Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
  • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
  • B65B51/02—Applying adhesives or sealing liquids
  • B65B51/023—Applying adhesives or sealing liquids using applicator nozzles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
  • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
  • B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
  • B05C11/025—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an essentially cylindrical body, e.g. roll or rod
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
  • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
  • B05C11/1042—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material provided with means for heating or cooling the liquid or other fluent material in the supplying means upstream of the applying apparatus
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
  • B05C5/002—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the work consisting of separate articles
  • B05C5/004—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the work consisting of separate articles the work consisting of separate rectangular flat articles, e.g. flat sheets
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
  • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
  • B05C5/0208—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work for applying liquid or other fluent material to separate articles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
  • B31B50/60—Uniting opposed surfaces or edges; Taping
  • B31B50/62—Uniting opposed surfaces or edges; Taping by adhesives
  • B31B50/622—Applying glue on already formed boxes
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
  • Y10T156/10—Methods of surface bonding and/or assembly therefor
  • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
  • Y10T156/10—Methods of surface bonding and/or assembly therefor
  • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
  • Y10T156/1062—Prior to assembly
  • Y10T156/1075—Prior to assembly of plural laminae from single stock and assembling to each other or to additional lamina
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
  • Y10T156/10—Methods of surface bonding and/or assembly therefor
  • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
  • Y10T156/108—Flash, trim or excess removal
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
  • Y10T156/12—Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing
  • Y10T156/1374—Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing with means projecting fluid against work
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
  • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
  • Y10T156/1702—For plural parts or plural areas of single part
  • Y10T156/1712—Indefinite or running length work
  • Y10T156/1722—Means applying fluent adhesive or adhesive activator material between layers
  • Y10T156/1724—At spaced areas
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
  • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
  • Y10T156/1702—For plural parts or plural areas of single part
  • Y10T156/1712—Indefinite or running length work
  • Y10T156/1722—Means applying fluent adhesive or adhesive activator material between layers
  • Y10T156/1727—Plural indefinite length or running length workpieces
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
  • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
  • Y10T156/1798—Surface bonding means and/or assemblymeans with work feeding or handling means with liquid adhesive or adhesive activator applying means

Definitions

• the present invention essentially relates to this second family which groups all the cases where an adhesive must first be deposited on a part, or "support”, then the support coated with adhesive, which should only be used subsequently , sometimes very long after, to bring the first support to a so-called “destination” surface, after all kinds of events have taken place: printing, processing, storage, packaging, transport, delivery, new storage, retail destocking, various manipulations , etc.
• the problem to be resolved is therefore to mask the adhesive so that it does not accidentally adhere to other objects and to protect it against dust retention as well as against aging (drying, oxidation, etc. .).
• the solution adopted consists in placing a tape associated with silicones on the adhesive, which adheres very little to the adhesive.
• "self-adhesive" adhesives are ill-suited to materials which are not either regular and rigid or, on the contrary, very flexible so that the destination surface matches the support.
• a characteristic example of a poorly suited material is corrugated cardboard and it is this which is used here to explain the invention, although the latter has many other applications for various materials.
• a sheet of corrugated cardboard essentially has a corrugated face and a so-called "flat" face, although one observes this one with attention one discerns, even with the naked eye, fairly well marked depressions.
• the most frequently encountered sheet of corrugated cardboard has two flat faces placed on either side of a core having corrugations, or grooves.
• a sheet of corrugated cardboard a more complex structure: two corrugated cores and three flat faces, two outer and one inner separating the two corrugated cores, for example.
• a ribbon of thin material is used, impermeable to the adhesive and weakly sensitive to the action of said adhesive.
• One of the two sides of this tape is coated with adhesive, with the possible use of a treatment allowing the adhesive to "hang" more on one side than on the other.
• This adhesive-tape set is stored on a reel.
• the tape is applied by its coated side and the adhesive meets a material conducive to its adhesion.
• the sheet-adhesive-tape assembly is then stored, transported, distributed, etc. until the actual use of the adhesive which is deferred in time compared to when the adhesive was applied to the tape.
• the sheet of corrugated cardboard is a constituent part of a blank intended to form a container.
• tapes comprising a central strip coated with an adhesive on both sides and made of a material on which the adhesive hangs vigorously.
• a protective tape is placed which is weakly sensitive to the action of the adhesive and, therefore, capable of being easily removed. It is generally a ribbon made of paper or synthetic material associated with symbols. The entire central strip, the two layers of adhesive and the protective tape is wound up to be stored in reels.
• the tape is of the type comprising a central strip, the latter is thus fixed once and for all on the support and the adhesive applied will never be used again or even unmasked.
• the support-central strip-adhesive-protective tape assembly is then stored, transported, distributed until the user has to use the adhesive, for example to close an envelope, by sticking a flap (support) on the envelope itself (destination surface) or to close a container of any other type.
