EP1075425A2 - Container neck and method for making same, and container with assembling method and device - Google Patents

Container neck and method for making same, and container with assembling method and device

Info

Publication number
EP1075425A2
EP1075425A2 EP99915840A EP99915840A EP1075425A2 EP 1075425 A2 EP1075425 A2 EP 1075425A2 EP 99915840 A EP99915840 A EP 99915840A EP 99915840 A EP99915840 A EP 99915840A EP 1075425 A2 EP1075425 A2 EP 1075425A2
Authority
EP
European Patent Office
Prior art keywords
container
neck
fact
component
thermoforming
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.)
Withdrawn
Application number
EP99915840A
Other languages
German (de)
French (fr)
Inventor
Thierry Costes
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.)
Packland SA
Original Assignee
Packland 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 Packland SA filed Critical Packland SA
Publication of EP1075425A2 publication Critical patent/EP1075425A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B65D15/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials
    • B65D15/02—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums
    • B65D15/04—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums with curved, or partially curved, walls made by winding or bending paper
    • B65D15/08—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums with curved, or partially curved, walls made by winding or bending paper with end walls made of plastics material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/08—Deep drawing or matched-mould forming, i.e. using mechanical means only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/0029—Cold deforming of thermoplastics material
    • 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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/72—Contents-dispensing means
    • B65D5/727—Dispensing openings provided in the upper end-walls of tubular containers, the openings being closed by means of separate stopper or other closure elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures

Definitions

  • Container neck with its manufacturing process and container with its process and assembly device.
  • the present invention relates to the field of packaging and, more particularly the packaging of products which can be removed from a container by successive withdrawals, which involves several closings and uncorkings, it being specified that successive closings must always guarantee leaktightness of the container.
  • Such containers are particularly applicable to flowable products, whether liquid, creamy or powdery.
  • the object of the present invention is to provide a new solution making it possible to generalize the use of a smooth neck calibrated around an orifice to all kinds of containers made of different materials.
  • the subject of the invention is a method of manufacturing a container neck comprising an orifice surrounded by a neck which is continuously cylindrical and which is produced by thermoforming a sheet of synthetic material, remarkable in that the a sheet of synthetic material is subjected to a thermoforming operation in order to obtain a blank for a component of the container and which is cleaned in this blank, either during thermoforming either later, a hole with a diameter smaller than that desired for the orifice, then after cooling the blank, a drawing operation is carried out on said blank, by means of a holding and a cylindrical punch forced into the hole, this punch having an outside diameter equal to the desired diameter for the orifice, this stamping operation being carried out cold in order to deform the synthetic material mechanically, i.e. a temperature lower than that of thermoforming, without any thinning of the original sheet, to create the neck
  • the subject of the invention is also the container neck obtained according to this process and which is produced by thermoforming a sheet of synthetic material, remarkable in that the sheet having a given nominal thickness, the wall forming the neck has this same thickness without noticeable thinning over its entire useful height, that is to say over the height of its inner face against which must be a shutter of any type engaged in the neck when the container is closed.
  • Figure 1 is a schematic perspective view of a component of this container neck.
  • Figure 2 is a schematic perspective view of a thermoformed blank of such a component, before stamping.
  • Figure 3 is a schematic view illustrating a phase of the manufacturing process of a container neck known from the prior art.
  • Figures 4, 5 and 6 are schematic views illustrating the stamping phase of the manufacturing process of a first embodiment of a container neck according to the invention.
  • Figure 7 is a schematic exploded section view showing a container adapted to a container neck according to the first embodiment of the invention with a standard cap.
  • Figure 8 is a schematic sectional view of the container of Figure 7 after assembly, filling and capping.
  • Figure 9 is a schematic sectional view showing a container similar to that of Figure 8, with a reverse arrangement of the container neck.
  • FIG. 10 is a schematic sectional view showing the presence of a particular obturator on the container neck according to the arrangement of the latter illustrated in FIG. 9.
  • FIG. 11 is a partial schematic view illustrating another example of closure of the container neck of FIGS. 7 and 8.
  • Figures 12, 13 and 14 are schematic views illustrating the stamping phase of the manufacturing process of a second embodiment of a container neck according to one invention.
  • Figure 15 is a schematic exploded section view showing a container adapted to a container neck according to the second embodiment of the invention with a standard plug.
  • Figure 16 is a schematic sectional view of the container of Figure 15 after assembly, filling and capping.
  • Figure 17 is a schematic sectional view showing the container neck of Figures 15 and 16 with another example of closure.
  • Figures 18 and 19 is a schematic sectional view of the second embodiment of a container neck with two other examples of closure.
  • Figure 30 is a partial schematic view illustrating a variant according to the invention for producing a cylindrical container body from a sheet of cardboard coated with a layer of weldable material.
  • Figures 20a, 20b, 20c and 20d are schematic views showing a component adopting the neck of the invention in various forms of association with a container.
  • a part 1 obtained by thermoforming a sheet of synthetic material and having a closing part 2 (which is flat annular in the example illustrated), a central projecting neck 3 surrounding an orifice 4, and a peripheral edge 5.
  • This part intended to be associated with a container body to constitute it a component, will be more commonly called “component” in the context of the invention.
  • the description of the container neck which follows relates to a cylindrical tubular container, component 1 on which the neck is located constituting one end of the container.
  • thermoforming a sheet of synthetic material to create a blank 6, represented in FIG. 2, comprising only a central part 7 and the peripheral edge 5.
  • a small diameter hole 8 which can be created during thermoforming or by subsequent drilling.
  • the synthetic material has a slightly less thickness e, near the neck C, a thickness e_ j even less at the base of the neck C and that at the top of this neck C, the internal face D and the external face E are separated by a thickness e_, significantly smaller than the nominal thickness e.
  • This geometry is acceptable when the container is associated with a shutter created when the container itself is thermoformed simultaneously, the end having to carry the neck and the shutter. Indeed, this guarantees that the contact between the shutter and the inner face D of the neck C will be between two bodies of the same material, which single-material contact, added to the calibration of the inner face D, allows an original closure and successive re-coatings providing an excellent seal during all the time necessary for the removal of the contents in fractions.
  • the neck has many smooth inner and outer faces but the thinning of the constituent material has the consequence that the neck is not rigid and could not support a shutter which does not would not be rigorously calibrated and / or that would not have exactly the desired height, coordinated with that of the collar.
  • the upper edge of the neck is very thin and moreover quite easily deformable, which constitutes a weak point.
  • the blank 6 facing a device which essentially comprises a holding die 10 and a stamping punch 11.
  • the die 10 has a cylindrical chamber
  • the punch 11 is displaced according to the arrow FI until it meets the central part 7 directly above the hole 8, then, beyond inside the chamber 12 and the punch 11 and which arises when the punch 11 is engaged in the chamber 12. After stamping, the punch 11 is removed according to arrow F2, the part 1 formed is separated from the matrix 10 and evacuated for subsequent attachment to a container body.
  • the height of the neck 3 depends on the diameter of the hole 8, that is to say that the neck 3 is all the higher the smaller the diameter of the hole 8 and, conversely, that a hole 8 of large diameter will generate a neck 3 which is not very prominent.
  • the stamping is done cold but it should be specified that this adjective means that the temperature of the punch 11 and / or of the matrix 10, is lower than that which could cause stretching and therefore a thinning of the synthetic material.
  • a temperature slightly higher than room temperature is indeed desirable, not to deform the synthetic material, but to facilitate stamping without breaking.
  • Cold stamping requires the presence of the die 10 whose chamber must be precisely calibrated since it contributes to the formation of the neck 3. Knowing that the thickness e of the material at the top of the neck 3, after stamping, will remain unchanged , it becomes possible to give the neck 3 a rigidity exactly suited to the different possible applications since it suffices to choose the thickness of the original sheet.
  • FIG. 7 illustrates a neck 3 forming an integral part of a component 1 closing the upper end of a container 20 intended to be filled by the orifice 4 of any product, more or less fluid, of liquid, powdery nature , granular, pasty, creamy, etc.
  • This container 20 has a cylindrical tubular body which, formed of an external part 21 and an internal coating 22 shaped in a different material, receives at its lower end a bottom 23 comprising a solid central part 24 and a peripheral edge 25.
  • a shutter which, here, is constituted by a plug standard 26, comprising an elastic active part 27 made of cork or synthetic material and a gripping ring 28.
  • the neck 3 By giving the neck 3 great rigidity, it practically does not deform when the plug 26 is pressed since it is the active part 27 of the latter which retracts.
  • the rigidity of the neck 3 is relative and it is also possible to give the neck 3 a small thickness, giving it elasticity, since the invention makes it possible to control the thickness of the neck 3, since, thin or thick, the wall of the neck 3 is regular, calibrated internally and externally, and uniform. Thanks to its regularity, the radial elasticity of the neck 3 is homogeneous and ensures uniform pressure over the entire periphery of the shutter.
  • FIG 10 there is shown an embodiment Particularly advantageous of the invention, according to which the free edge of the neck 3 is used to reinforce the hold of the shutter, said neck 3 then protruding not outside but inside the container.
  • the shutter consisting here of a vaporizer 30 has a lower part 31, a dip tube 32, an actuating button 33 and a projection orifice 34.
  • the lower part 31 has at its base a flange 35 formed by the periphery a skirt 36 flexible enough to be able to deform elastically, so that by engaging the lower part 31 of the vaporizer 30 in the neck 3, the latter is firmly secured to the neck 3.
  • shutters may be simple shutters or so-called “functional" shutters, that is to say having a function other than just plugging: metering plug, sprinkler, pouring spout, pump, distributor, or the like, etc. It emerges from the above examples that shutters of different types can be used with a container neck in accordance with the invention: an ordinary cork stopper, a custom molded or thermoformed capsule, with an outer skirt for double or without skirt for simple plugging, etc.
  • FIG. 11 illustrates another embodiment called “double plugging", with the neck 3 projecting towards the outside of the container 20.
  • the shutter is here a plastic capsule 40 having a hollow central part 41 and a outer skirt 42 provided with a rim 43.
  • the capsule 40 has a circular groove engaging on the neck 3 and making it possible to provide a gap between the underside of the rim 43 and the annular closing part 2 of the component 1, in order to allow to a user to engage a finger under the rim 43 when unclogging the container.
  • the above description relates to a single-walled container neck with a clean edge.
  • FIG. 12 shows a blank 50 which has a planar annular closure part 51 surrounding a hollow housing 52 which has a side wall 53 and a bottom 54 traversed by a hole 55, this housing 52 being, here, cylindrical and placed in the center of the blank.
  • the housing 52 and the hole 55 can be obtained during thermoforming of the blank 50, or else be created later, in particular by stamping.
  • the blank 50 is placed opposite a matrix 56 having a cylindrical chamber 57 surrounded by a projecting edge 58 whose outside diameter is equal to the inside diameter of the cylindrical housing 52.
  • Opposite chamber 57 there is a cylindrical punch 59 whose outside diameter is equal to the inside diameter desired for the neck. To form the latter, the punch 59 is displaced along arrow F3 until it meets the bottom of the housing 52, opposite the hole 55, then beyond, inside said housing 52 and the chamber 57, over a distance at least equal to the desired height for the neck, which forms exactly in the annular space which results from the difference in diameters between, on the one hand the projecting edge 58 and chamber 57 itself same, and, on the other hand, the punch 59, annular space which arises when the punch 59 is engaged in the chamber 57.
  • a neck 60 with double wall has thus been created.
  • the outer wall 61 is that of the cylindrical housing 52
  • the inner wall 62 is that which results from stamping by the punch 59 of the bottom 54 of this housing 52, the two walls 61 and 62 being joined by a flange 63 coming from the folding of the synthetic material on the edge of the projecting edge 58 of the matrix 56. Between the two walls 61 and 62, there is then a gap 64 closed by the upper rim 63 and open towards the interior of the container.
  • the stamping operations described above on the planar annular part 2 are reconstituted on the bottom 54 of this housing 52.
  • the neck 60 is as a whole projecting towards the outside of the container, although its useful part is oriented towards the inside of the container.
  • the example described here is that of two circular and concentric walls 61 and 62, the outer wall 61 of which comes from the side wall 53 of the housing 52, which can be given as well as to the wall 62, by thermoforming, very varied and not necessarily circular, such as a frustoconical, tronpyramidal, hemispherical, cubic shape, etc.
  • the geometric center of the interior wall 62 may not coincide with that of the exterior wall 61, that is to say that the walls 61 and
  • the outer wall 62 may not be concentric but offset, the outer wall may be asymmetrical for aesthetic or practical reasons (to form a pouring spout for example).
  • Figures 15 and 16 equivalent to Figures 7 and 8 of the previous single-walled embodiment, show the different dissociated (see Figure 15) and associated elements (see Figure 16) of a container with a component 1 using a double wall collar, the same references referring to the same elements shown.
  • FIG. 17 shows the example of a shutter no longer formed by a standard plug 26 but by a capsule 65 of known type, made of relatively elastic molded or thermoformed synthetic material, and composed of a hollow central tip 66 , surrounded by a collar 67.
  • the capsule 65 can be simple, that is to say have a central end piece with a smooth outer wall, similar to the elastic active part 27 of the plug 26. It can also, as shown, have an outer rim 68 formed by the periphery of a skirt 69 flexible enough to be able to deform elastically when the inner wall 62 is chosen to be very rigid, as has already been described with reference to FIG. 10.
  • FIG. 18 shows a collar with two walls also allowing a double closure, with a capsule 70 of synthetic material comprising a hollow central end piece 71 surrounded by a collar 72 which is extended by a skirt outer 73 provided with a rim 74.
  • FIG. 19 an advantage of the two-walled collar has been illustrated, which comes from the fact that, thanks to the width of the rim 62, it is possible to fix therein a guarantee lid 75, possibly provided with a tongue of tearing 76. To this end, it is possible to create a continuous annular flat on the rim 63 so that the cover 75 can be fixed therein firmly, for example by gluing or welding. Access to the content cannot be done without removing the cover, and it is designed so that any withdrawal, even partial, is final (re-bonding impossible) and easy to perceive.
  • the neck of the invention can also be used for containers comprising a body, a bottom and an end formed in one piece, as illustrated in the open position in the drawing of FIG. 20a and in the closed position, after welding of the flanges peripherals, in the drawing in Figure 20b.
  • the neck 3 is here created not on an independent blank but on a component forming an integral part of the container itself, whatever its shape.
  • FIG. 20c illustrates another embodiment of a neck according to the invention formed in a component associated with a container which is in one piece in the form of a trunk body of inverted cone.
  • FIG. 20d illustrates another embodiment of the invention according to which the body and the component carrying the neck 3 are no longer subject to one another by welding or definitive bonding as in the case illustrated in FIG. 20c but by organs making it possible to dissociate the component from the body of the container.
  • the neck of the invention is also applicable to non-rigid containers, not shown, such as those which are formed by a pocket made of flexible synthetic material or aluminum complex, in which case a component provided with a neck can be attached directly. to said pocket, the whole possibly being overwrapped by a carton.
  • tubular body is meant a volume whose side wall has a preferred longitudinal direction (called longitudinal axis in the context of the invention), the section of the tube taken perpendicular to the longitudinal direction can be constant (in the case of the cylinder for example) or variable (in the case of the cone, of the pyramid for example) and of which at least one end has an opening.
  • the tubular body 20 of the container can therefore have any desired section: circular, polygonal and in particular quadrangular, etc.
  • tubular containers with square or rectangular section it is advantageous to give them rounded angles with which the corresponding added parts can cooperate without spaces for content leakage.
  • Figures 21a, 21b, 21c and 21d are partial schematic views showing a cylindrical container body with four variants for fixing a high end closure component incorporating a neck.
  • Figures 21e, 21f, 21g and 21h are partial schematic views showing a cylindrical container body with four variants for fixing a bottom component.
  • Figure 22 is a vertical sectional view of a closure component according to the invention.
  • FIGS 23a, 23b and 23c are schematic views in vertical section illustrating the assembly device of the invention according to different phases of assembly of the closure component of Figure 22 to a container body.
  • this tubular container 20 is distinguished in that the above closure component 1 (shown here incorporating a double-walled neck 60 ), obtained by thermoforming, comprises a central closing part 2 substantially perpendicular to the longitudinal axis of the tubular body 20 to ensure the obturation of the latter, and connecting members of the component 1 to the body 20 consisting of a peripheral edge continuous 5 substantially parallel to the end of the tubular body 20 so as to cooperate with said end, said peripheral edge 5 being made integral with the end of body 20 in their contact zone.
  • the tubular body 20 of the container preferably formed by curvature on itself of an originally flat sheet, has an internal face of synthetic material, cardboard or similar material, the aforesaid contact zone of its at least one end with the peripheral edge 5 of the component 1 is advantageously coated or made up of a weldable or bondable material in order to make a connection in the contact zone by welding or by bonding.
  • the method of assembling component 1 to the tubular body of a container 20 is also new in principle and therefore consists simply:
  • FIGS. 21 a, b, c, d, e, f, g and h illustrate this new concept of container 20 represented here in a cylindrical shape with circular section having two diametrically opposite openings. closed at its upper end by a component 1 with a double-walled filling neck 60 (cf. FIGS. 21a, 21b, 21c, 21d) and at its lower end by a bottom component 3 (cf. FIGS. 21e, f, g and h).
  • the container 20 to which the component 1 must be fixed by its peripheral edge 5 can be of different types, since the component 1 can be engaged inside the body 20 of the container, according to two possible variants: in FIG. 21a, the component 1 is oriented to constitute a sort of bowl whose edge 5 must be fixed inside the body 20, the flat part 2 being located inside the contour of the body 20, - in FIG. 21b, the part closure 2 of component 1 is located at the edge of the body 20, the edge 5 having to be fixed inside the body 20.
  • a tool which can be of any known type such as an electrode, a heating wheel, etc., and on the other hand a counterpart ensuring the support of the part to be welded.
  • a tool which can be of any known type such as an electrode, a heating wheel, etc.
  • a counterpart ensuring the support of the part to be welded.
  • the welding device To perform the welding of the edge 5 and of the body 20 according to the arrangement in FIG. 21b, the welding device must include a part located inside the body 20, which supposes that the body 20 is open, that is to say i.e. without bottom component 23 which must therefore be attached and welded after attachment of component 1. Consequently, with the arrangement in FIG. 21b, the bottom 23 must be able to be fixed from outside the container, as shown on the drawings of Figures 21e and f, and corresponding to component 1 of Figure 21a.
  • the positioning of the outline of the blank, and therefore its concentricity with respect to the body 20, depends on the action of the tool for cutting the blank and the location of this tool is not rigorously established with respect to the center of the draft. As a result, the positioning of component 1 may be somewhat inaccurate.
  • the component 1 can also have an extension greater than the section of the body 20, so that an edge 5a is placed outside the body 20 where it is fixed. This situation is analogous to that of FIG. 21b, that is to say that part of the welding device must be introduced into the body 20.
  • this problem is easily solved because the peripheral edge 5 of said component 1 has two parallel walls 5b and 5c in one piece joined by a fold 5d of their constituent material and separated by an open space forming a continuous groove adopting in section the general shape of a U with its two branches 5b and 5ç_ and its base 5d.
  • the width of this U-shaped groove is substantially equal to the thickness of the end of the wall of the tubular body 20 so that the end of said body can be fully inserted into said groove.
  • the positioning of the annular space formed by the U-shaped groove is itself very precise, so that the component 1 is positioned on the body 20 in a perfectly centered manner.
  • the outer edge 5ç_ the outline of which is imprecise, can have, without drawback, a variable height all around the body 20 after fixing, the two edges 5b and 5c. not necessarily having the same height.
  • the outer edge 5ç_ can therefore be quite small, in the manner of an invisible crimping edge.
  • the component 1 is fixed to the body 20 by the two edges 5b and 5c, that is to say internally and externally, which guarantees an excellent seal, in particular thanks to the covering of the edge of the body 20 by the flange 5d resting on it.
  • This structure, from the point of view of the welding of the component 1 on the body 20, is similar to that of FIG. 21a, namely that this welding can be carried out from the outside of the container. This preferred embodiment will be described in more detail a little later in the description.
  • the bottom 23 can have different forms independent of those of the component 1, except as regards its attachment to the body 20 which requires coordination with the component 1, the bodies for attachment to the body 20 having to be tuned. So :
  • the bottom 23 has an edge 23a similar to the edge 5 of the end 1 and is placed in the body 20 in an identical manner to the component 1 in FIG. 21a,
  • the bottom 23 has two parallel edges 23b and 23ç_ (joined at their upper part by a rim 23d and separated by a U-shaped groove) and is placed in the body 20 in an identical manner to the component 1 of FIG. 21d,
  • thermoforming of the component 1 carrying a neck or of the bottom component 23 makes it possible to give these components very varied forms according to the applications of the invention: substantially planar ( Figures 1 to 2 lf), tronpyramidal, frustoconical ( Figures 21g and 21h ), etc.
  • the central closing parts 24 of the bottoms 23 of the containers 20 have been shown in the drawings of FIGS. 21g and 21h with a concave preform capable of coming to conform to the convex preform that the neck forms with possibly its system for plugging a component. 1 of a container arranged below, to allow stacking of the two containers.
  • FIG. 22 illustrates in more detail a particular profile of a closure component such as component 1 shown in section along a vertical plane in the drawing of Figure 21d, it being understood that the same profile can be adapted to the component 23 shown in the drawing of Figure 21f.
  • this arrangement is preferably chosen by the applicant because the end of the component 1 is fixed to the body 20 by the two arms 5b and 5ç_ of the U-shaped groove, that is to say internally and externally, which guarantees an excellent seal, in particular thanks to the covering of the edge of the body 20 by the rim 5d bearing on it.
  • this structure makes it possible to weld from the outside of the container 20.
  • the original profile of the peripheral edge 5 of the component 1 illustrated in FIG. 22 is intended to complete the quality of assembly of the component 1 to the body of container 20, while preserving the seal and overall aesthetics of the latter.
  • the external branch 5c of the U-shaped peripheral groove is shorter than the internal branch 5b and is extended by a peripheral skirt 5c '.
  • the opening angle ⁇ (of the order of 30 °) that this skirt forms with the plane of symmetry of the component 1 has been judiciously chosen large enough to facilitate guiding the end of the body 20 in the U of the edge groove 5 and small enough to allow its flap by thermoforming against the outer wall of the end of the body 20 introduced into the U-shaped groove.
  • the length "1" (of the order of 3.5 mm) has been judiciously chosen long enough to act as a lever arm allowing it to be folded during the assembly operation by thermoforming against the external wall of the end of the body 20 introduced into said groove, and short enough to avoid an irregular stretch of the material resulting in the formation of unsightly "waves" during the assembly operation by thermoforming.
  • the internal branch 5b of the U-shaped peripheral groove offers in horizontal section a surface of its external wall (which is the external diameter when the tubular body takes the form of a right cylinder) slightly greater than the surface of the inner wall of the end of the body 20 to ensure close contact between the two said walls.
  • This same branch 5b has a height (of the order of 5 to 10 mm) which is sufficient to ensure good mechanical strength and an active surface of sufficient adhesion between the two said walls to ensure their assembly by heat sealing.
  • the portion ensuring the connection of the free end of the internal branch 5b of said peripheral U-shaped groove to the closure part 2 (shown plane in this example) of the component 1 adopts a slope (and more particularly a curve) sufficient to facilitate the guiding of the end of the body 20 in said groove of the U.
  • both this curved portion of connection between the internal branch 5b. and the annular part 2 that the peripheral skirt 5 'of the extension of the external branch 5' define a funnel guiding the penetration of the end of the container body 20 into the U-shaped groove of the peripheral edge 5, in particular when this operation is fully automated.
  • FIGS. 23a, 23b and 23c schematically illustrate an original assembly device which the applicant proposes to achieve this heat-sealing operation.
  • this device is constituted by a heat-sealing tool referenced 0 as a whole, comprising at least one matrix M formed by a heating sleeve which, animated by a movement back and forth along of the longitudinal axis of the container body 20, has in horizontal section an inner surface (diameter if the body 20 is a cylinder) slightly greater than that of the outer wall of the outer branch 5ç_ of the peripheral edge 5 of the component 1 so to come into contact during its downward movement (arrow D m ) against the peripheral skirt 5ç_ 'which it folds down and which it thermally deforms against the external wall of the end of the body 20, in the extension axis of the external branch 5ç_.
  • the leading edge M 'of the above heating sleeve forming the matrix M is flared at an opening angle ⁇ ' (of the order of 15 to 30 °) relative to the longitudinal axis of the container body 20, which is preferably slightly less than that of the opening angle of the aforesaid peripheral skirt 5c 'so that the operation of flap and plating by heat deformation against the external wall of the the end of the body 20 takes place gradually at the movement of lowering (arrow D m ) of the sleeve M.
  • Figure 23b shows the matrix
  • the above heat-sealing tool 0 comprises a heating punch P which, also driven in a movement back and forth along the longitudinal axis of the container body 20, externally adopts a frustoconical shape whose lower base has a surface (diameter if the body 20 is a cylinder) smaller than that of the internal wall of the internal branch 5b of the U of the peripheral edge 5 of the component 1 and whose upper base has a larger surface (diameter if the body 20 is a cylinder) than that of said internal wall of the internal branch 5b_ such that the oblique external wall P 'of the punch P exerts pressure on the upper end of the internal wall of the internal branch 5b of the peripheral edge 5 of the component 1 proportional to the downward movement (arrow Dp) of said punch, to a low limit point where the end of the container body 20 clamped inside the U-shaped groove of the peripheral edge 5, is compr mapped at most between the matrix M and the punch P.
  • the heating temperature of the heating punch P intended to ensure an internal heat-sealing is higher than that of the matrix M intended to ensure an external thermoforming of the external skirt 5c_ ', or even a thermosetting.
  • the heating punch P begins its descent (arrow Dp) when the descent movement (arrow D m ) of the matrix M is completed, thus making it possible to design a automatic thermosealing tool 0 where the matrix M and the punch P arranged superimposed move along the same column with limit stop stops easy to implement to ensure an automatic successive sequence of the two thermoforming operations or seaming for the matrix M and heat sealing for the punch P.
  • the container of the invention can be in extremely varied forms and have multiple applications such as
  • Such a container is therefore likely to meet almost all of the requirements of the packaging market, especially for processing small and medium quantities that do not justify the heavy investment required to create the containers at the place of filling, at the head of the line. conditioning.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
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Abstract

