EP0009019A1 - Process and device for producing a packing, and the packing produced. - Google Patents

Process and device for producing a packing, and the packing produced.

Info

Publication number
EP0009019A1
EP0009019A1 EP79900016A EP79900016A EP0009019A1 EP 0009019 A1 EP0009019 A1 EP 0009019A1 EP 79900016 A EP79900016 A EP 79900016A EP 79900016 A EP79900016 A EP 79900016A EP 0009019 A1 EP0009019 A1 EP 0009019A1
Authority
EP
European Patent Office
Prior art keywords
walls
edges
packaging
film
base
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP79900016A
Other languages
German (de)
French (fr)
Other versions
EP0009019B1 (en
Inventor
Guy Albert Chazal
Jean Augustin Bodet
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.)
PARISIENNE IMPRESSION
Original Assignee
PARISIENNE IMPRESSION
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 PARISIENNE IMPRESSION filed Critical PARISIENNE IMPRESSION
Publication of EP0009019A1 publication Critical patent/EP0009019A1/en
Application granted granted Critical
Publication of EP0009019B1 publication Critical patent/EP0009019B1/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B31B50/59—Shaping sheet material under pressure
    • 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
    • B31B2105/00—Rigid or semi-rigid containers made by assembling separate sheets, blanks or webs
    • 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
    • B31B2120/00—Construction of rigid or semi-rigid containers
    • B31B2120/40—Construction of rigid or semi-rigid containers lined or internally reinforced
    • B31B2120/402—Construction of rigid or semi-rigid containers lined or internally reinforced by applying a liner to already made boxes, e.g. opening or distending of the liner or the box
    • B31B2120/404—Construction of rigid or semi-rigid containers lined or internally reinforced by applying a liner to already made boxes, e.g. opening or distending of the liner or the box using vacuum or pressure means to force the liner against the wall
    • 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
    • B31B2120/00—Construction of rigid or semi-rigid containers
    • B31B2120/40—Construction of rigid or semi-rigid containers lined or internally reinforced
    • B31B2120/402—Construction of rigid or semi-rigid containers lined or internally reinforced by applying a liner to already made boxes, e.g. opening or distending of the liner or the box
    • B31B2120/406—Construction of rigid or semi-rigid containers lined or internally reinforced by applying a liner to already made boxes, e.g. opening or distending of the liner or the box the lining material being a plunger, a web, a sheet or a bag to be forced into the box, e.g. by using heat

Definitions

  • the packaging comprises at least two compartments separated by two walls placed face to face. These two walls may further include at least one rim located at their top, whereby the cover can be fixed both on the rims of the periphery of the packaging and on the rim of the intermediate walls which separate the two. compartments.
  • This packaging is essentially el lement. made up of a cardboard part and a thermo-formed plastic part, the manufacturing of the packaging involves two essential phases:
  • thermoforming and bonding of a thermo-plastic film
  • a packaging of this type finds its real economic interest only if it is obtained by industrial methods. However, if it is easy to obtain a cardboard packaging from a cut and creased blank, then to coat it by thermo-forming a thermo-plastic film, it is however much more difficult to 'Obtain the folding of the edges which, by definition, are in a plane different from that of the walls.
  • the subject of the invention is essentially a process by which the edges of a tray can be folded down.
  • FIGS. 8, 9 and 10 The edge visible in FIGS. 8, 9 and 10 is formed exclusively by the sheet of synthetic material and not by cardboard edges.
  • the French patent 73/45770 but it does not teach how one can fold in an automatic manner, during the establishment of an oplastic thejr sheet, peripheral edges forming a continuous trot ⁇ roof. It is indicated on lines 33 to 38 on page 4, without further explanation, that these edges must be folded, but no means is described to achieve this result.
  • the synthetic material must be placed before shaping in a mold as this results from the plural in the verb to become page 6, line 1 as well as page 7, lines 8 to 15.
  • the tongues 13, 15, 17 and 19 are necessarily outside the walls 12, 14, 16 and 18 so that one does not can transform the blank into a tray by simply conforming it in the female matrix of a mold because it would be necessary to review, in the angles of this matrix, a sufficient space to allow the tongues 13, 1-5 , 17 and 19 to fold against the outer face of the corresponding wall.
  • Figure 1 is a plan view of a cardboard blank cut and creased to form a package conforming to 1 * in vention.
  • FIGS. 2 to 4 are schematic sectional views of a device according to the invention.
  • FIG. 5 is a view of a package obtained from a blank of FIG. 1 and by means of the device of FIGS. 2 to 4.
  • Figures 6 to 8 are plan views of blanks of as ⁇ tone cut and creased to form a package with three compartments, in accordance with the invention.
  • Figure 9 is a schematic perspective view of a specific base for obtaining a package with three compartments, according to the invention.
  • Figures 10 to 12 are schematic views showing obtaining a package with three compartments from the blanks of Figures 6 to 8.
  • Figure 13 is a schematic view of such a package showing the folding of the edges according to the method coji form 1 inventi on.
  • Figure 14 is a perspective view of the same finished packaging.
  • Figures 15 and 16 are schematic partial views showing them two alternative embodiments of a device according to the invention.
  • Figures 17, 18 and 19 show schematically according to three different phases, another variant of a device according to the invention.
  • Figure 20 schematically shows the application of this variant to the production of a packaging of the type shown in Figures 6 to 14, that is to say having to have several separate compartments.