• the present invention overcomes all the drawbacks mentioned above and makes it possible to obtain supports: sheets or panels of any material, provided with a long-acting adhesive for a deferred use of this adhesive and, what, whether the quality of the supports, the regularity or the irregularity of the surfaces present, the fineness or the thickness of the materials used.
• the subject of the invention is a method for manufacturing a product consisting of a support on which there is a long-acting adhesive and a protective tape for deferred use of said adhesive, characterized in that the we choose a support with one side to receive the adhesive has irregularities, we heat the adhesive to a temperature at which it is pasty at the limit of the liquid state, then we lead it to at least one orifice opening above a plane on which the support is placed, and then causing it to flow at the same time as causing a relative movement between the support and the orifice so that the adhesive is deposited on the support according to at least one thick bead, in particular continuous, that the temperature of the deposited adhesive is lowered to increase its viscosity until it is pasty at the limit of the solid state, and that a pressure is exerted on the pasty adhesive inée to cause the lateral spreading and the rolling of the cord over its entire length, then that it is optionally carried out at least a subsequent cutting of the product consisting of a support, a
• the product is intended to be shaped after placement of the adhesive and protective tape, to form a finished article, ready for use by using the adhesive discovered by removing the protective tape;
• the support being made of a relatively rigid material, it is subjected to a pressure force located in the area where the adhesive must flow, in order to obtain a softening of the support which, in this area, thus becomes more flexible than at 1 Origin;
• the pressure force concerns a strip whose width is greater than that of the adhesive after spreading;
• the pressure force is calibrated to be greater than the elastic resistance of the material forming the support; - the support material having an internal honeycomb structure, as is the case of corrugated cardboard whose grooves create longitudinal cells, the pressure force is calibrated to be able to break the walls of the cells forming spacers between two opposite faces of the support, but insufficient to remove any elasticity perpendicular to said faces;
• the temperature of the adhesive is lowered by simple absence of heating and by causing the relative movement at a speed such that the time which elapses between the adhesive and its spreading by pressure corresponds to the desired temperature reduction;
• the adhesive bead is subjected to positive cooling means, such as a flow of cold air;
• the support is made of cardboard or similar material, a strip of thin material, impermeable to the adhesive and weakly sensitive to the action of said adhesive, is placed on the adhesive bead previously deposited on the support, and in order to spread the bead of adhesive on the support, pressure is exerted on the tape;
• the support is made of cardboard or similar material wound over a great length in the form of a coil, at least one bead of longitudinal adhesive is deposited at the same time as the support is unrolled, a ribbon of thin material is placed on the bead , impermeable to the adhesive and weakly sensitive to the action of said adhesive, in order to spread the bead of adhesive on the support, pressure is exerted on the ribbon and this assembly is wound up on a spool for storage;
• the support is made of cardboard or similar material wound over a great length in the form of a coil, at least one bead of longitudinal adhesive is deposited at the same time as the support is unrolled, a ribbon of thin material is placed on the bead , impermeable to the adhesive and weakly sensitive to the action of said adhesive, in order to spread the bead of adhesive on the support, pressure is exerted on the tape, this assembly is wound up on a reel for storage, then , before using the adhesive, the support is cut into panels intended to constitute blanks, in particular for obtaining containers;
• the support is a panel of cardboard or similar material
• at least one bead is deposited on said panel with a first edge which the latter has at a second edge opposite to the previous one
• a ribbon of thin material is placed on the cord, impermeable to the adhesive and weakly sensitive to the action of said adhesive, in order to spread the bead of adhesive on the support, pressure is exerted on the tape then, optionally, imperfect margins are eliminated.