The invention concerns a container neck (3) obtained from a synthetic material sheet by thermoforming process. Said container neck (3) is characterised in that said sheet has a given nominal thickness (e), the wall forming the neck (3) has the same thickness without noticeable thinning over its entire useful length, that is over its inner surface height against which is to be located a plug (26) of a particular type engaged in the neck (3) when the container is closed. The invention also concerns a method for making said container neck (3) and a container (20) with its assembling method and the device for implementing the method. The invention is useful for packaging products capable of being extracted from the container by successive withdrawals, involving plugging and unplugging several times, provided that the successive plugging operations ensure that the container remains sealed.

Description

Col de contenant avec son procédé de fabrication, et contenant avec son procédé et son dispositif d'assemblage.Container neck with its manufacturing process, and container with its process and assembly device.
La présente invention concerne le domaine du conditionnement et, plus particulièrement l'emballage de produits pouvant être prélevés hors d'un contenant par des retraits successifs, ce qui implique plusieurs bouchages et débouchages, étant précisé que les bouchages successifs doivent toujours garantir l'étancheité du contenant . De tels contenants s'appliquent particulièrement aux produits coulants, qu'ils soient liquides, crémeux ou pulvérulents.The present invention relates to the field of packaging and, more particularly the packaging of products which can be removed from a container by successive withdrawals, which involves several closings and uncorkings, it being specified that successive closings must always guarantee leaktightness of the container. Such containers are particularly applicable to flowable products, whether liquid, creamy or powdery.
Le procédé décrit dans le brevet EP 0 593 728 permet d'obtenir des contenants en matière synthétique portant un obturateur adapté exactement à un col entourant l'orifice du contenant et dont le col est obtenu au moyen d'un poinçon chauffant engagé à force dans un trou ménagé dans une feuille thermoplastique. Un contenant de ce type donne satisfaction mais la solution technique ne s'applique pas à tous les types de bouchage car la présence d'un obturateur unique et indissociable du contenant s'oppose à la réalisation d'emballages particuliers. On peut citer notamment les flacons contenant un produit à diffuser au moyen d'un vaporisateur, celui-ci devant évidemment s'adapter sur l'orifice. Il en est de même pour les contenants devant être associés à un obturateur de type standard tel qu'un bouchon en liège ou en matière synthétique.The process described in patent EP 0 593 728 makes it possible to obtain plastic containers carrying a shutter exactly adapted to a neck surrounding the orifice of the container and the neck of which is obtained by means of a heating punch engaged by force in a hole in a thermoplastic sheet. A container of this type is satisfactory but the technical solution does not apply to all types of corking because the presence of a single shutter and inseparable from the container precludes the production of special packaging. Mention may in particular be made of the bottles containing a product to be diffused by means of a vaporizer, the latter obviously having to adapt to the orifice. It is the same for containers to be associated with a standard type shutter such as a cork or plastic stopper.
L'objet de la présente invention est d'apporter une solution nouvelle permettant de généraliser l'usage d'un col lisse calibré autour d'un orifice à toute sorte de contenants en différentes matières . Ainsi, l'invention a pour objet un procédé de fabrication d'un col de contenant comprenant un orifice entouré d'un col qui est continûment cylindrique et qui est réalisé par thermoformage d'une feuille en matière synthétique, remarquable en ce que l'on soumet une feuille en matière synthétique à une opération de thermoformage afin d'obtenir une ébauche d'un composant du contenant et que l'on ménage dans cette ébauche, soit lors du thermoformage soit ultérieurement, un trou de diamètre inférieur à celui voulu pour l'orifice, puis qu'après refroidissement de l'ébauche, on procède à une opération d'emboutissage sur ladite ébauche, au moyen d'une matrice de maintien et d'un poinçon cylindrique introduit à force dans le trou, ce poinçon ayant un diamètre extérieur égal au diamètre voulu pour l'orifice, cette opération d'emboutissage se faisant à froid afin de déformer la matière synthétique mécaniquement, c'est-à-dire à une température inférieure à celle du thermoformage, sans aucun amincissement de la feuille d'origine, pour créer le col hors du plan initial de l'ébauche, puis que l'on retire le poinçon et qu'on libère la pièce obtenue.The object of the present invention is to provide a new solution making it possible to generalize the use of a smooth neck calibrated around an orifice to all kinds of containers made of different materials. Thus, the subject of the invention is a method of manufacturing a container neck comprising an orifice surrounded by a neck which is continuously cylindrical and which is produced by thermoforming a sheet of synthetic material, remarkable in that the a sheet of synthetic material is subjected to a thermoforming operation in order to obtain a blank for a component of the container and which is cleaned in this blank, either during thermoforming either later, a hole with a diameter smaller than that desired for the orifice, then after cooling the blank, a drawing operation is carried out on said blank, by means of a holding and a cylindrical punch forced into the hole, this punch having an outside diameter equal to the desired diameter for the orifice, this stamping operation being carried out cold in order to deform the synthetic material mechanically, i.e. a temperature lower than that of thermoforming, without any thinning of the original sheet, to create the neck out of the initial plane of the blank, then that the punch is removed and that the piece obtained is released.
L'invention a aussi pour objet le col de contenant obtenu selon ce procédé et qui est réalisé par thermoformage d'une feuille en matière synthétique, remarquable en ce que la feuille ayant une épaisseur nominale donnée, la paroi formant le col a cette même épaisseur sans amincissement perceptible sur toute sa hauteur utile, c'est-à-dire sur la hauteur de sa face intérieure contre laquelle doit se situer un obturateur de type quelconque engagé dans le col lorsque le contenant est obturé.The subject of the invention is also the container neck obtained according to this process and which is produced by thermoforming a sheet of synthetic material, remarkable in that the sheet having a given nominal thickness, the wall forming the neck has this same thickness without noticeable thinning over its entire useful height, that is to say over the height of its inner face against which must be a shutter of any type engaged in the neck when the container is closed.
L'invention sera mieux comprise à la lecture de la description détaillée ci-après faite en référence aux dessins annexés de deux modes de réalisation d'un col de contenant conformes à l'invention et donnés à titre d'exemples indicatifs et non limitatifs.The invention will be better understood on reading the detailed description below made with reference to the accompanying drawings of two embodiments of a container neck in accordance with the invention and given by way of indicative and non-limiting examples.
La figure 1 est une vue schématique en perspective d'un composant de ce col de contenant.Figure 1 is a schematic perspective view of a component of this container neck.
La figure 2 est une vue schématique en perspective d'une ébauche thermoformée d'un tel composant, avant emboutissage.Figure 2 is a schematic perspective view of a thermoformed blank of such a component, before stamping.
La figure 3 est une vue schématique illustrant une phase de procédé de fabrication d'un col de contenant connu de l'état de la technique.Figure 3 is a schematic view illustrating a phase of the manufacturing process of a container neck known from the prior art.
Les figures 4, 5 et 6 sont des vues schématiques illustrant la phase d'emboutissage du procédé de fabrication d'un premier mode de réalisation d'un col de contenant conforme à l'invention.Figures 4, 5 and 6 are schematic views illustrating the stamping phase of the manufacturing process of a first embodiment of a container neck according to the invention.
La figure 7 est une vue schématique en coupe éclatée montrant un contenant adapté à un col de contenant selon le premier mode de réalisation de l'invention avec un bouchon standard.Figure 7 is a schematic exploded section view showing a container adapted to a container neck according to the first embodiment of the invention with a standard cap.
La figure 8 est une vue schématique en coupe du contenant de la figure 7 après assemblage, remplissage et bouchage. La figure 9 est une vue schématique en coupe montrant un contenant similaire à celui de la figure 8, avec une disposition inverse du col de contenant.Figure 8 is a schematic sectional view of the container of Figure 7 after assembly, filling and capping. Figure 9 is a schematic sectional view showing a container similar to that of Figure 8, with a reverse arrangement of the container neck.
La figure 10 est une vue schématique en coupe montrant la présence d'un obturateur particulier sur le col de contenant selon la disposition de ce dernier illustrée à la figure 9.FIG. 10 is a schematic sectional view showing the presence of a particular obturator on the container neck according to the arrangement of the latter illustrated in FIG. 9.
La figure 11 est une vue schématique partielle illustrant un autre exemple de bouchage du col de contenant des figures 7 et 8.FIG. 11 is a partial schematic view illustrating another example of closure of the container neck of FIGS. 7 and 8.
Les figures 12, 13 et 14 sont des vues schématiques illustrant la phase d'emboutissage du procédé de fabrication d'un deuxième mode de réalisation d'un col de contenant conforme à 1 ' invention.Figures 12, 13 and 14 are schematic views illustrating the stamping phase of the manufacturing process of a second embodiment of a container neck according to one invention.
La figure 15 est une vue schématique en coupe éclatée montrant un contenant adapté à un col de contenant selon le deuxième mode de réalisation de l'invention avec un bouchon standard.Figure 15 is a schematic exploded section view showing a container adapted to a container neck according to the second embodiment of the invention with a standard plug.
La figure 16 est une vue schématique en coupe du contenant de la figure 15 après assemblage, remplissage et bouchage.Figure 16 is a schematic sectional view of the container of Figure 15 after assembly, filling and capping.
La figure 17 est une vue schématique en coupe montrant le col de contenant des figures 15 et 16 avec un autre exemple de bouchage.Figure 17 is a schematic sectional view showing the container neck of Figures 15 and 16 with another example of closure.
Les figures 18 et 19 est une vue schématique en coupe du deuxième mode de réalisation d'un col de contenant avec deux autres exemples de bouchage. La figure 30 est une vue schématique partielle illustrant une variante conforme à l'invention permettant de réaliser un corps cylindrique de contenant à partir d'une feuille de carton enduite d'une couche de matière soudable.Figures 18 and 19 is a schematic sectional view of the second embodiment of a container neck with two other examples of closure. Figure 30 is a partial schematic view illustrating a variant according to the invention for producing a cylindrical container body from a sheet of cardboard coated with a layer of weldable material.
Les figures 20a, 20b, 20c et 20d sont des vues schématiques montrant un composant adoptant le col de l'invention sous diverses formes d'association à un contenant. En se reportant à la figure 1, on voit une pièce 1 obtenue par thermoformage d'une feuille en matière synthétique et présentant une partie de fermeture 2 (qui est annulaire plane dans l'exemple illustré), un col saillant central 3 entourant un orifice 4, et un bord périphérique 5. Cette pièce 1, destinée à être associée à un corps de contenant pour en constituer un composant, sera plus communément dénommée "composant" dans le contexte de l'invention. La description du col de contenant qui suit se rapporte à un contenant tubulaire cylindrique, le composant 1 sur lequel est situé le col constituant une extrémité du contenant.Figures 20a, 20b, 20c and 20d are schematic views showing a component adopting the neck of the invention in various forms of association with a container. Referring to FIG. 1, we see a part 1 obtained by thermoforming a sheet of synthetic material and having a closing part 2 (which is flat annular in the example illustrated), a central projecting neck 3 surrounding an orifice 4, and a peripheral edge 5. This part 1, intended to be associated with a container body to constitute it a component, will be more commonly called "component" in the context of the invention. The description of the container neck which follows relates to a cylindrical tubular container, component 1 on which the neck is located constituting one end of the container.
Pour obtenir le composant 1 de la figure 1, on commence par thermoformer une feuille de matière synthétique pour créer une ébauche 6, représentée sur la figure 2, comprenant seulement une partie centrale 7 et le bord périphérique 5. Au centre de l'ébauche 6, se trouve un trou 8 de faible diamètre qui peut être créé lors du thermoformage ou par perçage ultérieur. On a pensé pouvoir créer le col 3 lors du thermoformage mais on s'est aperçu qu'en raison des tensions de la matière synthétique au moment du thermoformage, à cause de sa température assez élevée et de son étirement, ainsi que lors de son refroidissement après le thermoformage, les faces intérieure et extérieure du col 3 étaient irrégulières, ce qui rendait impossible le bouchage étanche de l'orifice 4.To obtain the component 1 of FIG. 1, one begins by thermoforming a sheet of synthetic material to create a blank 6, represented in FIG. 2, comprising only a central part 7 and the peripheral edge 5. In the center of the blank 6 , there is a small diameter hole 8 which can be created during thermoforming or by subsequent drilling. We thought we could create the neck 3 during thermoforming but we realized that due to the tensions of the synthetic material at the time of thermoforming, because of its fairly high temperature and its stretching, as well as during its cooling after thermoforming, the inner and outer faces of the neck 3 were irregular, which made it impossible to seal the orifice 4 tightly.
Une première solution à ce problème est apportée par le brevet EP 0 593 728, cette solution consistant non pas à créer le col lors du thermoformage de la pièce, mais de passer par l'étape d'une ébauche intermédiaire percée d'un trou central, puis à utiliser un poinçon chauffant A qui est appliqué face au trou et qui est poussé sur une certaine longueur et à une certaine vitesse pour que la matière synthétique constitutive de l'ébauche B se ramollisse et se déforme comme représenté sur la figure 3, pour constituer le col C. Par ce procédé antérieur, la face intérieure D du col C est régulière et a un diamètre précis sur toute sa hauteur grâce au poinçon chauffant A, mais le ramollissement a pour effet d'étirer la matière synthétique et, par conséquent de l'amincir. On voit ainsi qu'à partir de l'épaisseur nominale e. de la feuille d'origine, la matière synthétique a une épaisseur un peu moindre e, près du col C, une épaisseur e_j encore moindre à la base du col C et qu'au sommet de ce col C, la face interne D et la face externe E sont séparées par une épaisseur e_, nettement plus faible que l'épaisseur nominale e. Cette géométrie est acceptable lorsque le contenant est associé à un obturateur créé lorsque l'on thermoforme simultanément le contenant lui-même, l'extrémité devant porter le col et l'obturateur. En effet, cela garantit que le contact entre l'obturateur et la face intérieure D du col C se fera entre deux organes de même matière, lequel contact monomatière, ajouté au calibrage de la face intérieure D, permet un bouchage d'origine et des rebouc ages successifs procurant une excellente étanchéité pendant tout le temps nécessaire au prélèvement du contenu par fractions. Mais la présence permanente d'un obturateur de type unique est une contrainte qui disqualifie le contenant pour bien des applications, de sorte que le besoin existe d'un contenant simple, bon marché et possédant un système de bouchages et de rebouchages successifs étanches, au moyen d'obturateurs indépendants et de différents types en fonction des applications .A first solution to this problem is provided by patent EP 0 593 728, this solution not consisting in creating the neck during the thermoforming of the part, but in going through the stage of an intermediate blank pierced with a central hole. , then to use a heating punch A which is applied facing the hole and which is pushed over a certain length and at a certain speed so that the synthetic material constituting the blank B softens and deforms as shown in FIG. 3, to form the neck C. By this prior process, the inner face D of the neck C is regular and has a precise diameter over its entire height thanks to the heating punch A, but the softening has the effect of stretching the synthetic material and, by therefore to slim it down. It can thus be seen that from the nominal thickness e. of the original sheet, the synthetic material has a slightly less thickness e, near the neck C, a thickness e_ j even less at the base of the neck C and that at the top of this neck C, the internal face D and the external face E are separated by a thickness e_, significantly smaller than the nominal thickness e. This geometry is acceptable when the container is associated with a shutter created when the container itself is thermoformed simultaneously, the end having to carry the neck and the shutter. Indeed, this guarantees that the contact between the shutter and the inner face D of the neck C will be between two bodies of the same material, which single-material contact, added to the calibration of the inner face D, allows an original closure and successive re-coatings providing an excellent seal during all the time necessary for the removal of the contents in fractions. But the permanent presence of a single type shutter is a constraint which disqualifies the container for many applications, so that there is a need for a simple container, inexpensive and having a system of successive closures and recaps, at means of independent shutters and of different types according to the applications.