  • the blank shown in FIG. 1 is taken flat from a stack of identical blanks superimposed and is then placed opposite a shaping device whose opening is similar to the shape and dimensions of the bottom 1 plus the thickness of the cardboard which constitutes the kings 3 to 6.
  • a shaping device whose opening is similar to the shape and dimensions of the bottom 1 plus the thickness of the cardboard which constitutes the kings 3 to 6.
  • the pyramid trunk mentioned above is obtained, which means that the edges 7 to 10 remain in the extension of each corresponding wall.
  • the blank thus shaped is kept in volume in a cell 12 of a base 13.
  • the base 13 is part of a thermoforming device which also comprises a plate 14 equipped with heating means (not shown) , a compressed air injection nozzle 15 as is known per se
  • a frame 16 which surrounds the alv ⁇ o le 12 and whose height is a little greater than the width gor of ledges 7 to 10 which, as said above, remain in the extension of the walls 3 to 6, therefore emerge from the alveolus 12.
  • the frame 16 has an upper groove 17 with which a seal 18 provided on the plate 14 must cooperate.
  • the plate 14 is mounted so as to be movable so that it can be brought into position d 'erasing to allow the introduction of a cardboard blank into the cell 12.
  • a thermo-plastic film 19 is placed above the base 13, the dimpled 12 and the frame 16.
  • the plate 14 is then folded down (Fig.2) When the plate 14 is firmly applied, the seal 18 penetrates into the groove 17 of the frame 16, trapping the film 19.
  • the pressure and vacuum are reversed to obtain the evacuation by the conduits 20 of the air which was trapped in the chamber delimited by the cell 12, the plate 14 and the interior of the frame 16. Thanks to the fact that the walls 3 to 6 of the package are only contiguous, the air can easily pass through the interstices between these walls, and evacuate through the conduits 20.
  • Compressed air then arrives via nozzle 15 which flows schematically according to the arrows FI (fig. 3), that is to say substantially from the center of the chamber.
  • the film 19, maintained at the right of the frame 16, and ra- molie by the heating means, is deformed and Abais ⁇ toward the bottom 1 starting with the area, and that, thanks to the fact that the occluded air between its underside and the cardboard blank is sucked through the conduits 20.
  • the film 19 therefore passes through a deformation phase shown schematically in FIG. 3 where we see that it tends to tilt towards the base 13 towards the outside if we consider the cardboard blank.
  • the film 19 under the effect of compressed air causes the edges 7 to 10 to be folded outwards, and this, until they are perfectly applied against the horizontal face of the base 13 which surrounds the cell 12.
  • the upper face of the base 13 it is therefore necessary for the upper face of the base 13 to extend around the cell 12 over a distance at least equal to the height of the edges 7 10 when the blank is placed in said cell 12, so that these edges can be, without discomfort, applied flat on the base 13.
  • the film 19 intimately follows the bottom 1, the walls 3 to 6, the ledges 7 to 10, and optionally, the upper face of the plate situated between the edge of the edges and the inner face of the frame 16 as shown in FIG. 4.
  • the film is glued to the cardboard and ensures the connection of the walls and edges by sealing off all the interstices.
  • the plate 14 is then placed in the erasing position, the film 19 is cut flush with the edges 7 to 10, and the finished packaging is removed.
  • FIGS. 6 to 14 sees that a package obtained according to the process according to the invention may have several separate compartments.
  • the packaging shown comprises three compartments and such packaging is obtained from three different cardboard blanks as will now be described.
  • FIG. 6 there is shown a cut cardboard blank and grooved to provide a 30 separate background by score lines 31 of walls 32, 33, 34 and 35, said walls co pre ⁇ ing each a respective flange 36, 37, 38 and 39 delimited by creasing lines 40.
  • This blank is intended to constitute the large compartment A visible very particularly in FIGS. 13 and 14.
  • FIG. 7 we can see a blank of cardboard cut and creased to form a bottom 41 separated by creasing lines 42 of walls 43, 44, 45 and 46.
  • the walls 43 and 46 each include a flange respectively 47 and 48, delimited by fold lines 49.
  • This blank is intended to constitute the compartment B visi ⁇ ble in particular in Figures 13 and 14.
  • FIGS. 6 we see a blank of cardboard cut and rai ⁇ born to present a bottom 50 separated by creasing lines 51 of walls 52, 53, 54 and 55.
  • the walls 52, 54 and 55 each have a rim 56, 57 and 58 respectively delimited by creasing lines 59.
  • This blank is intended to create the compartment C more particularly visible in FIGS. 13 and 14.
  • the method and the device for obtaining a complete packaging from the blanks of FIGS. 6, 7 and 8 are all -comparably comparable to those which have been previously described with reference to FIGS. 1 to 5.
  • the base 60 then comprises three cells 61, 62 and 63 in which are placed, after straightening the walls with respect to the bottom, the blanks of FIGS. 6 to 8.
  • the blank of FIG. 6 is placed in the cell 61
  • the blank of FIG. 7 is placed in the ⁇ vial 62
  • the blank of FIG. 8 is placed in alveoli 63.
  • thermo-plastic film 64 is placed above the base 60, that is to say above the three cells at the same time, while the different edges of the cardboard blanks are still in the extension of their corresponding wall (fig. 10).
  • the plate 65 associated with the base 60 and which corresponds to the plate 14, comprises three nozzles each opening at right angles to the center of the three cells 61 to 63. In FIGS. 11 and 12, only two nozzles 66 and 67 are seen.