• the support is a panel of cardboard or similar material, several panels are brought in one after the other, leaving a space between them, at least one bead is deposited on each panel with a first edge which they present to a second edge opposite the previous one, a ribbon of thin material is applied to the cord, impermeable to the adhesive and slightly sensitive to the action of said adhesive, a ribbon which is continuous and which extends from one panel to another. above the space which separates them and, in order to spread the bead of adhesive on each panel, pressure is exerted on the ribbon directly above each panel, then a ribbon is cut between the panels;
• the cut is made between the two edges opposite two neighboring panels; - the cut leaves at least one segment of ribbon remaining beyond at least one of the edges of each panel;
• the support is made of cardboard or similar material
• a ribbon of thin material is applied to the bead of adhesive deposited, impermeable to the adhesive and slightly sensitive to the action of said adhesive, in order to spread the bead of adhesive over the support, pressure is exerted on the tape, the quantity of adhesive deposited and the value of the pressure exerted on the tape being coordinated so that after spreading the bead, the width that the adhesive occupies on the support is at most equal to that of said ribbon;
• the support is made of cardboard or similar material, a ribbon of thin material is applied to the bead of adhesive deposited, impermeable to the adhesive and slightly sensitive to the action of said adhesive and the bead is spread only when the temperature to which it has dropped after being deposited on the support has sufficiently increased its viscosity so that its degree of adhesion to the ribbon of thin material is significantly lower than the degree of adhesion that it has with the support;
• the support is made of cardboard or similar material
• the adhesive is caused to flow through an orifice which has a section and an orientation such that the adhesive bead deposited by flow has a substantially circular section
• the tape is laid in thin material at a certain distance from said orifice by coordinating this distance, the temperature at which the adhesive is deposited on the support and the speed of the relative displacement, so that the bead of adhesive sags a little laterally, then we place on the adhesive bead a ribbon of thin material, impermeable to the adhesive and weakly sensitive to the action of said adhesive and in order to spread the adhesive bead on the support, pressure is exerted on the ribbon;
• the support is made of cardboard or similar material, at least one bead of adhesive is deposited, a ribbon of thin material is applied thereon, impermeable to the adhesive and weakly sensitive to the action of said adhesive, in order to spread the bead of adhesive on the support, apply pressure to the tape, deposit and laminate at least one bead of adhesive in sufficient quantity so that the bead, after spreading, fills all said irregularities and furthermore provides the ribbon of thin material with a flat and continuous surface;
• the support is made of cardboard or similar deformable material, the support is leveled at least according to the area to receive said adhesive, at least one bead of adhesive is applied, a ribbon of thin material, impermeable to water, is placed on it adhesive and weakly sensitive to the action of said adhesive and in order to spread the bead of adhesive on the support, pressure is exerted on the tape;
• the support is made of cardboard or similar deformable material, a regular recess is produced over the entire area which is to receive said adhesive, at least one bead of adhesive is deposited in said recess, a ribbon of thin, impermeable material is placed on said bead to the adhesive and weakly sensitive to the action of said adhesive, in order to spread the bead of adhesive in the hollow of the support, pressure is exerted on the tape, the depth of said hollow being substantially equal to the total thickness of l spread adhesive tape and thin material; - The adhesive is heated, it is circulated in a closed circuit conduit and the said flow is caused by removing a fraction of adhesive circulating in the closed circuit conduit;
• the adhesive is heated, it is circulated in a closed circuit conduit, the adhesive which circulates in the closed circuit is maintained substantially at the temperature which it must have for its flow and one causes said flow by removing a fraction of adhesive flowing in the closed circuit conduit; -the adhesive is heated, it is circulated in a closed-circuit duct, a fraction of adhesive circulating in the closed-circuit duct is taken, the temperature of the adhesive fraction removed is increased and then provoked the flow of said fraction.
• the invention also relates to a device for manufacturing a product consisting of a support on which there is a long-acting adhesive and a protective tape, for a deferred use of said adhesive, characterized in that it comprises a frame, guides for at least one support intended to receive adhesive, at least one adhesive reservoir, means for heating said adhesive in the reservoir, at least a conduit extending from the reservoir to at least one orifice, means for closing and opening the conduit close to the orifice as well as means for controlling said means for closing and opening, means for setting in relative motion of said orifice and at least one support intended to receive adhesive, means capable of exerting pressure and rolling in a direction substantially perpendicular to a plane in which the support intended to receive must be located adhesive and means for removing supports after receiving adhesive.
• this device it is located in a room at room temperature and that the means capable of exerting pressure and rolling are distant from 1 orifice;
• - It comprises means for storing at least one support made of cardboard or similar material, means for storing at least one strip of thin material, impermeable to the adhesive and weakly sensitive to the action of said adhesive, means for depositing adhesive, means for guiding said tape over adhesive deposited on the support, means for simultaneously pressing the tape on the adhesive and adhesive on the support as well as means for discharging in storage view of the support-adhesive-tape assembly;
• - It comprises means for supporting at least one support coil of cardboard or similar material, means for depositing adhesive, means for unrolling the support and making it pass opposite at least one flow orifice d adhesive, means for storing at least one ribbon of thin material, impermeable to the adhesive and weakly sensitive to the action of said adhesive, means for guiding said ribbon over the adhesive deposited on the support, means for simultaneously pressing the tape on the adhesive and the adhesive on the support, means for winding the support-tape adhesive assembly according to at least one reel and means for supporting said reel;
• - It comprises means for storing at least one stack of panels of cardboard or similar material, means for removing and distributing said panels one by one, means for guiding said panels, means for unitary movement of said panels in view of their running opposite at least one adhesive flow orifice, means; for depositing adhesive with a first edge that each panel has at a second edge opposite to the first, means for storing at least one strip of thin material, impermeable to the adhesive and weakly sensitive to the action of said adhesive, means for
• - It comprises means for storing at least one stack of panels of cardboard or similar material, means for removing and distributing said panels one by one, means for guiding said panels, means for unitary movement of said panels in view of their running opposite at least one adhesive flow orifice, means for depositing adhesive from a first edge that each panel has at a second edge opposite to the first, means for storing at least less a ribbon of thin material, impermeable to the adhesive and weakly sensitive to the action of said adhesive, means for guiding said ribbon over the adhesive deposited on each panel, means for simultaneously pressing the ribbon on the adhesive and adhesive on each panel, means for simultaneously cutting said tape and a small fraction of the panel near the first and second edges of each panel, means for discharging the cut fractions, means for discharging the panel-adhesive-tape assembly and means for depositing each of said assemblies one on the other to constitute at least one pile;
• - It includes a frame, guides for at least one support intended to receive adhesive, at least one adhesive reservoir. means for heating said adhesive in the reservoir, at least one conduit extending in a closed circuit to and from said reservoir, a branch in heat-conducting material, which is connected to said conduit, which ends in an orifice and which comprises sealing and opening means, heating members being placed outside said branch, the device further comprising means for regulating the heating means of the tank and heating members of the branch.