Avec la solution connue que l'on vient de décrire, le col a bien des faces intérieure et extérieure lisses mais l'amincissement de la matière constitutive a pour conséquence que le col n'est pas rigide et ne pourrait pas supporter un obturateur qui ne serait pas rigoureusement calibré et/ou qui n'aurait pas exactement la hauteur voulue, coordonnée à celle du col. Le bord supérieur du col est très mince et d'ailleurs assez facilement déformable ce qui constitue un point faible.With the known solution that we have just described, the neck has many smooth inner and outer faces but the thinning of the constituent material has the consequence that the neck is not rigid and could not support a shutter which does not would not be rigorously calibrated and / or that would not have exactly the desired height, coordinated with that of the collar. The upper edge of the neck is very thin and moreover quite easily deformable, which constitutes a weak point.
C'est pourquoi, selon l'invention, on procède d'une manière tout à fait différente de celle qui a été décrite dans le brevet identifié ci-dessus, en partant bien de l'ébauche 6, mais pour obtenir le col 3, on procède par emboutissage mécanique à froid, afin d'éviter l'amincissement de la matière, au lieu d'utiliser un poinçon chauffant A agissant par étirement de ladite matière.This is why, according to the invention, the procedure is entirely different from that which has been described in the patent identified above, starting well from the blank 6, but to obtain the neck 3, this is done by cold mechanical stamping, in order to avoid the thinning of the material, instead of using a heating punch A acting by stretching said material.
En se reportant aux figures 4, 5 et 6, on voit que l'on dispose l'ébauche 6 face à un dispositif qui comprend essentiellement une matrice de maintien 10 et un poinçon d'emboutissage 11. La matrice 10 possède une chambre cylindriqueReferring to Figures 4, 5 and 6, we see that we have the blank 6 facing a device which essentially comprises a holding die 10 and a stamping punch 11. The die 10 has a cylindrical chamber
12 dont le diamètre (intérieur) correspond à celui de la face extérieure 3a du col 3. Cela revient à dire que la différence entre les diamètres de la chambre 12 et du poinçon 11 est égale à l'épaisseur nominale e. de la feuille de matière synthétique d'origine. Après positionnement précis de l'ébauche 6 contre la matrice 10, on déplace le poinçon 11 selon la flèche FI jusqu'à ce qu'il rencontre la partie centrale 7 à l'aplomb du trou 8, puis, au-delà, à l'intérieur de la chambre 12 et du poinçon 11 et qui prend naissance lorsque le poinçon 11 est engagé dans la chambre 12. Après emboutissage, le poinçon 11 est retiré selon la flèche F2, la pièce 1 formée est séparée de la matrice 10 et évacuée pour sa fixation ultérieure à un corps de contenant.12 whose diameter (inside) corresponds to that of the face outer 3a of the neck 3. This amounts to saying that the difference between the diameters of the chamber 12 and the punch 11 is equal to the nominal thickness e. of the original plastic sheet. After precise positioning of the blank 6 against the die 10, the punch 11 is displaced according to the arrow FI until it meets the central part 7 directly above the hole 8, then, beyond inside the chamber 12 and the punch 11 and which arises when the punch 11 is engaged in the chamber 12. After stamping, the punch 11 is removed according to arrow F2, the part 1 formed is separated from the matrix 10 and evacuated for subsequent attachment to a container body.
On comprend que la hauteur du col 3 dépend du diamètre du trou 8, c'est-à-dire que le col 3 est d'autant plus haut que le diamètre du trou 8 est petit et, à l'inverse, qu'un trou 8 de grand diamètre générera un col 3 très peu proéminent.We understand that the height of the neck 3 depends on the diameter of the hole 8, that is to say that the neck 3 is all the higher the smaller the diameter of the hole 8 and, conversely, that a hole 8 of large diameter will generate a neck 3 which is not very prominent.
Comme dit plus haut, l'emboutissage se fait à froid mais il faut préciser que cet adjectif signifie que la température du poinçon 11 et/ou de la matrice 10, est inférieure à celle qui pourrait provoquer l'étirement et donc un amincissement de la matière synthétique. Une température un peu supérieure à la température ambiante est en effet souhaitable, non pour déformer la matière synthétique, mais pour faciliter l'emboutissage sans cassure. L'emboutissage à froid nécessite la présence de la matrice 10 dont la chambre doit être précisément calibrée puisqu'elle contribue à la formation du col 3. Sachant que l'épaisseur e de la matière au sommet du col 3, après emboutissage, restera inchangée, il devient possible de donner au col 3 une rigidité exactement adaptée aux différentes applications possibles puisqu'il suffit de choisir l'épaisseur de la feuille d'origine. La figure 7 illustre un col 3 faisant partie intégrante d'un composant 1 fermant l'extrémité haute d'un contenant 20 destiné à être rempli par l'orifice 4 d'un produit quelconque, plus ou moins fluide, de nature liquide, poudreuse, granulaire, pâteuse, crémeuse, etc. Ce contenant 20 possède un corps tubulaire cylindrique qui, formé d'une partie extérieure 21 et d'un revêtement intérieur 22 façonné dans un matériau différent, reçoit à son extrémité basse un fond 23 comprenant une partie centrale pleine 24 et un bord périphérique 25. Après remplissage du contenant 20 par l'orifice 4, on ferme ledit orifice 4 au moyen d'un obturateur qui, ici, est constitué par un bouchon standard 26, comprenant une partie active élastique 27 en liège ou en matière synthétique et une couronne de préhension 28.As said above, the stamping is done cold but it should be specified that this adjective means that the temperature of the punch 11 and / or of the matrix 10, is lower than that which could cause stretching and therefore a thinning of the synthetic material. A temperature slightly higher than room temperature is indeed desirable, not to deform the synthetic material, but to facilitate stamping without breaking. Cold stamping requires the presence of the die 10 whose chamber must be precisely calibrated since it contributes to the formation of the neck 3. Knowing that the thickness e of the material at the top of the neck 3, after stamping, will remain unchanged , it becomes possible to give the neck 3 a rigidity exactly suited to the different possible applications since it suffices to choose the thickness of the original sheet. FIG. 7 illustrates a neck 3 forming an integral part of a component 1 closing the upper end of a container 20 intended to be filled by the orifice 4 of any product, more or less fluid, of liquid, powdery nature , granular, pasty, creamy, etc. This container 20 has a cylindrical tubular body which, formed of an external part 21 and an internal coating 22 shaped in a different material, receives at its lower end a bottom 23 comprising a solid central part 24 and a peripheral edge 25. After filling the container 20 with the orifice 4, said orifice 4 is closed by means of a shutter which, here, is constituted by a plug standard 26, comprising an elastic active part 27 made of cork or synthetic material and a gripping ring 28.
En donnant au col 3 une grande rigidité, il ne se déforme pratiquement pas lors de l'enfoncement du bouchon 26 puisque c'est la partie active 27 de ce dernier qui se rétracte. Ceci est une disposition caractéristique de l'invention qui résulte du procédé de fabrication du col 3. Mais s 'agissant de matière synthétique, la rigidité du col 3 est relative et l'on peut aussi donner au col 3 une épaisseur faible, lui donnant de l'élasticité, puisque l'invention permet de maîtriser l'épaisseur du col 3, dès lors que, mince ou épaisse, la paroi du col 3 est régulière, calibrée intérieurement et extérieurement, et uniforme. Grâce à sa régularité, l'élasticité radiale du col 3 est homogène et assure une pression uniforme sur toute la périphérie de l'obturateur. Le diamètre intérieur du col étant exactement égal à celui que l'on souhaite, il est possible d'adapter la pression exercée sur l'obturateur et, donc, d'obtenir le niveau d'étanchéité recherché. Ainsi, une autre conséquence positive de l'exactitude du diamètre du col est de permettre de minorer les contraintes de tolérance de fabrication de l'obturateur. Sur la figure 8, on voit le contenant 20 terminé, rempli et fermé. On observe que le col 3 est orienté vers l'extérieur du contenant 20, de sorte que le composant 1 adopte une forme générale de cuvette et que la partie annulaire plane de fermeture 2 est située dans le contour du corps 20. Sur la figure 9, au contraire, le col 3 est orienté selon une orientation inverse vers l'intérieur du contenant 20, et la partie annulaire 2 est alignée avec la bordure du corps 20.By giving the neck 3 great rigidity, it practically does not deform when the plug 26 is pressed since it is the active part 27 of the latter which retracts. This is a characteristic arrangement of the invention which results from the process for manufacturing the neck 3. But being synthetic material, the rigidity of the neck 3 is relative and it is also possible to give the neck 3 a small thickness, giving it elasticity, since the invention makes it possible to control the thickness of the neck 3, since, thin or thick, the wall of the neck 3 is regular, calibrated internally and externally, and uniform. Thanks to its regularity, the radial elasticity of the neck 3 is homogeneous and ensures uniform pressure over the entire periphery of the shutter. The inside diameter of the neck being exactly equal to that which is desired, it is possible to adapt the pressure exerted on the shutter and, therefore, to obtain the desired level of tightness. Thus, another positive consequence of the accuracy of the diameter of the neck is to make it possible to reduce the manufacturing tolerance constraints of the shutter. In Figure 8, we see the container 20 completed, filled and closed. It is observed that the neck 3 is oriented towards the outside of the container 20, so that the component 1 adopts a general shape of a bowl and that the planar annular closure part 2 is located in the contour of the body 20. In FIG. 9 , on the contrary, the neck 3 is oriented in a reverse orientation towards the inside of the container 20, and the annular part 2 is aligned with the edge of the body 20.
Les deux solutions sont absolument équivalentes du point de vue de l'étancheité et le choix entre elles dépend de la physionomie que l'on souhaite donner au contenant terminé.The two solutions are absolutely equivalent from the point of view of sealing and the choice between them depends on the physiognomy that one wishes to give to the finished container.
Sur la figure 10, on a représenté un mode de réalisation particulièrement intéressant de l'invention, selon lequel on utilise le bord libre du col 3 pour renforcer la tenue de l'obturateur, ledit col 3 faisant alors saillie non à l'extérieur mais à l'intérieur du contenant. L'obturateur, constitué ici d'un vaporisateur 30 présente une partie inférieure 31, un tube plongeur 32, un bouton d'actionnement 33 et un orifice de projection 34. La partie inférieure 31 présente à sa base un rebord 35 constitué par la périphérie d'une jupe 36 assez flexible pour pouvoir se déformer élastiquement, afin qu'en engageant dans le col 3 la partie inférieure 31 du vaporisateur 30, celui-ci soit assujetti fermement au col 3.In Figure 10, there is shown an embodiment Particularly advantageous of the invention, according to which the free edge of the neck 3 is used to reinforce the hold of the shutter, said neck 3 then protruding not outside but inside the container. The shutter, consisting here of a vaporizer 30 has a lower part 31, a dip tube 32, an actuating button 33 and a projection orifice 34. The lower part 31 has at its base a flange 35 formed by the periphery a skirt 36 flexible enough to be able to deform elastically, so that by engaging the lower part 31 of the vaporizer 30 in the neck 3, the latter is firmly secured to the neck 3.
Il peut s'agir d'obturateurs simples ou d'obturateurs dits "fonctionnels", c'est-à-dire ayant une fonction autre que le seul bouchage: bouchon-doseur, saupoudreur, bec verseur, pompe, distributeur, ou analogue, etc. Il ressort des exemples ci-dessus que des obturateurs de différents types peuvent être utilisés avec un col de contenant conforme à l'invention : un bouchon de liège banal, une capsule moulée ou thermoformée sur mesure, avec une jupe extérieure pour un bouchage double ou sans jupe pour un bouchage simple, etc.They may be simple shutters or so-called "functional" shutters, that is to say having a function other than just plugging: metering plug, sprinkler, pouring spout, pump, distributor, or the like, etc. It emerges from the above examples that shutters of different types can be used with a container neck in accordance with the invention: an ordinary cork stopper, a custom molded or thermoformed capsule, with an outer skirt for double or without skirt for simple plugging, etc.
Le dessin de la figure 11 illustre un autre mode de réalisation dit "bouchage double", avec le col 3 saillant vers l'extérieur du contenant 20. L'obturateur est ici une capsule en matière synthétique 40 ayant une partie centrale creuse 41 et une jupe extérieure 42 munie d'un rebord 43. La capsule 40 présente une rainure circulaire s 'engageant sur le col 3 et permettant de ménager un intervalle entre le dessous du rebord 43 et la partie annulaire de fermeture 2 du composant 1, afin de permettre à un usager d'engager un doigt sous le rebord 43 lors du débouchage du contenant.The drawing of FIG. 11 illustrates another embodiment called "double plugging", with the neck 3 projecting towards the outside of the container 20. The shutter is here a plastic capsule 40 having a hollow central part 41 and a outer skirt 42 provided with a rim 43. The capsule 40 has a circular groove engaging on the neck 3 and making it possible to provide a gap between the underside of the rim 43 and the annular closing part 2 of the component 1, in order to allow to a user to engage a finger under the rim 43 when unclogging the container.
La description qui précède concerne un col de contenant à simple paroi et à bord franc.The above description relates to a single-walled container neck with a clean edge.