  • the walls 4 45 and 53 do not have edges. Indeed, this corresponds to an embodiment according to which the two walls located opposite one another and which separate two neighboring compartments are separated at their top by the distance corresponding to the width of a single rim .
  • compartment A is separated from co-compartments B and C by the walls 35 on the one hand and 44 e 53 on the other hand. These end on a straight edge while the wall 35 has a rim 39, the area of which you will be substantially contiguous with the free edge of walls 44 and 53.
  • the compartments B and C are separated by walls 45 and 52.
  • the wall 45 has no flange and t 'ermine to freeboard whereas the wall 52 has the flange 56 whose edge will substantially join ⁇ tive with the straight edge of the wall 45. It is to ensure continuity in the same plane, without superimposition, that the edges 39, 56, 48 and 58 have variously cut edges.
  • edges 39 and 56 are done in the same way as for the peripheral edges because, as can be seen in FIG. 10, the walls which separate two neighboring compartments form an angle c ⁇ with respect to the bottom, thanks to which the edge corresponding to a natural tendency to tilt in the desired direction when it su ⁇ bit the push of the film 64.
  • the packaging can then be closed off by means of a sealed cover on all the edges at the same time so that the compartments A, B and C are separated in a watertight manner and can contain different products, whether they are solid, liquid, pasty or powdery without there being any mixture between them.
  • the underside of the plate is provided with additional elements which must come into contact with at least one of the edges of the ⁇ mbal- when the plate is lowered to cause or, at least, favor the folding of said flange.
  • this element is formed by a relief 70, which constitutes a ramp located near an edge of the desired cell of the base so that at the moment when the the plate is lowered, the thermo-plastic film tends to tilt the rim and this inclination is amplified in the desired direction thanks to the ramp 70 which pushes the rim and, in any case, radically opposes the folding of this rim in the opposite direction to that desired.
  • a relief 70 which constitutes a ramp located near an edge of the desired cell of the base so that at the moment when the the plate is lowered, the thermo-plastic film tends to tilt the rim and this inclination is amplified in the desired direction thanks to the ramp 70 which pushes the rim and, in any case, radically opposes the folding of this rim in the opposite direction to that desired.
  • the ramp 70 must end with an edge that is as light as possible so as not to risk tearing the thermo-plastic film and must occupy a very precise position to extend inside the corresponding cell. laying and not on the top of the package.
  • the plate does not include a relief but on the contrary a hollow 71 also in the form of a ramp and the purpose of which is the same as that of the relief 70.
  • the curve of the ramp is inclined to obtain the flap of the flange in the desired direction and to avoid any jamming.
  • This variant has the advantage of avoiding any risk of tearing of the thermoplastic film.
  • the principle is used of providing an additional element on the plate to facilitate, even provoke the folding of the flanges
  • the plate 75 provided with a seal 76, must cooperate directly with the base 77, that is to say without an intermediate frame 16.
  • a perforated dome 78 is provided of holes 79 (or porous) and the outline of which can correspond sensiblemen to the shape of the concavity of the packaging.
  • the curvature of the dome 78 allows the film 19 to be deformed without damage from the center and, thus, to tilt the edges of the packaging in the desired direction (fig.18).
  • the compressed air is sent inside the dome 78 according to arrow F 3 and it passes through the dome 78 through the holes 79 (or through the passages of its porous wall, or by the openings of a grid which constitutes it) and is distributed according to the arrows F 4 (FIG. 19). In this way, the film 19 is perfectly applied and glued, over the entire interior of the package and on its edges.
  • FIG. 20 it has been shown that it is possible to provide as many domes as there are compartments.
  • a cupola 80 which corresponds to compartment A
  • a cupola 81 which corresponds to compartment B of the packaging of FIGS. 6 to 14.
  • a third cupola (not shown) corresponds to compartment C.
  • none of the walls have a rim so that at their summits they are then substantially contiguous.
  • two facing walls can be substantially parallel, that is to say that the angle (X in FIG. 10 is practically straight. It is very particularly in this case that the additional element of the plate ( ramp or dome) is useful for giving the rim the correct direction of drawdown and, this in the event that, obviously, such a rim is provided.

Landscapes

  • Cartons (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Emballage comprenant une partie en carton et une partie en matiere synthetique. La partie en carton est composee d'un fond (1), de parois laterales (3) et (6) et de rebords (7) a (10) prolongeant chacun une paroi. Cette partie en carton recoit une feuille en matiere synthetique (19) par thermo-formage dans un moule. Un cadre (16) est interpose entre l'embase (13) et la platine (14). De l'air comprime est introduit selon les fleches (F1) et apres chauffage de la pellicule (19), de sorte que celle-ci commence par se deformer au centre et rabat les rebords (7) a (10) contre le dessus de l'embase (13). On obtient ainsi, simultanement, le rabattement des rebords a l'horizontal, le collage de toutes les parois et la doublure de toute la partie en carton par la pellicule (19). Emballage de tous produits y compris humides tels que des matieres alimentaires. Un couvercle peut etre scelle sur l'emballage, ce dernier pouvant alors etre utilise pour la surgelation, la pasteurisation et autres operations.Packaging comprising a cardboard part and a synthetic part. The cardboard part is composed of a bottom (1), side walls (3) and (6) and flanges (7) to (10) each extending a wall. This cardboard part receives a sheet of synthetic material (19) by thermoforming in a mold. A frame (16) is interposed between the base (13) and the plate (14). Compressed air is introduced according to the arrows (F1) and after heating the film (19), so that it begins to deform in the center and folds the edges (7) to (10) against the top of the base (13). There is thus obtained simultaneously the folding of the edges to the horizontal, the bonding of all the walls and the lining of the entire cardboard part by the film (19). Packaging of all products including wet ones such as food materials. A lid can be sealed on the packaging, which can then be used for freezing, pasteurization and other operations.