• Figure 1 is a schematic view of a device according to the invention, applied to obtaining sheets of great length having at least one line of adhesive.
• Figure 2 is a schematic view of a device according to the invention, applied to obtaining panels, or plates, having at least one line of adhesive.
• Figures 3 and 4 are two schematic views illustrating a phase of the process according to one invention and providing a preparation of the support before the introduction of the adhesive.
• Figure 5 is a schematic view in longitudinal section showing the phase of the process according to the invention which corresponds to the combination of a support, the adhesive and a protective tape.
• Figure 6 is a schematic cross-sectional view showing the phase of the process according to the invention which corresponds to the deposition of the adhesive on a support.
• Figure 7 is a schematic cross-sectional view showing the phase of the process according to the invention which corresponds to the deposition of the protective tape on the adhesive.
• Figure 8 is a schematic cross-sectional view showing the phase of the process according to the invention which corresponds to the combination of the support, the adhesive and the protective tape.
• Figures 9 and 10 are partial schematic views illustrating a possibility that gives the method according to the invention for finishing a support having at least one line of adhesive.
• Figures 11 and 12 are schematic sectional views showing the manner in which the adhesive is associated with a corrugated cardboard support of irregular surface, using the method according to the invention.
• FIG. 13 is a partial schematic view illustrating a variant of the method according to the invention according to which the adhesive and the protective tape are deposited in a groove whose depth is equal to the thickness of the adhesive and of the tape. protection.
• Figure 14 is a schematic view in longitudinal section of a machine according to the invention and allowing the industrial implementation of the method of the invention.
• Figure 15 is a partial schematic view illustrating the implementation of the method according to the invention for obtaining a correct adhesive bead on supports formed by separate panels, or plates.
• Figures 16, 17 and 18 are schematic views illustrating the possibility offered by the invention to obtain continuous or discontinuous adhesive tapes.
• Figure 19 is a schematic view illustrating a variant of the invention according to which the supports are separate panels while the protective tape is continuous.
• a certain amount of adhesive 2 is heated to about 175 degrees Celsius to bring it to a consistency according to which it is still pasty but at the limit of liquid state.
• the adhesive is brought to an orifice 4 opening above a fixed plane 5 on which a support is placed.
• FIG 1 there is shown the case where the support consists of corrugated cardboard 6 stored in a reel 7.
• the corrugated cardboard 6 is guided to extend on the plane 5 and to be moved by traction (as is known per se) parallel to this. Passing vertically from the orifice 4, the corrugated cardboard 6 receives adhesive 2 which flows at a regulated rate so that it is deposited according to a thick bead 10.
• the temperature of the bead adhesive 10 must be lowered so that its viscosity increases until its consistency is pasty, at the limit of the solid state.
• the room in which the method is implemented is at room temperature and the lowering of temperature is obtained by simple absence of heating by adjusting the speed of movement of the corrugated board 6 relative to the fixed support. 5.
• a pressure is exerted on it intended to cause its lateral spreading (perpendicular to the direction of its movement) and its rolling over its entire length (parallel to the direction of its movement).
• This pressure is provided by a roller 11 associated with a jack 12 which urges it along the arrow F1 in the direction of the fixed support 5.
• the cord 10 is crushed so as to finally have only a fairly small thickness compared to that which it presented before being subjected to the pressure of the roller 11, controlled by the jack 12.
• the corrugated board 6 - adhesive 2 assembly is then wound in a spiral to form a coil 13. This constitutes a product according to the invention.
