular, in particular with its axis (26) of revolution placed horizontally, this load being in particular a reel of paper (25) and the film of stretch type for the implementation of the method according to any one of claims 23 to 26, characterized in that it comprises support means (30) of a reel of film strip with horizontal axis, support means (31) motorized from the load (25), able to allow it to pivot about its axis of revolution (26); A device (32) for continuously producing a longitudinal reinforcement zone (2) on the film strip, interposed between the support means (30) respectively the film strip reel itself, and the support means (31), respectively the load (25) itself, the film strip running in this device (32); means for cross-cutting (33) the film strip; means for securing (34) the film strip to itself and / or to the load (25); means for ensuring horizontal relative sliding of the device (32) and load support means (31) parallel to the axis (26); and stretching or pre-stretching means (35) of the film placed downstream of the device (32) to produce the reinforcement; device control means (32) in particular coupled to the means for ensuring the relative sliding of said device (32) and load support means (31), so that said device (32) is active when the means for ensuring sliding relative bring the film strip to the right of an end edge (28). 28) Procédé d'emballage selon l'une quelconque des revendications 18, 21, 22, caractérisé en ce que, d'une part, la charge (36) a une forme générale parallélépipédique notamment avec son axe (37) placé verticalement, cette charge étant notamment une charge palettisée et, d'autre part, le film est du type étirable ; dans au moins une phase, on dévide la bande et on réalise sur celle-ci une zone de renfort longitudinale (2) et on étire ou pré-étire le film et, simultanément on applique cette bande avec renfort (1) sur la charge (36) notamment sur l'arête d'extrémité supérieure (38) et/ou inférieure (39) et/ou sur la face latérale (40) à proximité de la face horizontale supérieure (41) et/ou inférieure (42) ; et/ou sur les coins ; et/ou à la jonction de deux lits superposés de paquets élémentaires constituant la charge (36) ; et/ou à intervalles réguliers entre les faces horizontales supérieure et inférieure.28) A method of packaging according to any one of claims 18, 21, 22, characterized in that, on the one hand, the load (36) has a generally parallelepiped shape in particular with its axis (37) placed vertically, this load being in particular a palletized load and, on the other hand, the film is of the stretchable type; in at least one phase, the strip is unwound and a longitudinal reinforcement zone (2) is produced thereon and the film is stretched or pre-stretched, and simultaneously this strip with reinforcement (1) is applied to the load ( 36) in particular on the upper end edge (38) and / or lower (39) and / or on the lateral face (40) near the upper horizontal face (41) and / or lower (42); and / or on the corners; and / or at the junction of two superimposed beds of elementary packages constituting the load (36); and / or at regular intervals between the upper and lower horizontal faces. 29) Machine d'emballage d'une charge (36) de forme générale parallélépipédique, notamment avec son axe (37) placé verticalement, cette charge (36) étant notamment une charge palettisée, pour la mise en oeuvre du procédé selon la revendication 28, caractérisée en ce qu'elle comporte des moyens support (44) d'une bobine de bande de film à axe vertical ; des moyens support (45) de charge ; des moyens pour opérer un déplacement relatif des moyens support (44) , respectivement de la bobine de bande de film et des moyens support (45), respectivement de la charge (36), à pivotement autour d'un axe vertical (46) ; un dispositif (47) pour réaliser en continu une zone de renfort longitudinale (2) sur la bande de film, interposé entre les moyens support 44 , respectivement la bobine de bande de film, et les moyens support (45), respectivement la charge (36) elle-même, la bande de film passant à défilement dans ce dispositif (44) ; des moyens de coupe transversale de la bande de film ; des moyens de solidarisation de la bande de film sur elle-même et/ou sur la charge ; et des moyens d'étirage ou de pré-étirage du film (48).29) machine for packaging a load (36) of generally parallelepiped shape, in particular with its axis (37) placed vertically, this load (36) being in particular a palletized load, for implementing the method according to claim 28 , characterized in that it comprises support means (44) of a film strip reel with a vertical axis; load support means (45); means for effecting a relative displacement of the support means (44), respectively of the film strip reel and the support means (45), respectively of the load (36), pivotally about a vertical axis (46); a device (47) for continuously producing a zone longitudinal reinforcement (2) on the film strip, interposed between the support means 44, respectively the film strip reel, and the support means (45), respectively the load (36) itself, the film strip passing scrolling in this device (44); means for cross-cutting the film strip; means for securing the film strip to itself and / or to the load; and means for stretching or pre-stretching the film (48).
EP88401615A 1987-06-26 1988-06-24 Web with longitudinal reinforcement, its manufacture and its use in packaging methods and device for making such a web Expired - Lifetime EP0300855B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8709063A FR2617123B1 (en) 1987-06-26 1987-06-26 TAPE WITH LONGITUDINAL REINFORCEMENT, PACKAGING METHOD AND PACKAGING COMPRISING SUCH A TAPE, INSTALLATION AND MACHINE FOR CARRYING OUT THE PACKAGING PROCESS, AND DEVICE FOR CARRYING OUT SUCH A TAPE
FR8709063 1987-06-26

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EP0300855A1 true EP0300855A1 (en) 1989-01-25
EP0300855B1 EP0300855B1 (en) 1991-12-11

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EP88401615A Expired - Lifetime EP0300855B1 (en) 1987-06-26 1988-06-24 Web with longitudinal reinforcement, its manufacture and its use in packaging methods and device for making such a web

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EP (1) EP0300855B1 (en)
DE (1) DE3866809D1 (en)
FR (1) FR2617123B1 (en)

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FR2617123B1 (en) 1989-12-29
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EP0300855B1 (en) 1991-12-11
US4905451A (en) 1990-03-06

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