Description

Procédé et dispositif pour l'obtention d'un emballage ainsi que l' emballage ainsi obtenu.Method and device for obtaining a packaging as well as the packaging thus obtained.
On a décrit dans la demande internationale PCT/F 78/00027 du 2 Octobre 1978 un emballage en carton revê¬ tu d'une pellicule de matière synthétique, celle-ci as¬ surant par collage, la liaison entre carton et pellicule Cet emballage est essentiellement caractérisé par le fait qu'il comprend des rebords qui sont tous situés dans le même plan, sans aucune superposition, de telle sorte que l 'on peut fermer cet emballage au moyen d'un couvercle fixé d'une manière étanche sur ces rebords. Selon une variante, l 'emballage comprend au moins deux compartiments séparés par deux parois placées face à face. Ces deux parois peuvent en outre, comprendre au moins un rebord situé à leur sommet, grâce à quoi le couvercle peut être fixé à la fois sur les rebords du pourtour de l 'emballage et sur le rebord des parois in¬ termédiaires qui séparent les deux compartiments. Cet emballage étant essenti el lement. consti tué d'une par¬ tie en carton et d'une partie en matière synthétique thermo-formée, la fabrication de l 'emballage suppose deux phases essentielles :We have described in international application PCT / F 78/00027 of October 2, 1978 a cardboard packaging coated with a film of synthetic material, the latter ensuring by bonding, the connection between cardboard and film This packaging is essentially characterized by the fact that it comprises flanges which are all situated in the same plane, without any overlap, so that this packaging can be closed by means of a lid fixed in a sealed manner on these flanges . According to a variant, the packaging comprises at least two compartments separated by two walls placed face to face. These two walls may further include at least one rim located at their top, whereby the cover can be fixed both on the rims of the periphery of the packaging and on the rim of the intermediate walls which separate the two. compartments. This packaging is essentially el lement. made up of a cardboard part and a thermo-formed plastic part, the manufacturing of the packaging involves two essential phases:
- mise en forme du flan de carton,- shaping of the cardboard blank,
- thermo-formage et collage d'une pellicule thermo-plas¬ tique .- thermoforming and bonding of a thermo-plastic film.
Un emballage de ce type ne trouve son intérêt économique réel que s'il est obtenu par des méthodes industrielles. Or, s'il est facile d'obtenir un emballage en carton à partir d'un flan découpé et rainé, puis de le revêtir par thermo¬ formage d'une pellicule thermo-plastique, il est en re¬ vanche beaucoup plus difficile d'obtenir le rabattement des rebords qui , par définition, sont dans un plan dif¬ férent de celui des parois.A packaging of this type finds its real economic interest only if it is obtained by industrial methods. However, if it is easy to obtain a cardboard packaging from a cut and creased blank, then to coat it by thermo-forming a thermo-plastic film, it is however much more difficult to 'Obtain the folding of the edges which, by definition, are in a plane different from that of the walls.
C'est la raison pour laquelle on s'est contenté jusqu'à ce jour de barquettes simples, c'est-à-dire sans rebords ou de barquettes à rebords, mais ces derniers n'étant constitués que de matière synthétique, ainsi que cela est expliqué dans la demande de brevet évoquée plus haut. Par ailleurs, on connait le brevet allemand 1.479.017 qui concerne un procédé pour la mise en place d'une feuille thermoplastique à l 'intérieur d'une barquette en carton mais il s'agit d'un procédé bien connu dans sa généralité-. Ici , il s'agit d'un perfectionnement es¬ sentiellement caractérisé par le fait que la matrice 15 est plus profonde que l 'emballage 10 de sorte qu'il sub siste sous cet emballage 10 un espace par lequel est év eue l 'air qui se trouve occlus entre l 'emballage et la matrice 15.This is why we have been content to date with simple trays, that is to say without rims or rim trays, but the latter being made only of synthetic material, as well as this is explained in the patent application mentioned above. Furthermore, we know the German patent 1,479,017 which relates to a process for the installation of a thermoplastic sheet inside a cardboard tray but it is a process well known in its generality - . Here, it is an improvement es¬ essentially characterized by the fact that the matrix 15 is deeper than the packaging 10 so that it subsists under this packaging 10 a space through which the air is vented. which is occluded between the packaging and the matrix 15.
Ceci est possible du fait que la feuille de matière syn thétique 20 emprisonnée entre deux pièces 18 et 19 est bloquée contre une couronne périphérique 21 ainsi que cela est particulièrement visible sur la figure 6. On constate à l 'examen de ce brevet que le procédé mis en oeuvre est diamétralement opposé à celui dont il est question ici .This is possible because the sheet of synthetic material 20 trapped between two parts 18 and 19 is blocked against a peripheral crown 21 as is particularly visible in FIG. 6. It can be seen on examination of this patent that the process implemented is diametrically opposite to that discussed here.
En effet, l 'invention a essentiellement pour objet un procédé grâce auquel on peut rabattre les rebords d'une barquette.In fact, the subject of the invention is essentially a process by which the edges of a tray can be folded down.