• This product being a reel of corrugated cardboard provided with a bead of adhesive 10
• the adhesive can be used during this shaping or later, for example for closing the finished article if it is a container (box, box, case, envelope, etc.).
• L " 1 adhesive 2-10 is, of course, always active since it is intended to be used later but it must be isolated from the outside so that it is protected from dirt and to avoid that the cardboard thus coated accidentally sticks to other objects.
• a protective tape 15 is provided which is unwound from a reel 16 and which is guided over the bead of adhesive 10 just before it is pressed by the roller 11.
• the adhesive tape 10 is no longer crushed directly but with the interposition of the protective tape 15.
• the bead of adhesive 10 can be subjected to positive cooling means (not shown) such as a flow of cold air or a cooling tunnel.
• positive cooling means such as a flow of cold air or a cooling tunnel.
• FIG. 2 a variant is shown according to which the support is no longer continuous over a great length but consists of successive individual panels.
• the panels 20 are, for example, of "double-sided” corrugated cardboard, that is to say that they come from cutting from a sheet of corrugated cardboard comprising a corrugated core and a sheet on each of its two faces, to present two so-called flat faces.
• containers of low price are generally created, in particular for shipments by post or by courier.
• the panels 20 are stored in a stack from which they are extracted one by one to be individually driven under the orifice 4 and then under the pressure roller 11.
• Each panel 20 being individualized, provision is made here for the protective tape 15 to be interrupted between two successive panels 20 by a cut made as close as possible to the downstream and upstream edges of each panel 20.
• the essential problem of a delayed use adhesive results from the fact that the destination surface is often different from the surface of the support.
• the adhesive in order to join the support and the destination surface, the adhesive must necessarily be as effective for one as for the other.
• the present invention makes it possible to solve the most difficult problem in this field, namely that which involves a support and a destination surface having surface irregularities.
• the invention provides for reducing this rigidity in the area where the adhesive is to be applied.
• FIG. 3 shows a section of a corrugated cardboard support 30 assumed to be of high quality: the paper of which it is made is of the long fiber type and of heavy weight. H has a core 31 of corrugated paper, glued to two opposite external faces 32 and 33.
• the parts 34 of the core 31 which extend between the faces 32 and 33 determine longitudinal cells, or channels, 35 and constitute as many spacers which give the support 30 a large rigidity and high resistance to crushing, that is to say that, finally, the faces 32 and 33 are very slightly deformable and that their surface irregularities: hollows 36 and bumps 37 are definitively formed.
• To apply a face 33 against a face 32 to glue them is, to the nearest scale, to try to glue two corrugated sheets.
• the support 30 is prepared for bonding to a destination surface, even before the product is completely produced.
• a pressure means such as a roller
• pressure is exerted (generally by hand) on the face opposite to that which carries the adhesive 10: if the latter has been applied to a face 32, the opposite face 33 will be pressed. If the support 30 is very rigid, the effort is insufficient to deform the face 32. With a support 30 of the type of that of FIG. 4, the pressure of the hand exerted on one side will be transmitted to the opposite side, allowing the latter to deform and, consequently, to match the irregularities of the destination surface.
• the force of the roller 38 slows the movement of the supports 30. To avoid any irregularity of movement, it is good to provide a positive drive of the supports, for example by means of bands or pebble rollers.
• roller 38 itself and, for this, provide for its positive drive by means of a geared motor of known type (not shown) and ensure that its surface in contact with the supports 30 is rough, in particular by knurling, as is known per se.
• Figure 5 on the one hand and Figures 6 to 8 on the other hand are schematic views on a larger scale than the previous ones, allowing to highlight the characteristics of the invention.
• the bead 10 While the bead 10 travels the distance X, it cools and freezes and the heating of the adhesive 2 is adjusted so that at the outlet of the orifice 4, it has a consistency such that it deforms sagging.
• the orifice 4 has a circular section so that the cord 10, when it is deposited, itself has a circular section ( Figure 6).
• the bead 10 When the bead 10 is flattened (FIGS. 8 and 9), it offers a non-negligible surface to the protective tape 15 and since the adhesive 2 is chosen for its prolonged effect, sufficient adhesion is obtained between the bead 10 and the tape 15 to avoid any slipping between them.
• This arrangement is important because it allows fairly high running speeds despite the resistance offered by the ribbon 15 wound according to the spool 16, when a traction is exerted on it. After the action of the roller 11, the tape 15 is on the adhesive 2 which no longer has the shape of a thick bead but has become a thinner and wider strip (FIG. 8).
• the quantity of adhesive 2 delivered by the orifice 4 is established so that after the pressure action of the roller 11, the adhesive strip 10 has a width at most equal to that of the protective tape 15.
• the support 20 of Figures 2, 5, 9 and 10 comprises a corrugated core 21 as well as two faces said to be flat 22 and 23.