On va maintenant décrire une solution plus élaborée selon laquelle le col est à double paroi. Comme précédemment, une ébauche est d'abord obtenue par thermoformage, puis le col proprement dit est créé par emboutissage à froid. Sur la figure 12, on voit une ébauche 50 qui présente une partie annulaire plane de fermeture 51 entourant un logement creux 52 qui présente une paroi latérale 53 et un fond 54 traversé d'un trou 55, ce logement 52 étant, ici, cylindrique et placé au centre de l'ébauche. Le logement 52 et le trou 55 peuvent être obtenus lors du thermoformage de l'ébauche 50, ou bien être créés ultérieurement, notamment par emboutissage. Dans sa forme de la figure 12, l'ébauche 50 est placée en regard d'une matrice 56 ayant une chambre cylindrique 57 entourée d'un bord saillant 58 dont le diamètre extérieur est égal au diamètre intérieur du logement cylindrique 52. En regard de la chambre 57, se trouve un poinçon cylindrique 59 dont le diamètre extérieur est égal au diamètre intérieur voulu pour le col. Pour former celui-ci, on déplace le poinçon 59 selon la flèche F3 jusqu'à ce qu'il rencontre le fond du logement 52, en regard du trou 55, puis au-delà, à l'intérieur dudit logement 52 et de la chambre 57, sur une distance au moins égale à la hauteur voulue pour le col, lequel se forme exactement dans l'espace annulaire qui résulte de la différence des diamètres entre, d'une part le bord saillant 58 et de la chambre 57 elle- même, et, d'autre part, le poinçon 59, espace annulaire qui prend naissance lorsque le poinçon 59 est engagé dans la chambre 57. On a ainsi créé un col 60 à double paroi. La paroi extérieure 61 est celle du logement cylindrique 52, et la paroi intérieure 62 est celle qui résulte de l'emboutissage par le poinçon 59 du fond 54 de ce logement 52, les deux parois 61 et 62 étant réunies par un rebord 63 provenant du repliement de la matière synthétique sur l'arête du bord saillant 58 de la matrice 56. Entre les deux parois 61 et 62, se trouve alors un intervalle 64 fermé par le rebord supérieur 63 et ouvert en direction de l'intérieur du contenant. En somme, après la réalisation du logement creux 52, on reconstitue sur le fond 54 de ce logement 52, les opérations d'emboutissage précédemment décrites sur la partie annulaire plane 2. On obtient alors le composant 1 de la figure 14 qui a pour caractéristique que le col 60 est dans son ensemble saillant vers l'extérieur du contenant, bien que sa partie utile soit orientée vers l'intérieur du contenant. L'exemple décrit ici est celui de deux parois 61 et 62 circulaires et concentriques dont la paroi extérieure 61 provenant de la paroi latérale 53 du logement 52, à laquelle on peut donner ainsi qu'à la paroi 62, par thermoformage, des formes très variées et non nécessairement circulaires, telle qu'une forme tronconique, tronpyramidale, hémisphérique, cubique, etc. De même, le centre géométrique de la paroi intérieure 62 peut ne pas coïncider avec celui de la paroi extérieure 61, c'est-à-dire que les parois 61 etWe will now describe a more elaborate solution according to which the neck is double walled. As before, a blank is first obtained by thermoforming, then the neck itself is created by cold stamping. FIG. 12 shows a blank 50 which has a planar annular closure part 51 surrounding a hollow housing 52 which has a side wall 53 and a bottom 54 traversed by a hole 55, this housing 52 being, here, cylindrical and placed in the center of the blank. The housing 52 and the hole 55 can be obtained during thermoforming of the blank 50, or else be created later, in particular by stamping. In its form of FIG. 12, the blank 50 is placed opposite a matrix 56 having a cylindrical chamber 57 surrounded by a projecting edge 58 whose outside diameter is equal to the inside diameter of the cylindrical housing 52. Opposite chamber 57, there is a cylindrical punch 59 whose outside diameter is equal to the inside diameter desired for the neck. To form the latter, the punch 59 is displaced along arrow F3 until it meets the bottom of the housing 52, opposite the hole 55, then beyond, inside said housing 52 and the chamber 57, over a distance at least equal to the desired height for the neck, which forms exactly in the annular space which results from the difference in diameters between, on the one hand the projecting edge 58 and chamber 57 itself same, and, on the other hand, the punch 59, annular space which arises when the punch 59 is engaged in the chamber 57. A neck 60 with double wall has thus been created. The outer wall 61 is that of the cylindrical housing 52, and the inner wall 62 is that which results from stamping by the punch 59 of the bottom 54 of this housing 52, the two walls 61 and 62 being joined by a flange 63 coming from the folding of the synthetic material on the edge of the projecting edge 58 of the matrix 56. Between the two walls 61 and 62, there is then a gap 64 closed by the upper rim 63 and open towards the interior of the container. In summary, after the hollow housing 52 has been produced, the stamping operations described above on the planar annular part 2 are reconstituted on the bottom 54 of this housing 52. Component 1 of FIG. 14 is then obtained, which has the characteristic that the neck 60 is as a whole projecting towards the outside of the container, although its useful part is oriented towards the inside of the container. The example described here is that of two circular and concentric walls 61 and 62, the outer wall 61 of which comes from the side wall 53 of the housing 52, which can be given as well as to the wall 62, by thermoforming, very varied and not necessarily circular, such as a frustoconical, tronpyramidal, hemispherical, cubic shape, etc. Likewise, the geometric center of the interior wall 62 may not coincide with that of the exterior wall 61, that is to say that the walls 61 and
62 peuvent ne pas être concentriques mais décalées, la paroi extérieure pouvant être dissymétrique pour des raisons esthétiques ou pratiques (pour former un bec verseur par exemple) .62 may not be concentric but offset, the outer wall may be asymmetrical for aesthetic or practical reasons (to form a pouring spout for example).
Les figures 15 et 16, équivalentes aux figures 7 et 8 du mode de réalisation précédent à simple paroi, montrent les différents éléments dissociés (cf. figure 15) et associés (cf. figure 16) d'un contenant avec un composant 1 utilisant un col à double paroi, les mêmes références se rapportant aux mêmes éléments montrés .Figures 15 and 16, equivalent to Figures 7 and 8 of the previous single-walled embodiment, show the different dissociated (see Figure 15) and associated elements (see Figure 16) of a container with a component 1 using a double wall collar, the same references referring to the same elements shown.
Sur la figure 17, on a représenté l'exemple d'un obturateur formé non plus par un bouchon standard 26 mais par une capsule 65 de type connu, en matière synthétique relativement élastique moulée ou thermoformée, et composée d'un embout central creux 66, entouré d'une collerette 67. La capsule 65 peut être simple, c'est-à-dire avoir un embout central à paroi extérieure lisse, analogue à la partie active élastique 27 du bouchon 26. Elle peut aussi comme cela est représenté, posséder un rebord extérieur 68 constitué par la périphérie d'une jupe 69 assez flexible pour pouvoir se déformer élastiquement quand la paroi intérieure 62 est choisie très rigide, comme cela a déjà été décrit en regard de la figure 10. Ainsi le bouchage initial du contenant ainsi que ses rebouchages successifs au moyen de cette capsule 65 sont-ils énergiques, ce qui permet d'utiliser une telle capsule simple et bon marché, même lorsque le produit emballé crée une pression à l'intérieur du contenant 20 car, ici, on ajoute les deux avantages non distincts :FIG. 17 shows the example of a shutter no longer formed by a standard plug 26 but by a capsule 65 of known type, made of relatively elastic molded or thermoformed synthetic material, and composed of a hollow central tip 66 , surrounded by a collar 67. The capsule 65 can be simple, that is to say have a central end piece with a smooth outer wall, similar to the elastic active part 27 of the plug 26. It can also, as shown, have an outer rim 68 formed by the periphery of a skirt 69 flexible enough to be able to deform elastically when the inner wall 62 is chosen to be very rigid, as has already been described with reference to FIG. 10. Thus the initial closure of the container as well as its successive fillings by means of this capsule 65 are they energetic, which makes it possible to use such a simple and inexpensive capsule, even when the packaged product creates pressure inside container 20 because, here, we add the two non-distinct advantages:
- forte pression de contact de la paroi intérieure 62 sur l'embout 66 due à la pression qui règne dans l'intervalle 64; - maintien en place de la capsule 65 grâce à la retenue du rebord 68 par le bord libre de la paroi intérieure 62. Comme dans le cas illustré à la figure 11, la figure 18 montre un col à deux parois permettant aussi un bouchage double, avec une capsule 70 en matière synthétique comportant un embout central creux 71 entouré d'une collerette 72 qui se prolonge par une jupe extérieure 73 munie d'un rebord 74.- high contact pressure of the inner wall 62 on the nozzle 66 due to the pressure prevailing in the interval 64; holding the capsule 65 in place by retaining the rim 68 by the free edge of the interior wall 62. As in the case illustrated in FIG. 11, FIG. 18 shows a collar with two walls also allowing a double closure, with a capsule 70 of synthetic material comprising a hollow central end piece 71 surrounded by a collar 72 which is extended by a skirt outer 73 provided with a rim 74.
Sur la figure 19, on a illustré un avantage du col à deux parois, qui vient du fait que grâce à la largeur du rebord 62, il est possible d'y fixer un opercule de garantie 75, éventuellement muni d'une languette d'arrachage 76. A cet effet, on peut créer un méplat annulaire continu sur le rebord 63 afin que l'opercule 75 puisse y être fixé solidement, par exemple par collage ou soudage. L'accès au contenu ne peut pas se faire sans le retrait de l'opercule, et celui-ci est conçu de telle sorte que tout retrait, même partiel, soit définitif (recollage impossible) et facile à percevoir.In FIG. 19, an advantage of the two-walled collar has been illustrated, which comes from the fact that, thanks to the width of the rim 62, it is possible to fix therein a guarantee lid 75, possibly provided with a tongue of tearing 76. To this end, it is possible to create a continuous annular flat on the rim 63 so that the cover 75 can be fixed therein firmly, for example by gluing or welding. Access to the content cannot be done without removing the cover, and it is designed so that any withdrawal, even partial, is final (re-bonding impossible) and easy to perceive.
Lorsque l'on choisit un obturateur en matière synthétique, en particulier mais non exclusivement une capsule 40 ou 65 ou 70, il est possible de laisser l'obturateur indépendant du contenant, comme on l'a décrit et représenté, ou bien de le rendre solidaire du contenant, par une patte venue de moulage lors de la fabrication du contenant, ou venue de thermoformage lors de l'obtention de l'extrémité qui porte le col, ou bien encore obtenue lors du thermoformage simultané du contenant, du fond, de l'extrémité qui porte le col, et de l'obturateur lui-même. Le col de l'invention est utilisable également pour les contenants comportant un corps, un fond et une extrémité formés en une seule pièce, tel qu'illustré en position ouverte sur le dessin de la figure 20a et en position fermée, après soudure des rebords périphériques, sur le dessin de la figure 20b. Contrairement aux modes de réalisation des figures précédentes, le col 3 est ici créé non sur une ébauche indépendante mais sur un composant faisant partie intégrante du contenant lui-même, qu'elle qu'en soit la forme.When choosing a plastic shutter, in particular but not exclusively a 40 or 65 or 70 capsule, it is possible to leave the shutter independent of the container, as described and shown, or to make it integral with the container, by a tab coming from molding during the manufacture of the container, or coming from thermoforming when obtaining the end which carries the neck, or even obtained during the simultaneous thermoforming of the container, the bottom, the end that carries the neck, and the shutter itself. The neck of the invention can also be used for containers comprising a body, a bottom and an end formed in one piece, as illustrated in the open position in the drawing of FIG. 20a and in the closed position, after welding of the flanges peripherals, in the drawing in Figure 20b. Unlike the embodiments of the previous figures, the neck 3 is here created not on an independent blank but on a component forming an integral part of the container itself, whatever its shape.
La figure 20c illustre un autre mode de réalisation d'un col selon l'invention formé dans un composant associé à un contenant se présentant en une seule pièce sous la forme d'un corps en tronc de cône inversé.FIG. 20c illustrates another embodiment of a neck according to the invention formed in a component associated with a container which is in one piece in the form of a trunk body of inverted cone.
La figure 20d illustre un autre mode de réalisation de l'invention selon lequel le corps et le composant portant le col 3 sont assujettis l'un à l'autre non plus par soudure ou collage définitif comme dans le cas illustré à la figure 20c mais par des organes permettant de dissocier le composant du corps de contenant.FIG. 20d illustrates another embodiment of the invention according to which the body and the component carrying the neck 3 are no longer subject to one another by welding or definitive bonding as in the case illustrated in FIG. 20c but by organs making it possible to dissociate the component from the body of the container.
Le col de l'invention est également applicable à des contenants non rigides non représentés, tels que ceux qui sont formés par une poche en matière synthétique souple ou en complexe d'aluminium, auquel cas un composant muni d'un col peut être fixé directement à ladite poche, le tout étant éventuellement suremballé par un carton.The neck of the invention is also applicable to non-rigid containers, not shown, such as those which are formed by a pocket made of flexible synthetic material or aluminum complex, in which case a component provided with a neck can be attached directly. to said pocket, the whole possibly being overwrapped by a carton.
En résumé, le col de l'invention s'applique :In summary, the neck of the invention applies:
- aux contenants préexistants ayant un fond tenant, c'est-à- dire aux corps creux ayant une ouverture,- pre-existing containers having a holding bottom, that is to say hollow bodies having an opening,
- aux contenants préexistants ayant un fond rapporté,- pre-existing containers with an added bottom,
- aux contenants rigides,- rigid containers,
- aux contenants souples,- flexible containers,
- aux contenants formés en une seule pièce. Afin de pouvoir réaliser des composants 1 distincts du corps du contenant et une mise en oeuvre technico-économique de leur procédé de fabrication notamment au niveau de la fabrication du col, la demanderesse a imaginé également un nouveau concept de contenant du type de celui comportant un corps tubulaire s 'étendant le long d'un axe longitudinal et fermé à au moins une de ses extrémités par au moins un composant de fermeture. Par "corps tubulaire", il faut entendre un volume dont la paroi latérale présente une direction longitudinale préférentielle (appelée axe longitudinal dans le contexte de l'invention), la section du tube prise perpendiculairement à la direction longitudinale pouvant être constante (dans le cas du cylindre par exemple) ou variable (dans le cas du cône, de la pyramide par exemple) et dont une extrémité au moins présente une ouverture. Le corps tubulaire 20 du contenant peut donc avoir toute section voulue : circulaire, polygonale et en particulier quadrangulaire, etc . Ainsi, dans le cas de contenants tubulaires à section carrée ou rectangulaire, il est avantageux de leur donner des angles arrondis avec lesquels les pièces rapportées correspondantes pourront coopérer sans espaces de fuite du contenu. L'invention sera mieux comprise à la lecture de la description ci-après faite en référence aux dessins annexés de divers modes de réalisation d'un contenant conformes à l'invention et donnés à titre d'exemples indicatifs et non limitatifs.- containers formed in one piece. In order to be able to produce components 1 distinct from the body of the container and a technical and economic implementation of their manufacturing process, in particular at the level of the manufacture of the neck, the Applicant has also imagined a new concept of container of the type comprising that of a tubular body extending along a longitudinal axis and closed at at least one of its ends by at least one closure component. By "tubular body" is meant a volume whose side wall has a preferred longitudinal direction (called longitudinal axis in the context of the invention), the section of the tube taken perpendicular to the longitudinal direction can be constant (in the case of the cylinder for example) or variable (in the case of the cone, of the pyramid for example) and of which at least one end has an opening. The tubular body 20 of the container can therefore have any desired section: circular, polygonal and in particular quadrangular, etc. Thus, in the case of tubular containers with square or rectangular section, it is advantageous to give them rounded angles with which the corresponding added parts can cooperate without spaces for content leakage. The invention will be better understood on reading the description below made with reference to the accompanying drawings of various embodiments of a container in accordance with the invention and given by way of indicative and non-limiting examples.