Selon ce procédé, il faut laisser subsister, au-dessus du moule ou matrice, un espace périphérique sur lequel des rebords pourront être rabattus et, cela, grâce à la matière synthétique elle-même du fait que celle-ci com- mence à se déformer vers le bas par. le centre pour ter¬ miner par la périphérie, ce qui se traduit par un effet de renversement des bords dirigé de l'intérieur vers l 'extérieur, comme cela se voit particulièrement sur la figure 3 de la présente demande. Selon le brevet allemand 1.479.017 un tel fonctionne¬ ment serait impossible même si l'on essayait délibéré¬ ment d'utiliser le procédé de la présente demande. Il suffit, en effet, d'observer la figure 6 du brevet allemand 1.479.017 pour voir que la feuille de matière synthétique 20 est encore à 1 'état tendu et donc ni ra¬ mollie ni sollicitée par une pression d'air alors que la partie 18 est déjà dans sa position la plus basse qui correspond au pincement de la feuille 20 entre cette par tie 18 et la partie21. Or, il est précisé dans ce brevet (colonne 3, lignes 11 à 14) qu'il doit y avoir un très petit espace entre le bord intérieur de la pièce 18 et la partie extérieure de la paroi verticale de la bar¬ quette 10. On voit, en effet, sur la figure 6 que ce très petit espace est celui qui est juste nécessaire pour laisser passage à la feui lie thermoplastique 20, ce qui assure une obstruction étanche de la partie supérieii re de l 'ensemble et ce qui permet d'aspirer l 'air occlus entre la barquette et le moule.According to this process, a peripheral space must be left above the mold or matrix on which the flanges can be folded down, and this, thanks to the synthetic material itself because it begins to distort down by. the center to finish by the periphery, which results in an inversion of the edges directed from the inside to the outside, as can be seen in particular in FIG. 3 of the present application. According to German patent 1,479,017, such a functioning would be impossible even if one deliberately tried to use the method of the present application. It suffices, in fact, to observe FIG. 6 of the German patent 1,479,017 to see that the sheet of synthetic material 20 is still in the stretched state and therefore neither softened nor stressed by an air pressure while the part 18 is already in its lowest position which corresponds to the pinching of the sheet 20 between this part 18 and the part 21. However, it is specified in this patent (column 3, lines 11 to 14) that there must be a very small space between the inner edge of the part 18 and the outer part of the vertical wall of the bar 10. It can be seen, in fact, in FIG. 6 that this very small space is that which is just necessary to allow passage to the thermoplastic sheet 20, which ensures a tight obstruction of the upper part of the assembly and which allows suck the air trapped between the tray and the mold.
On connait également le brevet américain 3.547.722 qui décrit un emballage ne comportant pas de rebord en car¬ ton, de sorte qu'il ne saurait apprendre à personne corn-" ment de tels rebords en carton peuvent être rabattus vers 1 ' extérieur.Also known is US Patent 3,547,722 which describes a package having no rim car¬ tone, so he can not learn to corn- person "such lies cardboard edges can be folded to one outside.
Le rebord visible sur les figures 8, 9 et 10 est cons¬ titué exclusivement par la feuille de matière synthéti¬ que et non par des bords en carton. On connait aussi le brevet français 73/45770 mais celui- ci n'apprend pas comment on peut replier d'une manière automatique, lors de la mise en place d'une feuille thejr oplastique, des rebords périphériques formant un trot¬ toir continu. II est indiqué lignes 33 à 38 de la page 4, sans autre expl ication, que ces rebords doivent être plies mais il n'est décrit aucun moyen pour parvenir à ce résultat. On voit également que la matière synthétique doit être placée avant la mise en forme dans un moule comme cela résulte du pluriel dans le verbe devenir page 6, ligne 1 ainsi que page 7, lignes 8 à 15.The edge visible in FIGS. 8, 9 and 10 is formed exclusively by the sheet of synthetic material and not by cardboard edges. We also know the French patent 73/45770 but it does not teach how one can fold in an automatic manner, during the establishment of an oplastic thejr sheet, peripheral edges forming a continuous trot¬ roof. It is indicated on lines 33 to 38 on page 4, without further explanation, that these edges must be folded, but no means is described to achieve this result. We also see that the synthetic material must be placed before shaping in a mold as this results from the plural in the verb to become page 6, line 1 as well as page 7, lines 8 to 15.
En tout état de cause, il est clair que les languettes 13, 15, 17 et 19 se trouvent obligatoirement à l'exté¬ rieur des parois 12, 14, 16 et 18 de sorte que l 'on ne saurait transformer le flan en barquette en le confor¬ mant simplement dans la matrice femelle d'un moule car il serait nécessaire de révoir, dans les angles de cet¬ te matrice, un espace suffisant pour permettre aux lan- guettes 13, 1-5, 17 et 19 de se replier contre la face extérieure de la paroi correspondante.In any event, it is clear that the tongues 13, 15, 17 and 19 are necessarily outside the walls 12, 14, 16 and 18 so that one does not can transform the blank into a tray by simply conforming it in the female matrix of a mold because it would be necessary to review, in the angles of this matrix, a sufficient space to allow the tongues 13, 1-5 , 17 and 19 to fold against the outer face of the corresponding wall.