• the reference 24 denotes the downstream edge of the panel 20 and the reference 25 its upstream edge.
• the strip of adhesive 10 has an irregular width, coming from the casting of adhesive 2 out of the orifice 4, a casting which cannot immediately provide the desired width, unlike what is obtained, according to the known technique, with orifices located in contact with the support to be coated and whose very thin section delivers the adhesive in its almost final form of coating layer. These holes are known as "lip nozzles".
• FIG. 5 it can be seen that the casting time is adjusted so that the bead 10 is interrupted a little below the upstream edge 25 because the lamination effected by the roller 11 tends to extend the strip of adhesive longitudinally in the last millimeters of the panel 20 and this must be taken into account so that the adhesive is not spilled out of the panel 20.
• the protective tape 15 has the same width as the adhesive strip 10, the provisions of FIG. 9 (in the vicinity of the two downstream edges 24 and upstream 25) can be accepted because the absence of gluing of the protective tape 15 allows you to easily grasp it by its end when you want to remove it, for the application of the support on the destination surface.
• FIG. 9 shows the outline of the cutting line 26 to show that it passes as close as possible to the imperfect end of the strip of adhesive 10.
• FIG. 10 shows the two oblique and symmetrical cut lines 26 and 27 which give the panel 20 a very attractive quality of appearance and finish.
• FIG. 11 shows a panel 20 on which a strip of adhesive 10 has been deposited, as indicated above, transversely with respect to the corrugations of the core 21. It can be seen that the faces external 22 and 23 are not absolutely flat but have depressions opposite the concave parts of the core 21. These irregularities are sometimes difficult to perceive with the naked eye but they are sufficient to make it practically impossible to apply adhesive directly economically on cardboard.
• the probabilities are high so that the concave irregularities of the support are precisely opposite concave irregularities of the destination surface and the adhesive fragments opposite concave irregularities.
• the bonding is then uncertain. It is uncertain when the attachment takes only a few hours and the assembled parts detach from each other because the adhesion surface provides a lower resistance to the stresses and stresses which stress the assembled parts.
• the adhesive fills the concave irregularities and also covers the convex irregularities with a significant thickness for the subsequent fixing of the support on the destination surface, whatever the irregularities of the latter since the adhesive has a surface to both continuous and piane.
• the strip of adhesive 10 has a thickness E opposite the concave irregularities and another thickness e_ opposite the convex irregularities. Its outer face 1 ⁇ is flat and continuous.
• FIG. 12 shows the same characteristics in the case where the strip of adhesive 10 is parallel to the corrugations of the core 21 and no longer perpendicular.
• the panels 20 often have faces 22 and 23 of different qualities.
• a good quality paper with long fibers, for the side intended to be outside the finished cardboard object (a container, for example) while for the side intended for to be inside, and therefore not visible, we choose a more ordinary paper, with short fibers, such as recycled paper.
• the adhesive 2 must precisely be deposited on the ordinary inner face (support), which is intended to be fixed on the outer face of better quality (destination surface).
• the extra thickness created by a strip of adhesive 10 and its protective tape 15 located asymmetrically, has drawbacks for the storage on a reel 12 of the corrugated cardboard 6 (FIG. 1) or for the storage in a stack of the panels 20. Or else the coil 13 becomes frustoconical instead of being cylindrical, or the panels 20 are placed askew instead of being flat.
• the invention provides first of all to create a hollow over the entire location of the adhesive strip 10, at a depth equal to the total thickness of the adhesive strip 10 and the protective tape. 15.
• This operation is easy to perform when the support is made of corrugated cardboard because it is a fairly soft material which deforms well.
• This hollow, or groove, 28 is formed upstream of the orifice 4 and can be obtained by means of a roller 14 driven in rotation and subjected to a pressure force directed perpendicular to the face.
• Controlling the temperature of the adhesive 2 deposited on the support is very important since this temperature conditions the consistency of the bead 10 and the smooth running of the process according to the invention. If one acted as simply as suggested by the diagram of FIGS. 1 and 2, one would risk having at the orifice 4 an adhesive of insufficient temperature, due in particular to the lowering of temperature in the conduit 3.
• a first precaution therefore consists of insulating the conduit 3, to avoid excessive temperature drops.
• This circuit is thus maintained at a known and stable temperature. Then, the adhesive 2 is poured through the orifice 4 by sample in this circuit and the adhesive is heated to the immediate vicinity of orifice 4 to obtain the desired temperature with great precision (of the order of a few degrees Celsius).
• a non-aqueous adhesive so that it is not absorbed by the support when the latter is hydrophilic, as is the case with cardboard.
• Such an adhesive is, for example a styrene isoprene-styrene without addition of solvents, having a viscosity of the order of 10,000 centipoise.