Les figures 21a, 21b, 21c et 21d sont des vues schématiques partielles montrant un corps cylindrique de contenant avec quatre variantes de fixation d'un composant de fermeture d'extrémité haute intégrant un col.Figures 21a, 21b, 21c and 21d are partial schematic views showing a cylindrical container body with four variants for fixing a high end closure component incorporating a neck.
Les figures 21e, 21f, 21g et 21h sont des vues schématiques partielles montrant un corps cylindrique de contenant avec quatre variantes de fixation d'un composant de fond.Figures 21e, 21f, 21g and 21h are partial schematic views showing a cylindrical container body with four variants for fixing a bottom component.
La figure 22 est une vue en coupe verticale d'un composant de fermeture selon l'invention.Figure 22 is a vertical sectional view of a closure component according to the invention.
Les figures 23a, 23b et 23c sont des vues schématiques en coupe verticale illustrant le dispositif d'assemblage de l'invention selon différentes phases d'assemblage du composant de fermeture de la figure 22 à un corps de contenant. Tel qu'illustré sur les dessins des figures 21a, b, c, d, e, f, g et h, ce contenant tubulaire 20 se distingue en ce que le susdit composant de fermeture 1 (représenté ici intégrant un col à double paroi 60), obtenu par thermoformage, comprend une partie centrale de fermeture 2 sensiblement perpendiculaire à l'axe longitudinal du corps tubulaire 20 pour assurer l'obturation de ce dernier, et des organes de liaison du composant 1 au corps 20 constitué d'un bord périphérique continu 5 sensiblement parallèle à l'extrémité du corps tubulaire 20 de façon à coopérer avec ladite extrémité, ledit bord périphérique 5 étant rendu solidaire à l'extrémité du corps 20 dans leur zone de contact.Figures 23a, 23b and 23c are schematic views in vertical section illustrating the assembly device of the invention according to different phases of assembly of the closure component of Figure 22 to a container body. As illustrated in the drawings of Figures 21a, b, c, d, e, f, g and h, this tubular container 20 is distinguished in that the above closure component 1 (shown here incorporating a double-walled neck 60 ), obtained by thermoforming, comprises a central closing part 2 substantially perpendicular to the longitudinal axis of the tubular body 20 to ensure the obturation of the latter, and connecting members of the component 1 to the body 20 consisting of a peripheral edge continuous 5 substantially parallel to the end of the tubular body 20 so as to cooperate with said end, said peripheral edge 5 being made integral with the end of body 20 in their contact zone.
Selon l'invention, le corps tubulaire 20 du contenant, formé de préférence par courbure sur elle-même d'une feuille originellement plane, présente une face interne en matériau synthétique, en carton ou en matériau similaire dont la susdite zone de contact de son extrémité au moins avec le bord périphérique 5 du composant 1 est avantageusement revêtue ou constituée d'un matériau soudable ou collable afin de réaliser dans la zone de contact une liaison par soudure ou par collage.According to the invention, the tubular body 20 of the container, preferably formed by curvature on itself of an originally flat sheet, has an internal face of synthetic material, cardboard or similar material, the aforesaid contact zone of its at least one end with the peripheral edge 5 of the component 1 is advantageously coated or made up of a weldable or bondable material in order to make a connection in the contact zone by welding or by bonding.
Le procédé d'assemblage du composant 1 au corps tubulaire d'un contenant 20 est également nouveau dans son principe et consiste alors simplement:The method of assembling component 1 to the tubular body of a container 20 is also new in principle and therefore consists simply:
- dans un premier temps, à insérer le composant 1 dans le corps tubulaire 20 de manière à mettre en vis-à-vis les zones de contact de l'extrémité du corps 20 du contenant et du bord périphérique 5, - et dans un deuxième temps, à réaliser sur une certaine hauteur de l'extrémité dudit corps tubulaire 20, une liaison périphérique continue entre ladite extrémité et le bord périphérique 5 du composant 1.- firstly, insert the component 1 into the tubular body 20 so as to face the contact areas of the end of the body 20 of the container and the peripheral edge 5, - and in a second time, to achieve over a certain height of the end of said tubular body 20, a continuous peripheral connection between said end and the peripheral edge 5 of component 1.
Pour une meilleure compréhension de l'invention, les dessins des figures 21 a, b, c, d, e, f, g et h illustrent ce nouveau concept de contenant 20 représenté ici sous une forme cylindrique à section circulaire possédant deux ouvertures diamétralement opposées fermées à son extrémité haute par un composant 1 avec un col de remplissage à double paroi 60 (cf. figures 21a, 21b, 21c, 21d) et à son extrémité basse par un composant de fond 3 (cf. figures 21e, f , g et h) .For a better understanding of the invention, the drawings of FIGS. 21 a, b, c, d, e, f, g and h illustrate this new concept of container 20 represented here in a cylindrical shape with circular section having two diametrically opposite openings. closed at its upper end by a component 1 with a double-walled filling neck 60 (cf. FIGS. 21a, 21b, 21c, 21d) and at its lower end by a bottom component 3 (cf. FIGS. 21e, f, g and h).
Le contenant 20 auquel le composant 1 doit être fixé par son bord périphérique 5 peut être de différents types, dès lors que le composant 1 peut être engagé à l'intérieur du corps 20 du contenant, selon deux variantes possibles : sur la figure 21a, le composant 1 est orienté pour constituer une sorte de cuvette dont le bord 5 doit être fixé à l'intérieur du corps 20, la partie plane 2 étant située à l'intérieur du contour du corps 20, - sur la figure 21b, la partie de fermeture 2 du composant 1 est située au niveau du bord du corps 20, le bord 5 devant être fixé à l'intérieur du corps 20.The container 20 to which the component 1 must be fixed by its peripheral edge 5 can be of different types, since the component 1 can be engaged inside the body 20 of the container, according to two possible variants: in FIG. 21a, the component 1 is oriented to constitute a sort of bowl whose edge 5 must be fixed inside the body 20, the flat part 2 being located inside the contour of the body 20, - in FIG. 21b, the part closure 2 of component 1 is located at the edge of the body 20, the edge 5 having to be fixed inside the body 20.
Pour effectuer une liaison périphérique continue par soudure, il faut d'une part un outil qui peut être de tout type connu tel qu'une électrode, une mollette chauffante, etc., et d'autre part une contrepartie assurant l'appui de la partie à souder. Pour - 1 - effectuer la soudure du bord 5 et du corps 20 selon la disposition de la figure 21a, il est facile de prévoir un outil et une contrepartie venant se placer, extérieurement au contenant, comme une pince ayant une branche extérieure contre le corps 20 et une branche intérieure contre le bord 5.To make a continuous peripheral connection by welding, on the one hand, a tool which can be of any known type such as an electrode, a heating wheel, etc., and on the other hand a counterpart ensuring the support of the part to be welded. For - 1 - weld the edge 5 and the body 20 according to the arrangement of Figure 21a, it is easy to provide a tool and a counterpart coming to be placed, externally to the container, like a clamp having an outer branch against the body 20 and an inner branch against the edge 5.
Pour effectuer la soudure du bord 5 et du corps 20 selon la disposition de la figure 21b, le dispositif de soudure doit comprendre une partie située à l'intérieur du corps 20, ce qui suppose que le corps 20 soit ouvert, c'est-à-dire sans composant de fond 23 qui doit donc être rapporté et soudé après fixation du composant 1. En conséquence, avec la disposition de la figure 21b, le fond 23 doit pouvoir être fixé depuis l'extérieur du contenant, comme montré sur les dessins des figures 21e et f, et correspondant au composant 1 de la figure 21a. Le positionnement du contour de l'ébauche, et donc sa concentricité par rapport au corps 20, dépendent de l'action de l'outil de découpe de l'ébauche et l'emplacement de cet outil n'est pas rigoureusement établi par rapport au centre de l'ébauche. En conséquence, le positionnement du composant 1 peut être quelque peu imprécis.To perform the welding of the edge 5 and of the body 20 according to the arrangement in FIG. 21b, the welding device must include a part located inside the body 20, which supposes that the body 20 is open, that is to say i.e. without bottom component 23 which must therefore be attached and welded after attachment of component 1. Consequently, with the arrangement in FIG. 21b, the bottom 23 must be able to be fixed from outside the container, as shown on the drawings of Figures 21e and f, and corresponding to component 1 of Figure 21a. The positioning of the outline of the blank, and therefore its concentricity with respect to the body 20, depends on the action of the tool for cutting the blank and the location of this tool is not rigorously established with respect to the center of the draft. As a result, the positioning of component 1 may be somewhat inaccurate.
Aussi, la demanderesse propose-t-elle deux autres solutions.The applicant therefore proposes two other solutions.
Sur la figure 21c, le composant 1 peut également avoir une étendue supérieure à la section du corps 20, afin qu'un bord 5a se place à l'extérieur du corps 20 où il est fixé. Cette situation est analogue à celle de la figure 21b, c'est-à-dire qu'une partie du dispositif de soudure doit être introduite dans le corps 20.In FIG. 21c, the component 1 can also have an extension greater than the section of the body 20, so that an edge 5a is placed outside the body 20 where it is fixed. This situation is analogous to that of FIG. 21b, that is to say that part of the welding device must be introduced into the body 20.
Selon le mode de réalisation préférentielle de l'invention représenté à la figure 21d, on résout ce problème facilement car le bord périphérique 5 dudit composant 1 présente deux parois parallèles 5b et 5ç en une seule pièce réunies par un repli 5d de leur matière constitutive et séparées par un espace ouvert formant une rainure continue adoptant en section la forme générale d'un U avec ses deux branches 5b et 5ç_ et sa base 5d. La largeur de cette rainure en U est sensiblement égale à l'épaisseur de l'extrémité de la paroi du corps tubulaire 20 afin que l'extrémité dudit corps puisse s'insérer intégralement dans ladite rainure. Le positionnement de l'espace annulaire que forme la rainure en U est, lui, bien précis, de sorte que le composant 1 vient se positionner sur le corps 20 de manière parfaitement centrée. Le bord extérieur 5ç_, dont le contour est imprécis, peut présenter sans inconvénient une hauteur variable tout autour du corps 20 après fixation, les deux bords 5b et 5c. n'ayant pas nécessairement la même hauteur. Le bord extérieur 5ç_ peut donc être assez petit, à la manière d'un bord de sertissage peu apparent. Ici, le composant 1 est fixé au corps 20 par les deux bords 5b et 5c, c'est-à-dire intérieurement et extérieurement, ce qui garantit une excellente étanchéité, notamment grâce au recouvrement de l'arête du corps 20 par le rebord 5d en appui sur elle. Cette structure, du point de vue de la soudure du composant 1 sur le corps 20, est analogue à celle de la figure 21a, à savoir que cette soudure peut être réalisée à partir de l'extérieur du contenant. Ce mode préférentiel de réalisation sera décrit plus en détails un peu plus loin dans la description.According to the preferred embodiment of the invention shown in FIG. 21d, this problem is easily solved because the peripheral edge 5 of said component 1 has two parallel walls 5b and 5c in one piece joined by a fold 5d of their constituent material and separated by an open space forming a continuous groove adopting in section the general shape of a U with its two branches 5b and 5ç_ and its base 5d. The width of this U-shaped groove is substantially equal to the thickness of the end of the wall of the tubular body 20 so that the end of said body can be fully inserted into said groove. The positioning of the annular space formed by the U-shaped groove is itself very precise, so that the component 1 is positioned on the body 20 in a perfectly centered manner. The outer edge 5ç_, the outline of which is imprecise, can have, without drawback, a variable height all around the body 20 after fixing, the two edges 5b and 5c. not necessarily having the same height. The outer edge 5ç_ can therefore be quite small, in the manner of an invisible crimping edge. Here, the component 1 is fixed to the body 20 by the two edges 5b and 5c, that is to say internally and externally, which guarantees an excellent seal, in particular thanks to the covering of the edge of the body 20 by the flange 5d resting on it. This structure, from the point of view of the welding of the component 1 on the body 20, is similar to that of FIG. 21a, namely that this welding can be carried out from the outside of the container. This preferred embodiment will be described in more detail a little later in the description.
Le fond 23 peut avoir différentes formes indépendantes de celles du composant 1, sauf en ce qui concerne sa fixation au corps 20 qui exige une coordination avec le composant 1, les organes de fixation au corps 20 devant être accordés. Ainsi :The bottom 23 can have different forms independent of those of the component 1, except as regards its attachment to the body 20 which requires coordination with the component 1, the bodies for attachment to the body 20 having to be tuned. So :
- sur le dessin de la figure 21e, le fond 23 possède un bord 23a similaire au bord 5 de l'extrémité 1 et est mis en place dans le corps 20 de manière identique au composant 1 de la figure 21a,- in the drawing in FIG. 21e, the bottom 23 has an edge 23a similar to the edge 5 of the end 1 and is placed in the body 20 in an identical manner to the component 1 in FIG. 21a,
- sur le dessin de la figure 21f, le fond 23 a deux bords parallèles 23b et 23ç_ (réunis à leur partie supérieure par un rebord 23d et séparés par une rainure en U) et est mis en place dans le corps 20 de manière identique au composant 1 de la figure 21d,- In the drawing of FIG. 21f, the bottom 23 has two parallel edges 23b and 23ç_ (joined at their upper part by a rim 23d and separated by a U-shaped groove) and is placed in the body 20 in an identical manner to the component 1 of FIG. 21d,
- sur les dessins des figures 21g et 21 h, les fonds 23 sont mis en place dans le corps 20 de manière identique aux composants 1 des figures 21b et 21 c respectivement.- In the drawings of Figures 21g and 21h, the funds 23 are placed in the body 20 identically to the components 1 of Figures 21b and 21c respectively.
Le thermoformage du composant 1 portant un col ou du composant de fond 23 permet de donner à ces composants des formes très variées selon les applications de l'invention : substantiellement plane (figures 1 à 2 lf ) , tronpyramidale , tronconique (figures 21g et 21h) , etc. Ainsi, les parties centrales de fermeture 24 des fonds 23 des contenants 20 ont été représentées sur les dessins des figures 21g et 21h avec une préforme concave apte à venir épouser la préforme convexe que forme le col avec éventuellement son système de bouchage d'un composant 1 d'un contenant disposé au-dessous, pour autoriser le gerbage des deux contenants.The thermoforming of the component 1 carrying a neck or of the bottom component 23 makes it possible to give these components very varied forms according to the applications of the invention: substantially planar (Figures 1 to 2 lf), tronpyramidal, frustoconical (Figures 21g and 21h ), etc. Thus, the central closing parts 24 of the bottoms 23 of the containers 20 have been shown in the drawings of FIGS. 21g and 21h with a concave preform capable of coming to conform to the convex preform that the neck forms with possibly its system for plugging a component. 1 of a container arranged below, to allow stacking of the two containers.
Le dessin de la figure 22 illustre plus en détails un profil particulier d'un composant de fermeture tel que le composant 1 représenté en coupe selon un plan vertical sur le dessin de la figure 21d, étant entendu que le même profil peut être adapté au composant de fond 23 représenté sur le dessin de la figure 21f.The drawing of Figure 22 illustrates in more detail a particular profile of a closure component such as component 1 shown in section along a vertical plane in the drawing of Figure 21d, it being understood that the same profile can be adapted to the component 23 shown in the drawing of Figure 21f.