Le passage de ce brevet que l 'on trouve page 6 à parti de la ligne 18, fait état de mise en forme et de trans¬ formation en récipient ou barquette du flan mais rien ne permet de deviner par quel procédé cette transforma¬ tion ou mise en forme est opérée. On remarque, par exe pie, lignes 24 et 25, que le rédacteur du brevet fait une différence entre le temps nécessaire au repliage des languettes d'angle et la vitesse de formage puisqu entre les deux membres de phrase faisant allusion à ces opérations se trouvent les mots "ainsi que". Il résulte de cette analyse que le brevet français 73/45770 constitue une antériorité de principe à toutes les barquettes comprenant un rebord continu mais ne pe pas être considéré comme une antériorité à la présente invention du fait que la matière synthétique doit êtr placée avant la conformation du flan de carton et qu'il n'est précisé nulle part que les rebords sont rabattus vers l 'extérieur lors de l'opération de thermo-formage et au moyen de la pellicule thermoplastique elle-même. La présente invention concerne un procédé et un disposi¬ tif grâce auquel on peut obtenir de manière industriell un emballage avec ou sans compartiments séparés, mais muni de rebords, grâce à des moyens entièrement origi- naux.The passage of this patent which can be found on page 6 starting from line 18, describes the shaping and transformation into a container or tray of the blank, but nothing allows us to guess by which process this transformation or shaping is performed. Note, for example, lines 24 and 25, that the patent writer makes a difference between the time required to fold the corner tabs and the forming speed since between the two phrases referring to these operations are the words "as well as". It follows from this analysis that the French patent 73/45770 constitutes anteriority in principle to all the trays comprising a continuous rim but cannot be considered as anteriority to the present invention since the synthetic material must be placed before conformation of the cardboard blank and it is nowhere specified that the edges are folded outwards during the thermoforming operation and by means of the thermoplastic film itself. The present invention relates to a method and a disposi¬ tif by which one can obtain industrially a package with or without separate compartments, but provided with flanges, using entirely original means.
L'invention sera bien comprise à l'aide de la descrip¬ tion détaillée ci-après faite en référence au dessin a nexé. Bien entendu, la description et le dessin ne son donnés qu'à titre d'exemple indicatif et non limitatif. La figure 1 est une vue en plan d'un flan de carton dé¬ coupé et rainé pour former un emballage conforme à 1 *i n vention .The invention will be better understood using the detailed descrip¬ tion below made with reference to the attached drawing. Of course, the description and the drawing are given only by way of an indicative and nonlimiting example. Figure 1 is a plan view of a cardboard blank cut and creased to form a package conforming to 1 * in vention.
Les figures 2 à 4 sont des vues schématiques en coupe d'un dispositif conforme à l'invention. La figure 5 est une vue d'un emballage obtenu à partir d'un flan de la figure 1 et au moyen du dispositif des figures 2 à 4.Figures 2 to 4 are schematic sectional views of a device according to the invention. FIG. 5 is a view of a package obtained from a blank of FIG. 1 and by means of the device of FIGS. 2 to 4.
Les figures 6 à 8 sont des vues en plan de flans de car^ ton découpés et rainés pour former un emballage à trois compartiments, conforme à l 'invention.Figures 6 to 8 are plan views of blanks of as ^ tone cut and creased to form a package with three compartments, in accordance with the invention.
La figure 9 est une vue schématique en perspective d'une embase spécifique pour l 'obtention d'un emballage à trois compartiments, conforme à l 'invention.Figure 9 is a schematic perspective view of a specific base for obtaining a package with three compartments, according to the invention.
Les figures 10 à 12 sont des vues schématiques montrant l 'obtention d'un emballage à trois compartiments à par¬ tir des flans des figures 6 à 8.Figures 10 to 12 are schematic views showing obtaining a package with three compartments from the blanks of Figures 6 to 8.
La figure 13 est une vue schématique d'un tel emballage montrant le rabattement des rebords selon le procédé coji forme à 1 ' inventi on .Figure 13 is a schematic view of such a package showing the folding of the edges according to the method coji form 1 inventi on.
La figure 14 est une vue en perspective de ce même embaj_ lage terminé.Figure 14 is a perspective view of the same finished packaging.
Les figures 15 et 16 sont des vues schématiques partiel¬ les montrant deux variantes de réalisation d'un disposi¬ tif conforme à l 'invention.Figures 15 and 16 are schematic partial views showing them two alternative embodiments of a device according to the invention.
Les figures 17, 18 et 19 représentent schêmatiquement selon trois phases différentes, une autre variante d'un dispositif conforme à l 'invention.Figures 17, 18 and 19 show schematically according to three different phases, another variant of a device according to the invention.
La figure 20 montre schêmatiquement l 'application de cette variante à le réalisation d'un emballage du type de celui représenté aux figures 6 à 14, c'est-à-dire devant comporter plusieurs compartiments séparés. On va maintenant décrire en regard des figures 1 à 5 un emballage, le dispositif et le procédé conformes à l 'ini venti on .Figure 20 schematically shows the application of this variant to the production of a packaging of the type shown in Figures 6 to 14, that is to say having to have several separate compartments. We will now describe, with reference to FIGS. 1 to 5, a package, the device and the method in accordance with the invention.