• FIG. 14 and 15 there is shown a device for implementing the invention constituting a complete machine ensuring common functions (supplying panels for example) and specific functions of the invention.
• the ordinary functions are provided by mechanisms known to those skilled in the art and their description will be limited to understanding the invention.
• the machine comprises a frame 40, guides for belts 41 constituting together a means of translation of the supports 20 relative to the machine itself.
• the belts
• the plane on which the panels are placed consists here of all of the translation belts 41. These are engaged on drive pinions 42 and on tension pinions 43.
• feeder 44 containing a stock of stacked supports 20 and comprising means 45 for removing these supports 20 to direct them one by one towards the belts 41 which drive them to the other end of the machine.
• the reservoir 1, the orifice 4 and an assembly 46 ensuring the supply of the protective tape 15 and the actuation of the pressure roller 11.
• the general operation of this device is as follows :
• the panels 20 are removed by the mechanism 45 and are supported by the belts 41 associated, as is known, with counter-belts together ensuring the maintenance and translation of each support 20.
• a detector 50 (FIG. 15) causes the flow of adhesive through said orifice 4 and this until another detector 51 (FIG. 15) perceives the arrival at its level of the upstream edge 25 of the panel 20, this detector 51 then causing the interruption of the flow of adhesive through the orifice 4.
• Another detector 52 (FIG. 15) supplies the protective tape 15 as soon as the upstream edge 24 of the panel 20 approaches the plumb of the pressure roller 11.
• the tape 15 adheres to the cord d adhesive 10 which has been deposited and is entrained with it under the roller 11.
• another detector 53 (FIG. 15) causes the cross-section of the protective tape 15 and, if necessary , stopping the mechanism (not shown) for unwinding and delivering the ribbon 15.
• the panel 20 is then placed on an elevator 60 which leads it, according to arrow F2, to a mechanism of known type called "stacker" 61 on which accumulate the panels 20 to a certain level and when this is reached, the entire stack is evacuated, for the storage of the panels 20, either for delivery in the state, or in view of additional operations, in particular for obtaining blanks intended to constitute containers.
• a panel 20 provided with a strip of adhesive 1Q and a protective tape 15 constitutes a product according to the invention.
• ⁇ is a semi-finished product that can be shaped in any desired manner: printing, cutting, creasing, folding, volume setting, etc.
• the adhesive can be used during this shaping or later, for example for closing the finished article if it is a container (box, box, case, envelope, etc.).
• the roller 38 which is located between the feeder 44 and the orifice 4.
• the softening zone is created just before that adhesive 2 flows over it, coming from orifice 4.
• the pressure exerted by the roller 38 is advantageously adjustable so that the machine can be used with supports of different stiffnesses, requiring variable pressures.
• roller 38 is neutralized.
• FIG. 15 illustrates the coordination of the various specific functions of the machine with an embodiment particularly well suited to controlling the flow temperature of the adhesive.
• the tank 1 is associated with a closed external circuit comprising the duct 3 and a return 70 on which there is a pump 71.
• the tank 1 is surrounded by an electrical heating resistor 72 protected by a heat-insulating lining 73.
• a conduit 74 ends with 1 orifice 4 and is connected to the closed circuit 3 - 70 of which it constitutes a bypass which receives a solenoid valve 75 acting by all or nothing: "open” or "closed".
• the bypass is surrounded by a heating resistor 76 protected by a heat-insulating lining 77 as close as possible to the orifice 4.
• the resistor 72 is supplied, and a thermostat 80 associated with a contact 81 of a relay, controls this supply to maintain the mass of adhesive 2 in pasty form at the limit of the liquid state. and at the right temperature.
• the pump 71 ensures the permanent circulation of adhesive to prevent a temperature gradient from being established between the upper layers and the lower layers of adhesive 2. This gives a stable temperature of the entire mass of adhesive 2, pretty much.
• the detector 50 is positioned so that it detects the downstream edge 24 of a panel 20 sufficiently in advance so that the substantially liquid adhesive 2 flows at the right temperature as soon as this downstream edge 24 is perpendicular to orifice 4, taking into account the following parameters:
• the detector 50 actuates the solenoid valve 75, which causes the adhesive 2 to be expelled from the closed circuit and to flow through the bypass 74.
• the temperature to which the branch 74 is brought and its length are established to obtain at the orifice 4 the desired temperature for the adhesive 2 to one or two degrees Celsius.
• the detector 51 is positioned so that it causes the solenoid valve 75 to close in time so that it no longer drips adhesive 2 beyond the downstream edge of the panels 20, taking into account the length of the bypass. 74, the contents of which continue to flow after the solenoid valve 75 has been closed.