Au stade de la fabrication, cette disposition est choisie préférentiellement par la demanderesse car l'extrémité du composant 1 est fixée au corps 20 par les deux branches 5b et 5ç_ de la rainure en forme de U, c'est-à-dire intérieurement et extérieurement, ce qui garantit une excellente étanchéité, notamment grâce au recouvrement de l'arête du corps 20 par le rebord 5d en appui sur elle. En outre, cette structure permet de réaliser une soudure à partir de l'extérieur du contenant 20. Le profil original du bord périphérique 5 du composant 1 illustré à la figure 22 a pour objet de parachever la qualité d'assemblage du composant 1 au corps du contenant 20, tout en préservant l'étancheité et l'esthétique d'ensemble de ce dernier.At the manufacturing stage, this arrangement is preferably chosen by the applicant because the end of the component 1 is fixed to the body 20 by the two arms 5b and 5ç_ of the U-shaped groove, that is to say internally and externally, which guarantees an excellent seal, in particular thanks to the covering of the edge of the body 20 by the rim 5d bearing on it. In addition, this structure makes it possible to weld from the outside of the container 20. The original profile of the peripheral edge 5 of the component 1 illustrated in FIG. 22 is intended to complete the quality of assembly of the component 1 to the body of container 20, while preserving the seal and overall aesthetics of the latter.
Selon une première caractéristique de ce profil, la branche externe 5ç de la rainure périphérique en forme de U est plus courte que la branche interne 5b et est prolongée d'une jupe périphérique 5ç' . L'angle d'ouverture α (de l'ordre de 30°) que cette jupe forme avec le plan de symétrie du composant 1 a été judicieusement choisi suffisamment grand pour faciliter le guidage de l'extrémité du corps 20 dans le U de la rainure du bord 5 et suffisamment petit pour permettre son rabat par thermoformage contre la paroi externe de l'extrémité du corps 20 introduit dans la rainure en U. De même, la longueur "1" (de l'ordre de 3,5 mm) a été judicieusement choisie suffisamment longue pour faire office de bras de levier permettant son rabac lors de l'opération d'assemblage par thermoformage contre la paroi externe de l'extrémité du corps 20 introduite dans ladite rainure, et suffisamment courte pour éviter un étire ent irrégulier de la matière se traduisant par la formation de "vagues" inesthétiques lors de l'opération d'assemblage par thermoformage.According to a first characteristic of this profile, the external branch 5c of the U-shaped peripheral groove is shorter than the internal branch 5b and is extended by a peripheral skirt 5c '. The opening angle α (of the order of 30 °) that this skirt forms with the plane of symmetry of the component 1 has been judiciously chosen large enough to facilitate guiding the end of the body 20 in the U of the edge groove 5 and small enough to allow its flap by thermoforming against the outer wall of the end of the body 20 introduced into the U-shaped groove. Similarly, the length "1" (of the order of 3.5 mm) has been judiciously chosen long enough to act as a lever arm allowing it to be folded during the assembly operation by thermoforming against the external wall of the end of the body 20 introduced into said groove, and short enough to avoid an irregular stretch of the material resulting in the formation of unsightly "waves" during the assembly operation by thermoforming.
Selon une deuxième caractéristique de ce profil combinée à la première, la branche interne 5b de la rainure périphérique en forme de U offre en coupe horizontale une surface de sa paroi externe (qui est le diamètre extérieur lorsque le corps tubulaire adopte la forme d'un cylindre droit) légèrement supérieure à la surface de la paroi intérieure de l'extrémité du corps 20 pour assurer un étroit contact entre les deux dites parois. Cette même branche 5b présente une hauteur (de l'ordre de 5 à 10 mm) qui soit suffisante pour assurer une bonne tenue mécanique et une surface active d'adhésion suffisante entre les deux dites parois pour assurer leur assemblage par thermosoudage. En effet, la soudure par thermoscellage du composant 1 sur l'extrémité du corps de contenant 20 introduite dans la rainure en forme de U du bord périphérique 5, s'effectue au niveau de ces deux dites parois en contact dont l'une au moins est à cet effet, revêtue ou constituée dans la zone de soudure, partiellement ou en totalité, d'un matériau soudable ou collable.According to a second characteristic of this profile combined with the first, the internal branch 5b of the U-shaped peripheral groove offers in horizontal section a surface of its external wall (which is the external diameter when the tubular body takes the form of a right cylinder) slightly greater than the surface of the inner wall of the end of the body 20 to ensure close contact between the two said walls. This same branch 5b has a height (of the order of 5 to 10 mm) which is sufficient to ensure good mechanical strength and an active surface of sufficient adhesion between the two said walls to ensure their assembly by heat sealing. Indeed, the heat sealing of the component 1 on the end of the container body 20 introduced into the U-shaped groove of the peripheral edge 5, takes place at the level of these two said walls in contact, one of which at least is for this purpose, coated or formed in the weld zone, partially or entirely, of a weldable or bondable material.
Selon une troisième caractéristique de ce profil combinée aux deux premières, la portion assurant la liaison de l'extrémité libre de la branche interne 5b de ladite rainure périphérique en forme de U à la partie de fermeture 2 (représentée plane dans cet exemple) du composant 1 adopte une pente (et plus particulièrement une courbe) suffisante pour faciliter le guidage de l'extrémité du corps 20 dans ladite rainure du U. Ainsi, tant cette portion courbe de liaison entre la branche interne 5b. et la partie annulaire 2 que la jupe périphérique 5ç' du prolongement de la branche externe 5ç_, définissent un entonnoir guidant la pénétration de l'extrémité du corps de contenant 20 dans la rainure en forme de U du bord périphérique 5, notamment quand cette opération est entièrement automatisée. L'opération de la soudure par thermoscellage de l'extrémité du corps de contenant 20 dans la rainure en U du bord 5 afin d'assurer l'assemblage étanche du composant 1 au corps 20, avec l'une au moins des parois en contact revêtue ou constituée dans la zone de soudure, partiellement ou en totalité, d'un matériau soudable ou collable, est délicate car elle doit être exécutée : - avec une pression homogène sur tout le pourtour du bord périphérique 5 et de l'extrémité du corps 20, quel que soit leur profil (circulaire, polygonal) vu en coupe horizontale,According to a third characteristic of this profile combined with the first two, the portion ensuring the connection of the free end of the internal branch 5b of said peripheral U-shaped groove to the closure part 2 (shown plane in this example) of the component 1 adopts a slope (and more particularly a curve) sufficient to facilitate the guiding of the end of the body 20 in said groove of the U. Thus, both this curved portion of connection between the internal branch 5b. and the annular part 2 that the peripheral skirt 5 'of the extension of the external branch 5', define a funnel guiding the penetration of the end of the container body 20 into the U-shaped groove of the peripheral edge 5, in particular when this operation is fully automated. The operation of heat sealing the end of the container body 20 in the U-shaped groove of the edge 5 so ensuring the tight assembly of the component 1 to the body 20, with at least one of the walls in contact coated or formed in the weld zone, partially or entirely, of a weldable or bondable material, is delicate because it must be carried out: - with a uniform pressure over the entire periphery of the peripheral edge 5 and the end of the body 20, whatever their profile (circular, polygonal) seen in horizontal section,
- quelles que soient les rigidités des matériaux constitutifs du corps 20 et du composant 1, - et selon une température de sertissage et/ou de scellage adéquate.- whatever the rigidities of the constituent materials of the body 20 and of the component 1, - and according to an adequate crimping and / or sealing temperature.
Les dessins des figures 23a, 23b et 23c illustrent schématiquement un dispositif d'assemblage original que propose la demanderesse pour parvenir à assurer cette opération de thermoscellage.The drawings of FIGS. 23a, 23b and 23c schematically illustrate an original assembly device which the applicant proposes to achieve this heat-sealing operation.
Tel que représenté sur le dessin de la figure 23a, ce dispositif est constitué par un outillage de thermoscellage référencé 0 dans son ensemble, comportant au moins une matrice M formée par un manchon chauffant qui, animé d'un mouvement de va et vient le long de l'axe longitudinal du corps de contenant 20, présente en coupe horizontale une surface intérieure (diamètre si le corps 20 est un cylindre) légèrement supérieure à celle de la paroi externe de la branche externe 5ç_ du bord périphérique 5 du composant 1 de manière à venir en contact lors de son mouvement de descente (flèche Dm) contre la jupe périphérique 5ç_' qu'elle rabat et qu'elle plaque par thermodéformation contre la paroi externe de l'extrémité du corps 20, dans l'axe de prolongement de la branche externe 5ç_.As shown in the drawing in FIG. 23a, this device is constituted by a heat-sealing tool referenced 0 as a whole, comprising at least one matrix M formed by a heating sleeve which, animated by a movement back and forth along of the longitudinal axis of the container body 20, has in horizontal section an inner surface (diameter if the body 20 is a cylinder) slightly greater than that of the outer wall of the outer branch 5ç_ of the peripheral edge 5 of the component 1 so to come into contact during its downward movement (arrow D m ) against the peripheral skirt 5ç_ 'which it folds down and which it thermally deforms against the external wall of the end of the body 20, in the extension axis of the external branch 5ç_.
Selon un mode de réalisation préférée de l'invention, le bord d'attaque M' du susdit manchon chauffant formant la matrice M est évasé selon un angle d'ouverture α'(de l'ordre de 15 à 30°) par rapport à l'axe longitudinal du corps de contenant 20, qui soit de préférence légèrement inférieur à celui de l'angle d'ouverture de la susdite jupe périphérique 5ç' pour que l'opération de rabat et e placage par thermodéformation contre la paroi externe de l'extrémité du corps 20 s'effectue progressivement au mouvement de descente (flèche Dm) du manchon M. La figure 23b montre la matriceAccording to a preferred embodiment of the invention, the leading edge M 'of the above heating sleeve forming the matrix M is flared at an opening angle α' (of the order of 15 to 30 °) relative to the longitudinal axis of the container body 20, which is preferably slightly less than that of the opening angle of the aforesaid peripheral skirt 5c 'so that the operation of flap and plating by heat deformation against the external wall of the the end of the body 20 takes place gradually at the movement of lowering (arrow D m ) of the sleeve M. Figure 23b shows the matrix
M en fin de course de son mouvement de descente en position emmanchée dans la partie haute du manchon autour de la branche 5ç_ du bord 5 avec la jupe 5ç_' maintenue dans le prolongement de la branche 5c_.M at the end of its downward movement in the fitted position in the upper part of the sleeve around the branch 5ç_ of the edge 5 with the skirt 5ç_ 'held in the extension of the branch 5c_.
Le susdit outillage de thermoscellage 0 comporte un poinçon chauffant P qui, également animé d'un mouvement de va et vient le long de l'axe longitudinal du corps de contenant 20, adopte extérieurement une forme tronconique dont la base inférieure a une surface (diamètre si le corps 20 est un cylindre) plus petite que celle de la paroi interne de la branche interne 5b du U du bord périphérique 5 du composant 1 et dont la base supérieure a une surface (diamètre si le corps 20 est un cylindre) plus grande que celle de ladite paroi interne de la branche interne 5b_ de telle sorte que la paroi externe oblique P' du poinçon P exerce une pression sur l'extrémité haute de la paroi interne de la branche interne 5b du bord périphérique 5 du composant 1 proportionnelle au mouvement de descente (flèche Dp) dudit poinçon, jusqu'à un point bas limite où l'extrémité du corps de contenant 20 enserrée à l'intérieur de la rainure en forme de U du bord périphérique 5, soit comprimée au maximum entre la matrice M et le poinçon P.The above heat-sealing tool 0 comprises a heating punch P which, also driven in a movement back and forth along the longitudinal axis of the container body 20, externally adopts a frustoconical shape whose lower base has a surface (diameter if the body 20 is a cylinder) smaller than that of the internal wall of the internal branch 5b of the U of the peripheral edge 5 of the component 1 and whose upper base has a larger surface (diameter if the body 20 is a cylinder) than that of said internal wall of the internal branch 5b_ such that the oblique external wall P 'of the punch P exerts pressure on the upper end of the internal wall of the internal branch 5b of the peripheral edge 5 of the component 1 proportional to the downward movement (arrow Dp) of said punch, to a low limit point where the end of the container body 20 clamped inside the U-shaped groove of the peripheral edge 5, is compr mapped at most between the matrix M and the punch P.
Selon une caractéristique préférentielle de l'invention, la température de chauffage du poinçon chauffant P destinée à assurer un thermoscellage intérieur est plus importante que celle de la matrice M destinée à assurer un thermoformage extérieur de la jupe extérieure 5ç_' , voire un thermosertissage.According to a preferred characteristic of the invention, the heating temperature of the heating punch P intended to ensure an internal heat-sealing is higher than that of the matrix M intended to ensure an external thermoforming of the external skirt 5c_ ', or even a thermosetting.
Selon un mode de réalisation préférée de l'ensemble de l'outillage de thermoscellage, le poinçon chauffant P amorce sa descente (flèche Dp) lorsque le mouvement de descente (flèche Dm) de la matrice M est terminé, permettant ainsi de concevoir un outillage de thermoscellage 0 automatique où la matrice M et le poinçon P disposés superposés se déplacent le long d'une même colonne avec des butées d'arrêt de fin de course faciles à mettre en oeuvre pour assurer un enchaînement successif automatique des deux opérations de thermoformage ou chermosertissage pour la matrice M et de thermoscellage pour le poinçon P. La mise en oeuvre d'un contenant conforme à l'invention :According to a preferred embodiment of the set of heat-sealing tools, the heating punch P begins its descent (arrow Dp) when the descent movement (arrow D m ) of the matrix M is completed, thus making it possible to design a automatic thermosealing tool 0 where the matrix M and the punch P arranged superimposed move along the same column with limit stop stops easy to implement to ensure an automatic successive sequence of the two thermoforming operations or seaming for the matrix M and heat sealing for the punch P. The use of a container in accordance with the invention:
- ne nécessite que des investissements faibles,- only requires low investment,
- prévoit un outillage spécifique à chaque type de contenant qui est très réduit et de prix raisonnable, - est réalisé avec un coût unitaire peu élevé.- provides specific tools for each type of container which is very small and reasonably priced, - is produced with a low unit cost.
Le contenant de l'invention peut se présenter sous des formes extrêmement variées et présenter de multiples applications tels queThe container of the invention can be in extremely varied forms and have multiple applications such as
- l'emballage de produits solides, - le conditionnement de produits secs (poudre, granulés, particules finement divisées, etc..)- packaging of solid products, - packaging of dry products (powder, granules, finely divided particles, etc.)
- le conditionnement de produits liquides, humides et gras.- the packaging of liquid, wet and fatty products.
Un tel contenant est donc susceptible de répondre à la quasi totalité de exigences du marché du conditionnement, surtout pour traiter des quantités petites et moyennes ne justifiant pas les investissements lourds nécessaires à la création des contenants sur le lieu du remplissage, en tête de ligne de conditionnement. Such a container is therefore likely to meet almost all of the requirements of the packaging market, especially for processing small and medium quantities that do not justify the heavy investment required to create the containers at the place of filling, at the head of the line. conditioning.