En vue d'obtenir un emballage constitué d'une barquette simple, c'est-à-dire à un seul compartiment, de forme générale en tronc de pyramide creux, on part d'un flan de carton découpé et rainé comme on le voit sur la figu re 1 de telle manière que ce flan, à plat, présente un fond 1 délimité par des lignes de rainage 2, quatre pa¬ rois respectivement 3, 4, 5 et 6. ainsi que quatre re- bords respectivement 7, 8, 9 et 10 délimités par des li nés de rainage 11. Il est facile de comprendre que si l'on redresse les parois 3, 4, 5 et 6 par rapport au fond 1, le long des lignes 2, on obtient une barquette en tronc de pyramide. On comprend également que le flan de carton ainsi plié peut facilement être obtenu au mo¬ yen d'un conformateur puisque rien ne s'oppose à son pa sage le long des arêtes ou parois d'un tel conformateur. On voit également qu'en revanche, il serait impossible par des moyens simples d'obtenir au moyen d'un conforma teur automatique le rabattement des rebords 7, 8, 9, et 10 le long des lignes* 11, vers l 'extérieur car alors ce rebords seraient sensiblement perpendiculaires aux bord du conformateur.In order to obtain a package consisting of a simple tray, that is to say with a single compartment, generally in the form of a hollow pyramid trunk, we start from a blank of cardboard cut and grooved as seen on the fig 1 re such that this blank, flat, has a bottom 1 delimited by creasing lines 2, four pa¬ kings 3, 4, 5 and 6. respectively that four edges respectively 7, 8, 9 and 10 delimited by crease lines 11. It is easy to understand that if the walls 3, 4, 5 and 6 are straightened with respect to the bottom 1, along lines 2, we get a tray in the trunk of a pyramid. It is also understood that the blank of cardboard thus folded can easily be obtained by means of a shaper since nothing stands in the way of its passage along the edges or walls of such a shaper. It can also be seen that, on the other hand, it would be impossible by simple means to obtain, by means of an automatic conformator, the folding of the edges 7, 8, 9, and 10 along the lines * 11, towards the outside because then this edges would be substantially perpendicular to the edge of the shaper.
Selon l'invention le flan représenté sur la figure 1 es prélevé à plat sur une pile de flans identiques superpo sés puis est disposé en regard d'un conformateur dont l 'ouverture est analogue à la forme et aux dimensions d fond 1 plus l 'épaisseur du carton qui constitue les pa¬ rois 3 à 6. Ce faisant, on obtient le tronc de pyramide évoqué plus haut ce qui signifie que les rebords 7 à 10 restent dan le prolongement de chaque paroi correspondante. Le flan ainsi conformé est maintenu en volume dans un alvéole 12 d'une embase 13. L'embase 13 fait partie d'un dispositif de thermo-forma ge qui comprend par ailleurs, une platine 14 équipée de moyens de chauffage (non représentés), d'une buse d'in¬ jection d'air comprimé 15 ainsi que cela est connu en soi Sur l'embase 13 est fixé un cadre 16 qui entoure l 'alvëo le 12 et dont la hauteur est un peu supérieure à la lar geur des rebords 7 à 10 qui , comme on le dit plus haut, restent dans le prolongement des parois 3 à 6, donc émergent de l 'alvéole 12.According to the invention the blank shown in FIG. 1 is taken flat from a stack of identical blanks superimposed and is then placed opposite a shaping device whose opening is similar to the shape and dimensions of the bottom 1 plus the thickness of the cardboard which constitutes the kings 3 to 6. In so doing, the pyramid trunk mentioned above is obtained, which means that the edges 7 to 10 remain in the extension of each corresponding wall. The blank thus shaped is kept in volume in a cell 12 of a base 13. The base 13 is part of a thermoforming device which also comprises a plate 14 equipped with heating means (not shown) , a compressed air injection nozzle 15 as is known per se On the base 13 is fixed a frame 16 which surrounds the alvëo le 12 and whose height is a little greater than the width gor of ledges 7 to 10 which, as said above, remain in the extension of the walls 3 to 6, therefore emerge from the alveolus 12.
Le cadre 16 présente une gorge supérieure 17 avec la¬ quelle doit coopérer un joint 18 prévu sur la platine 14. Comme cela est connu en soi , la platine 14 est montée de manière mobile de telle sorte qu'elle puisse être mise en position d'effacement pour permettre l 'introduction d'un flan de carton dans l 'alvéole 12. Lorsqu'elle est encore dans cette position d'effacement, on place une pellicule thermo-plastique 19 au dessus de l 'embase 13, de l 'alvé le 12 et du cadre 16. On rabat alors la platine 14 (Fig.2) Lorsque la platine 14 est fermement appliquée, le joint 18 pénétre dans la gorge 17 du cadre 16 en emprisonnant la pellicule 19. A ce moment on introduit de l 'air com¬ primé par des conduits 20 prévus dans l 'embase 13 tandis que, simultanément, on provoque une aspiration par la buse 15 de telle sorte que la pellicule 19 est intime¬ ment appliquée contre la platine 14 et les moyens de chauffage dont elle est munie. On obtient ainsi un ra- molissement de la pellicule 19 parfaitement réparti sur toute la surface. Quand cela est obtenu on inverse pres¬ sion et dépression pour obtenir l 'évacuation par les con¬ duits 20 de l 'air qui était emprisonné dans la chambre délimitée par l 'alvéole 12, la platine 14 et l 'intérieur du cadre 16. Grâce au fait que les parois 3 à 6 de l 'em- hallage sont seulement jointives, l 'air peut facilement passer par les interstices entre ces parois, et s'éva¬ cuer par les conduits 20.The frame 16 has an upper groove 17 with which a seal 18 provided on the plate 14 must cooperate. As is known per se, the plate 14 is mounted so as to be movable so that it can be brought into position d 'erasing to allow the introduction of a cardboard blank into the cell 12. When it is still in this erasing position, a thermo-plastic film 19 is placed above the base 13, the dimpled 12 and the frame 16. The plate 14 is then folded down (Fig.2) When the plate 14 is firmly applied, the seal 18 penetrates into the groove 17 of the frame 16, trapping the film 19. At this time, the air com¬ primed by conduits 20 provided in the base 13 while, simultaneously, an aspiration is caused by the nozzle 15 so that the film 19 is intimately applied against the plate 14 and the heating means with which it is provided. There is thus obtained a softening of the film 19 perfectly distributed over the entire surface. When this is obtained, the pressure and vacuum are reversed to obtain the evacuation by the conduits 20 of the air which was trapped in the chamber delimited by the cell 12, the plate 14 and the interior of the frame 16. Thanks to the fact that the walls 3 to 6 of the package are only contiguous, the air can easily pass through the interstices between these walls, and evacuate through the conduits 20.