• the double-acting cylinder 12 is supplied with pressurized fluid by two pipes (only one 82 is shown diagrammatically to simplify the drawing, this mechanism being within the reach of the skilled person) controlled by at least one solenoid valve 83.
• the control of this solenoid valve 83 is subjected to a feeler (not shown) either pre-adjusted or subject to parameters taking into account the thickness desired for the adhesive strip 10, the quality of the carton, the irregularities of its faces, etc.
• the mechanism 46 will not be described in detail since it can be of different known types, more or less complex and comprising, consequently, more or less numerous command, guidance and control members. Its order was schematized globally, by a solenoid valve 84.
• the solenoid valves 83 and 84 are slaved to the detectors 52 and 53 so that the delivery of protective tape 15 and the distance of the roller 11 from the surface of the panels 20 are constantly monitored and coordinated with the presence and absence of panels 20 on the belts 41 in the appropriate place.
• the electrical circuit is connected to a current source 85 and includes a general switch 86.
• the heating resistor 76 is regulated by a thermostat 87 which controls a switch 88.
• this schematic circuit is more complex, in particular because it is combined with electronic circuits and components.
• the implementation of the invention does not require the adhesive bead to be continuous.
• FIG. 16 a continuous strip of adhesive 10 is shown schematically, but in FIGS. 17 and 18, other solutions are shown.
• FIG. 17 illustrates an example according to which the strip of adhesive is formed by the juxtaposition of three narrow strips 10a, 10b and 10c.
• the strip is therefore discontinuous when considered in its width, but, on the other hand, each of these strips is continuous in the longitudinal direction.
• FIG. 18 illustrates an example according to which the strip of adhesive is constituted by the juxtaposition of points 10d_ arranged in longitudinal and transverse lines. They could also be arranged in longitudinal lines but offset, for example in staggered rows, in the transverse direction.
• the strip is therefore discontinuous both longitudinally and transversely.
• the total quantity of adhesive must remain substantially the same as that of a continuous strip 1, in order to obtain good fixing of the support on the destination surface.
• a discontinuous strip like the one in FIG. 17 or in FIG. 18 has a total width greater than that of a continuous strip 10 like that shown in FIG. 16.
• the adhesive set up in the factory before delivery to the customer, can be applied directly to the final product and is masked by the protective tape which can be of any color, including white, and attractive in appearance.
• the invention therefore applies well, not only to brown corrugated articles, but also to corrugated articles or other white material.
• the ribbon 15 which passes over the space 90 existing between the panels ⁇ and 20b is intact, that is to say that it is not cut.
• the tongue 15c is longer (practically double) than each of the tongues 15 and 15t ⁇ , which can facilitate the removal of the ribbon 15.
• the tongue 15c is longer (practically double) than each of the tongues 15 and 15t ⁇ , which can facilitate the removal of the ribbon 15.
• the two downstream edges 24 and upstream 25 of the panels 20d_ and 20e which delimit the space 93 which exists between the panels 20d_ and 20e_, there is a line in mixed lines respectively 96 and 97 which each indicate a straight section (transverse to the ribbon 15), which, repeated for each space, do not leave any tongue remaining but a fragment of ribbon 15d_ constituting a scrap to be eliminated.
• the finished panels 20 therefore have no tongue.
• This solution may be desired when the products thus obtained are intended to be subsequently shaped mechanically, since the presence of one or two tongues may be discouraged, or even prohibited, if they risk catching in moving mechanical parts, for example. example, and then disrupt the operation of machines.
• This production gain can more than offset the increase in the amount of ribbon consumed.
• the intensity of the bonding can be lowered, which allows the use of inexpensive tapes 15 and which makes it possible to remove this tape 15 more easily when using the adhesive strip 10.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Adhesive Tapes (AREA)
• Adhesives Or Adhesive Processes (AREA)
• Laminated Bodies (AREA)
• Package Frames And Binding Bands (AREA)

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• 1990
  • 1990-06-28 DE DE69024770T patent/DE69024770T2/de not_active Expired - Fee Related
  • 1990-06-28 US US07/656,177 patent/US5350477A/en not_active Expired - Lifetime
  • 1990-06-28 CA CA002035478A patent/CA2035478C/fr not_active Expired - Fee Related
  • 1990-06-28 AT AT90910777T patent/ATE132819T1/de not_active IP Right Cessation
  • 1990-06-28 EP EP90910777A patent/EP0431144B1/de not_active Expired - Lifetime
  • 1990-06-28 ES ES90910777T patent/ES2084700T3/es not_active Expired - Lifetime
  • 1990-06-28 WO PCT/FR1990/000482 patent/WO1991000216A1/fr active IP Right Grant
• 1993
  • 1993-08-31 US US08/114,085 patent/US5443678A/en not_active Expired - Lifetime

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