Claims

REVENDICATIONS
1. Procédé de fabrication d'un col de contenant qui, entourant un orifice, est continûment cylindrique et est réalisé par thermoformage d'une feuille en matière synthétique, CARACTERISE EN CE QUE l'on soumet la feuille en matière synthétique à une opération de thermoformage afin d'obtenir une ébauche (6-50) d'un composant (1) du contenant et que l'on ménage dans cette ébauche (6-50), soit lors du thermoformage soit ultérieurement, un trou (8- 55) de diamètre inférieur à celui voulu pour l'orifice, puis qu'après refroidissement de l'ébauche (6-50), on procède à une opération d'emboutissage sur ladite ébauche (6-50), au moyen d'une matrice de maintien (10-56) et d'un poinçon cylindrique (11-59) introduit à force dans le trou (8-55), ce poinçon (11-59) ayant un diamètre extérieur égal au diamètre voulu pour l'orifice, cette opération d'emboutissage se faisant à froid afin de déformer la matière synthétique mécaniquement, c'est-à-dire à une température inférieure à celle du thermoformage, sans aucun amincissement de la feuille d'origine, pour créer le col (3-60) hors du plan initial de l'ébauche (6-50), puis que l'on retire le poinçon (11-57) et qu'on libère la pièce obtenue.1. Method of manufacturing a container neck which, surrounding an orifice, is continuously cylindrical and is carried out by thermoforming of a sheet of synthetic material, CHARACTERIZED IN THAT the sheet of synthetic material is subjected to an operation of thermoforming in order to obtain a blank (6-50) of a component (1) of the container and which is housed in this blank (6-50), either during thermoforming or subsequently, a hole (8- 55) of diameter smaller than that desired for the orifice, then after cooling the blank (6-50), a drawing operation is carried out on said blank (6-50), by means of a matrix of holding (10-56) and a cylindrical punch (11-59) forced into the hole (8-55), this punch (11-59) having an outside diameter equal to the desired diameter for the orifice, this cold drawing operation in order to deform the synthetic material mechanically, that is to say at a temperature re lower than that of thermoforming, without any thinning of the original sheet, to create the neck (3-60) out of the initial plane of the blank (6-50), then that the punch is removed (11 -57) and that the part obtained is released.
2. Procédé selon la revendication 1, CARACTERISE EN CE QUE l'on procède à l'emboutissage directement sur l'ébauche (6) substantiellement plane, afin d'obtenir un col (3) à simple paroi et à bord franc. 2. Method according to claim 1, CHARACTERIZED IN that one proceeds to stamping directly on the blank (6) substantially planar, in order to obtain a neck (3) single wall and with a sharp edge.
3. Procédé selon la revendication 1, CARACTERISE EN CE QUE lors du thermoformage, on crée un logement creux (52) en saillie hors du plan de l'ébauche (50) et présentant une paroi latérale (53) et un fond transversal (54), et que l'on ménage le trou (55) dans le fond transversal (54), puis que l'on procède à l'emboutissage dudit fond transversal (54), de l'extérieur vers l'intérieur du logement (52), afin d'obtenir un col (60) à deux parois (61 et 62), l'une, extérieure (61), étant formée par une partie de la paroi latérale originelle (53) du logement (52)- et l'autre (62) par le fond transversal (54) que l'emboutissage a déformé en paroi (62) intérieure à la précédente (61).3. Method according to claim 1, CHARACTERIZED IN THAT during thermoforming, a hollow housing (52) is protruded out of the plane of the blank (50) and having a side wall (53) and a transverse bottom (54 ), and that the hole (55) is cleaned in the transverse bottom (54), then that one proceeds to stamping said transverse bottom (54), from the outside towards the inside of the housing (52 ), in order to obtain a collar (60) with two walls (61 and 62), one, exterior (61), being formed by a part of the original side wall (53) of the housing (52) - and l 'other (62) by the transverse bottom (54) that the stamping has deformed in the wall (62) inside the previous one (61).
4. Col de contenant obtenu à partir d'une feuille en matière synthétique par le procédé de thermoformage selon les revendications 1 2 et/ou 3, CARACTERISE PAR LE FAIT QUE la susdite feuille ayant un épaisseur nominale donnée (e) , la paroi formant le col (3-60) a sensiblement cette même épaisseur sans amincissement perceptible sur toute sa hauteur utile, c'est-à-dire sur la hauteur de sa face intérieure contre laquelle doit se situer un obturateur (26-40-70) de type quelconque engagé dans le col (3-60) lorsque le contenant est obturé.4. Container neck obtained from a sheet of material synthetic by the thermoforming process according to claims 1 2 and / or 3, CHARACTERIZED BY THE FACT THAT the said sheet having a given nominal thickness (e), the wall forming the neck (3-60) has substantially this same thickness without thinning perceptible over its entire useful height, that is to say on the height of its inner face against which must be a shutter (26-40-70) of any type engaged in the neck (3-60) when the container is closed.
5. Col de contenant selon la revendication 4, CARACTERISE PAR LE FAIT QUE ledit col (3-60) est saillant vers l'extérieur du contenant.5. Container neck according to claim 4, CHARACTERIZED BY THE FACT THAT said neck (3-60) is projecting towards the outside of the container.
6. Col de contenant selon la revendication 4, CARACTERISE PAR LE FAIT QUE ledit col (3-60) est saillant vers l'intérieur du contenant. 6. Container neck according to claim 4, CHARACTERIZED BY THE FACT THAT said neck (3-60) is projecting towards the inside of the container.
7. Col de contenant selon la revendication 4, CARACTERISE PAR LE FAIT QUE le col (3) est à simple paroi.7. Container neck according to claim 4, CHARACTERIZED BY THE FACT THAT the neck (3) is single-walled.
8. Col de contenant selon la revendication 4, CARACTERISE PAR LE FAIT QUE le col (60) présente deux parois (61 et 62), l'une entourant l'autre, réunies par un rebord supérieur (63) et séparées par un espace (64).8. Container neck according to claim 4, CHARACTERIZED BY THE FACT THAT the neck (60) has two walls (61 and 62), one surrounding the other, joined by an upper rim (63) and separated by a space (64).
9. Col de contenant selon la revendication 4, CARACTERISE PAR LE FAIT QUE devant être associé à un obturateur (30-65) destiné à être engagé dans l'orifice (4), le bord libre de la paroi intérieure du col se trouve à une distance (d) coordonnée à celle de l'obturateur (30-60), afin qu'un rebord (35-68) que celui-ci présente à sa base puisse se placer au-delà de ce bord libre et venir en butée contre lui, afin de déterminer une position stable de l'obturateur(30-65) .9. Container neck according to claim 4, CHARACTERIZED BY THE FACT THAT having to be associated with a shutter (30-65) intended to be engaged in the orifice (4), the free edge of the inner wall of the neck is at a distance (d) coordinated with that of the shutter (30-60), so that a flange (35-68) which the latter presents at its base can be placed beyond this free edge and come into abutment against it, to determine a stable position of the shutter (30-65).
10. Col de contenant selon la revendication 4, CARACTERISE PAR LE FAIT QUE ledit col (3) est situé directement sur le corps du contenant (20) .10. Container neck according to claim 4, CHARACTERIZED BY THE FACT THAT said neck (3) is located directly on the body of the container (20).
11. Col de contenant selon la revendication 4, CARACTERISE PAR LE FAIT QUE ledit col (3-60) est situé sur un composant (1) distinct du contenant, rapporté et assujetti audit corps de contenant (20) .11. Container neck according to claim 4, CHARACTERIZED BY THE FACT THAT said neck (3-60) is located on a component (1) distinct from the container, attached and subject to said container body (20).
12. Contenant comportant un corps tubulaire (20) s 'étendant le long d'un axe longitudinal et fermé à au moins une de ses extrémités par au moins un composant de fermeture (1), CARACTERISE PAR LE FAIT QUE le susdit composant de fermeture (1) :12. Container comprising a tubular body (20) extending along a longitudinal axis and closed at at least one of its ends by at least one closing component (1), CHARACTERIZED BY THE FACT THAT the above closing component (1):
- est obtenu par thermoformage d'une feuille en matière synthétique,- is obtained by thermoforming a plastic sheet,
- comprend une partie centrale de fermeture (2) sensiblement perpendiculaire à l'axe longitudinal dudit tube pour assurer l'obturation de ce dernier,- comprises a central closing part (2) substantially perpendicular to the longitudinal axis of said tube in order to close off the latter,
- comprend des organes de liaison (5) du composant (1) au corps (20) constitué d'un bord périphérique continu (5) sensiblement parallèle à l'extrémité du corps tubulaire (20) de façon à coopérer avec ladite extrémité, et PAR LE FAIT QUE le bord périphérique (5) dudit composant de fermeture (1) est rendu solidaire à l'extrémité du corps (20) dans leur zone de contact.- comprises connecting members (5) of the component (1) to the body (20) consisting of a continuous peripheral edge (5) substantially parallel to the end of the tubular body (20) so as to cooperate with said end, and BY THE FACT THAT the peripheral edge (5) of said closure component (1) is made integral with the end of the body (20) in their contact zone.
13. Contenant selon la revendication 12, CARACTERISE PAR LE13. Container according to claim 12, CHARACTERIZED BY THE
FAIT QUE le susdit composant de fermeture (1) est engagé dans le corps tubulaire (20) dudit contenant avec son bord périphérique (5) dirigé vers l'extérieur dudit corps (20)FACT THAT the above closure component (1) is engaged in the tubular body (20) of said container with its peripheral edge (5) directed towards the outside of said body (20)
14. Contenant selon la revendication 12, CARACTERISE PAR LE14. Container according to claim 12, CHARACTERIZED BY THE
FAIT QUE le susdit composant de fermeture (1) est engagé dans le corps tubulaire (20) dudit contenant avec son bord périphérique (5) dirigé vers l'intérieur dudit corps (20).FACT THAT the above closure component (1) is engaged in the tubular body (20) of said container with its peripheral edge (5) directed towards the interior of said body (20).
15. Contenant selon la revendication 12, CARACTERISE PAR LE FAIT QUE le susdit composant de fermeture (1) est engagé sur le corps tubulaire (20) dudit contenant avec son bord périphérique (5) disposé autour de l'extrémité extérieure dudit corps (20).15. Container according to claim 12, CHARACTERIZED BY THE FACT THAT the aforesaid closure component (1) is engaged on the tubular body (20) of said container with its peripheral edge (5) disposed around the outer end of said body (20 ).
16. Contenant selon la revendication 12, CARACTERISE PAR LE FAIT QUE ledit corps de contenant (20) est en matière synthétique. 16. Container according to claim 12, CHARACTERIZED BY THE FACT THAT said container body (20) is made of synthetic material.
17. Contenant selon la revendication 12, CARACTERISE PAR LE17. Container according to claim 12, CHARACTERIZED BY THE
FAIT QUE ledit corps du contenant (20) est en carton ou matériau similaire, et PAR LE FAIT QUE l'une au moins des deux parois en contact de l'extrémité du corps (20) et du bord périphérique (5) du composant de fermeture (1) est revêtue ou constituée dans la zone de soudure, partiellement ou en totalité, d'un matériau soudable ou collable. FACT THAT said container body (20) is made of cardboard or similar material, AND BY THE FACT THAT at least one of the two walls in contact with the end of the body (20) and the peripheral edge (5) of the component closure (1) is coated or formed in the weld zone, partially or entirely, of a weldable or bondable material.
18. Contenant selon l'une quelconque des revendications 12 à 17, CARACTERISE PAR LE FAIT QUE le corps tubulaire (20) dudit contenant en carton ou matériau similaire est formé par courbure sur elle-même d'une feuille originellement plane. 18. Container according to any one of claims 12 to 17, CHARACTERIZED BY THE FACT THAT the tubular body (20) of said cardboard container or similar material is formed by curvature on itself of an originally flat sheet.
19. Contenant selon les revendications 12 et 13, CARACTERISE PAR LE FAIT QUE le bord périphérique (5) dudit composant de fermeture (1) obtenu par thermoformage possède deux parois parallèles (5b et 5ç) en une seule pièce réunies par un repli (5d) de leur matière constitutive et séparées par un espace ouvert formant une rainure continue adoptant en section la forme générale d'un U avec ses deux branches (5b et 5ç) et sa base (5d) et dont la largeur est sensiblement égale à l'épaisseur des parois du corps tubulaire (20), afin que l'extrémité dudit corps (20) puisse s'insérer intégralement dans ladite rainure. 19. Container according to claims 12 and 13, CHARACTERIZED BY THE FACT THAT the peripheral edge (5) of said closure component (1) obtained by thermoforming has two parallel walls (5b and 5c) in one piece joined by a fold (5d ) of their constituent material and separated by an open space forming a continuous groove adopting in section the general shape of a U with its two branches (5b and 5c) and its base (5d) and whose width is substantially equal to the thickness of the walls of the tubular body (20), so that the end of said body (20) can be fully inserted into said groove.
20. Contenant selon la revendication 19, CARACTERISE PAR LE FAIT QUE la susdite branche externe (5ç_) de ladite rainure périphérique en forme de U est plus courte que la branche interne (5b) .20. Container according to claim 19, CHARACTERIZED BY THE FACT THAT the said external branch (5ç_) of said U-shaped peripheral groove is shorter than the internal branch (5b).
21 Contenant selon la revendication 19, CARACTERISE PAR LE FAIT QUE la susdite branche externe (5çJ de ladite rainure périphérique en forme de U est prolongée d'une jupe périphérique (5ç') dont :21 Container according to claim 19, CHARACTERIZED BY THE FACT THAT the said external branch (5çJ of said peripheral U-shaped groove is extended by a peripheral skirt (5ç ') of which:
- d'une part, l'angle d'ouverture α qu'elle forme avec le plan de symétrie du composant de fermeture (1) est suffisamment grand pour faciliter le guidage de l'extrémité du corps (20) dans ladite rainure du U et suffisamment petit pour permettre son rabat par thermoformage contre la paroi externe de l'extrémité du corps (20) introduit dans ladite rainure,- On the one hand, the opening angle α which it forms with the plane of symmetry of the closure component (1) is large enough to facilitate guiding the end of the body (20) in said groove of the U and small enough to allow its flap by thermoforming against the external wall of the end of the body (20) introduced into said groove,
- et d'autre part, la longueur "1" est suffisamment longue pour faire office de bras de levier permettant son rabat lors de l'opération d'assemblage par thermoformage contre la paroi externe de l'extrémité du corps (20) introduit dans ladite rainure, et suffisamment courte pour éviter la formation de "vagues" inesthétiques lors de l'opération d'assemblage par thermoformage. - And on the other hand, the length "1" is long enough to act as a lever arm allowing its flap during the assembly operation by thermoforming against the external wall of the end of the body (20) introduced into said groove, and short enough to avoid the formation of unsightly "waves" during the assembly operation by thermoforming.
22. Contenant selon la revendication 19, CARACTERISE PAR LE FAIT QUE la branche interne (5b) de ladite rainure périphérique en forme de U offre d'une part, en coupe horizontale une surface de sa paroi externe légèrement supérieure à la surface de la paroi intérieure de l'extrémité du corps (20) pour assurer un étroit contact entre les deux dites parois et d'autre part, une hauteur suffisante pour assurer une bonne tenue mécanique et une surface active d'adhésion suffisante dans la zone de contact entre les deux parois pour assurer l'assemblage par thermosoudage.22. Container according to claim 19, CHARACTERIZED BY THE FACT THAT the internal branch (5b) of said peripheral groove in U-shaped offers on the one hand, in horizontal section an area of its outer wall slightly greater than the area of the inner wall of the end of the body (20) to ensure close contact between the two said walls and on the other apart, a sufficient height to ensure good mechanical strength and a sufficient active adhesion surface in the contact zone between the two walls to ensure the assembly by heat sealing.
23. Contenant selon la revendication 19, CARACTERISE PAR LE FAIT QUE la portion assurant la liaison de l'extrémité libre de la branche interne (5b) de ladite rainure périphérique en forme de U à la partie de fermeture (2) du composant de fermeture (1) adopte une pente suffisante pour faciliter le guidage de l'extrémité du corps (20) dans ladite rainure du U.23. Container according to claim 19, CHARACTERIZED BY THE FACT THAT the portion ensuring the connection of the free end of the internal branch (5b) of said U-shaped peripheral groove to the closure part (2) of the closure component (1) adopts a sufficient slope to facilitate the guiding of the end of the body (20) in said groove of the U.
24. Procédé d'assemblage d'un composant de fermeture (1) au corps tubulaire d'un contenant (20), selon lequel ledit composant, fabriqué par thermoformage selon l'une quelconque des revendications 12 à 23, comprend une partie centrale de fermeture (2) sensiblement perpendiculaire à l'axe longitudinal dudit corps tubulaire (20) et un bord périphérique continu (5) sensiblement parallèle à l'extrémité du corps tubulaire (20) de façon à coopérer avec ladite extrémité dans leur zone de contact, CARACTERISE EN CE Qu'il consiste :24. A method of assembling a closure component (1) to the tubular body of a container (20), according to which said component, produced by thermoforming according to any one of claims 12 to 23, comprises a central part of closure (2) substantially perpendicular to the longitudinal axis of said tubular body (20) and a continuous peripheral edge (5) substantially parallel to the end of the tubular body (20) so as to cooperate with said end in their contact zone, CHARACTERIZED IN THAT It consists:
- dans un premier temps, à insérer le composant (1) dans le corps tubulaire (20) de manière à mettre en vis-à-vis les zones de contact de l'extrémité du corps (20) du contenant et du bord périphérique (5) du composant de fermeture (1),- firstly, to insert the component (1) in the tubular body (20) so as to face the contact areas of the end of the body (20) of the container and the peripheral edge ( 5) of the closing component (1),
- et dans un deuxième temps, à réaliser sur une certaine hauteur de l'extrémité dudit corps tubulaire (20), une liaison périphérique continue entre ladite extrémité et le bord périphérique (5) du composant de fermeture (1).- And in a second step, to achieve over a certain height of the end of said tubular body (20), a continuous peripheral connection between said end and the peripheral edge (5) of the closure component (1).
25. Dispositif d'assemblage d'un composant (1) au corps du contenant (20) permettant de mettre en oeuvre le procédé d'assemblage selon la revendication 24, et selon lequel le composant de fermeture (1) est fabriqué par thermoformage selon l'ensemble des revendications 19 à 23, CARACTERISE PAR LE FAIT QU'il est constitué par un outillage de thermoscellage (O) comportant au moins une matrice (M) formée par un manchon chauffant qui, animé d'un mouvement de va et vient le long de l'axe longitudinal du corps tubulaire de contenant (20), présente en coupe horizontale une surface intérieure légèrement supérieure à 5 celle de la paroi externe de la branche externe (5ç_) du U du bord périphérique (5) du composant de fermeture (1) de manière à venir en contact lors de son mouvement de descente contre la jupe périphérique (5ç_') qu'elle rabat et qu'elle plaque par thermodéformation dans l'axe de prolongement de la branche externe 0 (5cJ, contre la paroi externe de l'extrémité dudit corps tubulaire (20) préalablement introduite dans la rainure du U du composant (1).25. Device for assembling a component (1) to the body of the container (20) allowing the assembly method according to claim 24 to be implemented, and according to which the closure component (1) is produced by thermoforming according to all of claims 19 to 23, CHARACTERIZED BY THE FACT THAT it is constituted by a heat-sealing tool (O) comprising at least one matrix (M) formed by a heating sleeve which, animated back and forth along the longitudinal axis of the tubular body of container (20), has in horizontal section an interior surface slightly greater than 5 that of the external wall of the external branch (5ç_) of the U of the peripheral edge (5) of the closure component (1) so as to come into contact during its downward movement against the peripheral skirt (5ç_ ') that it flaps and it plates by heat deformation in the axis of extension of the outer branch 0 (5cJ, against the outer wall of the end of said tubular body (20) previously introduced into the groove of the U of the component (1).
26. Dispositif d'assemblage selon la revendication 25, CARACTERISE PAR LE FAIT QUE le bord d'attaque (M') du susdit 5 manchon chauffant est évasé selon un angle d'ouverture α' par rapport à l'axe longitudinal du corps tubulaire (20) légèrement inférieur à celui de l'angle d'ouverture α de la susdite jupe périphérique (5ç') pour que l'opération de rabat et de placage par thermodéformation contre la paroi externe de l'extrémité du corps o (20) s'effectue progressivement au mouvement de descente (flèche Dm) dudit manchon.26. An assembly device according to claim 25, CHARACTERIZED BY THE FACT THAT the leading edge (M ') of the above 5 heating sleeve is flared at an opening angle α' relative to the longitudinal axis of the tubular body (20) slightly less than that of the opening angle α of the aforesaid peripheral skirt (5 ′) so that the operation of flap and plating by heat deformation against the external wall of the end of the body o (20) takes place gradually with the downward movement (arrow D m ) of said sleeve.
27. Dispositif d'assemblage selon la revendication 25, CARACTERISE PAR LE FAIT QUE le susdit outillage de thermoscellage (0) comporte un poinçon chauffant (P) qui, également animé d'un 5 mouvement de va et vient le long de l'axe longitudinal du corps tubulaire (20), adopte extérieurement une forme tronconique dont la base inférieure a une surface plus petite que la surface en coupe horizontale de la paroi interne de la branche interne (5b) du U du du bord périphérique (5) du composant de fermeture (1) et dont la 0 base supérieure a une surface plus grande que celle de ladite paroi interne de la branche interne (5b) de telle sorte que la paroi externe oblique du poinçon exerce une pression sur l'extrémité haute de la paroi interne de la branche interne (5b) du bord périphérique (5) du composant de fermeture (1) proportionnelle au 5 mouvement de descente (flèche Dp) dudit poinçon, jusqu'à un point bas limite où l'extrémité du corps de contenant 20 enserrée à l'intérieur de la rainure en forme de U du bord périphérique (5) soit comprimée au maximum entre la matrice (M) et le poinçon (P) .27. An assembly device according to claim 25, CHARACTERIZED BY THE FACT THAT the aforementioned heat-sealing tool (0) comprises a heating punch (P) which, also animated by a back and forth movement along the axis longitudinal of the tubular body (20), externally adopts a frustoconical shape whose lower base has a smaller surface than the surface in horizontal section of the internal wall of the internal branch (5b) of the U of the peripheral edge (5) of the component closure (1) and whose upper 0 base has a larger area than that of said inner wall of the inner branch (5b) so that the oblique outer wall of the punch exerts pressure on the upper end of the wall internal of the internal branch (5b) of the peripheral edge (5) of the closure component (1) proportional to the downward movement (arrow Dp) of said punch, to a low point where the end of the container body 20 enclosed inside ior of the U-shaped groove of the peripheral edge (5) is compressed as much as possible between the die (M) and the punch (P).
28. Dispositif d'assemblage selon les revendications 25 à 27, CARACTERISE PAR LE FAIT QUE le poinçon chauffant (P) du susdit outillage de thermoscellage (0) amorce sa descente (flèche Dp) lorsque le mouvement de descente (flèche Dm) de la matrice (M) est terminée.28. Assembly device according to claims 25 to 27, CHARACTERIZED BY THE FACT THAT the heating punch (P) of the above heat-sealing tool (0) begins its descent (arrow Dp) when the descent movement (arrow Dm) of the matrix (M) is complete.
29. Dispositif d'assemblage selon les revendications 25 à 27, CARACTERISE PAR LE FAIT QUE la température de chauffage du poinçon chauffant (P) permettant d'assurer un thermoscellage intérieur est plus importante que celle de la matrice périphérique (M) permettant d'assurer un thermoformage de la jupe extérieure (5ç' ) . 29. An assembly device according to claims 25 to 27, CHARACTERIZED BY THE FACT THAT the heating temperature of the heating punch (P) making it possible to heat-seal the interior is greater than that of the peripheral matrix (M) making it possible to thermoform the outer skirt (5ç ').
EP99915840A 1998-04-28 1999-04-27 Container neck and method for making same, and container with assembling method and device Withdrawn EP1075425A2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9805324A FR2777863B1 (en) 1998-04-28 1998-04-28 CONTAINER HAVING AN ORIFICE SURROUNDED BY A NECK THAT CAN ALWAYS BE SEALED AND SUCCESSIVE CAPS AND METHOD FOR MANUFACTURING THE CONTAINER
FR9805324 1998-04-28
PCT/FR1999/000987 WO1999055588A2 (en) 1998-04-28 1999-04-27 Container neck and method for making same, and container

Publications (1)

Publication Number Publication Date
EP1075425A2 true EP1075425A2 (en) 2001-02-14

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Application Number Title Priority Date Filing Date
EP99915840A Withdrawn EP1075425A2 (en) 1998-04-28 1999-04-27 Container neck and method for making same, and container with assembling method and device

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EP (1) EP1075425A2 (en)
AU (1) AU3427999A (en)
FR (1) FR2777863B1 (en)
WO (1) WO1999055588A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2809085B1 (en) 2000-05-22 2002-12-27 Europ Food Distrib E F D PROCESS FOR SEALING A CONTAINER OR PACKAGING IN A SEALED AND HERMETICALLY WAY, A MEMBER FOR SEALING SUCH A PACKAGE OR CONTAINER AND CONTAINER OR PACKAGING OBTAINED BY THIS PROCESS
EP1645516A1 (en) * 2004-10-11 2006-04-12 Julian Haswell Tubular container
WO2016073943A1 (en) * 2014-11-06 2016-05-12 Rodella Kristina Cork and paperboard beverage-packaging container

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Publication number Priority date Publication date Assignee Title
DE1536131A1 (en) * 1966-09-13 1969-12-11 Landor Walter Disposable containers made of cardboard or other flexible material, with a lid
US4074961A (en) * 1972-03-02 1978-02-21 Altstadter Verpackungs-Vertriebs Gmbh Apparatus for producing containers
US4183457A (en) * 1978-08-09 1980-01-15 Weatherchem Corporation Shrink tape closure
GB2163124A (en) * 1984-06-25 1986-02-19 Vercon Inc Thermoplastic container end spinwelded to container body
EP0179199A3 (en) * 1984-10-22 1988-01-20 Anchor Hocking Corporation Vacuum indicating button on plastic closure caps
DE3601352A1 (en) * 1986-01-18 1987-07-23 Altstaedter Verpack Vertrieb PACKAGE FOR FLOWABLE FILLING PRODUCTS WITH GLASS WALLS
FR2690896B1 (en) 1992-05-06 1996-03-29 Bodet Jean CONTAINER PROVIDED WITH A SEQUENCE OF SUCCESSIVE OPENINGS AND CLOSURES AND METHOD FOR THE PRODUCTION THEREOF.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9955588A2 *

Also Published As

Publication number Publication date
WO1999055588A3 (en) 2000-02-17
FR2777863B1 (en) 2000-07-28
WO1999055588A2 (en) 1999-11-04
FR2777863A1 (en) 1999-10-29
AU3427999A (en) 1999-11-16

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