Par la buse 15 arrive alors de l'air comprimé qui s'é¬ coule schêmatiquement selon les flèches FI (fig. 3) c'est à-dire sensiblement à partir du centre de la chambre. La pellicule 19, maintenue au droit du cadre 16, et ra- molie par les moyens de chauffage, se déforme et s'abais^ se vers le fond 1 en commençant par le centre, et cela, grâce au fait que l 'air occlus entre sa face inférieure et le flan de carton est aspiré par les conduits 20.Compressed air then arrives via nozzle 15 which flows schematically according to the arrows FI (fig. 3), that is to say substantially from the center of the chamber. The film 19, maintained at the right of the frame 16, and ra- molie by the heating means, is deformed and Abais ^ toward the bottom 1 starting with the area, and that, thanks to the fact that the occluded air between its underside and the cardboard blank is sucked through the conduits 20.
La pellicule 19 passe donc par une phase de déformation représentée schêmatiquement sur la figure 3 où l'on voit qu'elle tend à s'incliner en direction de l'embase 13 vers l 'extérieur si l'on considère le flan de carton. Ainsi la pellicule 19 sous l'effet de l 'air comprimé provoque le pliage vers l 'extérieur des rebords 7 â 10 et, cela, jusηu'â ce qu'ils soient parfaitement appli¬ qués contre la face horizontale de l 'embase 13 qui en¬ toure 1 'alvéole 12.The film 19 therefore passes through a deformation phase shown schematically in FIG. 3 where we see that it tends to tilt towards the base 13 towards the outside if we consider the cardboard blank. Thus the film 19 under the effect of compressed air causes the edges 7 to 10 to be folded outwards, and this, until they are perfectly applied against the horizontal face of the base 13 which surrounds the cell 12.
Pour que cet effet de pliage soit correct, il est donc nécessaire que la face supérieure de l 'embase 13 s'éten- de autour de l'alvéole 12 sur une distance au moins éga¬ le à la hauteur de dépassement des rebords 7 â 10 lors¬ que le flan est mis en place dans ledit alvéole 12, afin que ces rebords puissent être, sans gêne, appliqués â plat sur 1 'embase 13. La pellicule 19 épouse intimement le fond 1, les parois 3 â 6, les rebords 7 â 10, et éventuellement, la face supérieure de la platine située entre l'arête des re¬ bords et la face intérieure du cadre 16 comme cela est représenté sur la figure 4. Lorsque cette opération de thermo-formage est terminée la pellicule est collée sur le carton et assure la liai¬ son des parois et des rebords en obturant tous les in¬ terstices. On place, alors, la platine 14 en position d'effacement, on coupe la pellicule 19 au ras des re- bords 7 à 10, et l 'on retire l 'emballage terminé.For this folding effect to be correct, it is therefore necessary for the upper face of the base 13 to extend around the cell 12 over a distance at least equal to the height of the edges 7 10 when the blank is placed in said cell 12, so that these edges can be, without discomfort, applied flat on the base 13. The film 19 intimately follows the bottom 1, the walls 3 to 6, the ledges 7 to 10, and optionally, the upper face of the plate situated between the edge of the edges and the inner face of the frame 16 as shown in FIG. 4. When this thermoforming operation is finished the film is glued to the cardboard and ensures the connection of the walls and edges by sealing off all the interstices. The plate 14 is then placed in the erasing position, the film 19 is cut flush with the edges 7 to 10, and the finished packaging is removed.
Comme cela a déjà été précisé, il est nécessaire que les rebords 7 à 10 soient tous dans le même plan sans super¬ position. C'est pourquoi leurs extrémités sont biseau¬ tées pour se joindre le plus exactement possible. En ou- tre , dans l'exemple représenté, on a prévu des pans cou¬ pés de sorte que l 'emballage terminé se présente finale¬ ment sous la forme représentée sur la figure 5. En se reportant maintenant aux figures 6 à 14 on voit qu'un emballage obtenu selon le procédé conforme à l'in- vention peut présenter plusieurs compartiments séparés. En l'occurrence l 'emballage représenté comprend trois compartiments et un tel emballage est obtenu à partir de trois flans de carton différents comme cela va être dé¬ crit maintenant.As has already been specified, it is necessary that the edges 7 to 10 are all in the same plane without super¬ position. This is why their ends are beveled to join as exactly as possible. In addition, in the example shown, sections have been provided so that the finished packaging is finally presented in the form shown in FIG. 5. Referring now to FIGS. 6 to 14, sees that a package obtained according to the process according to the invention may have several separate compartments. In this case, the packaging shown comprises three compartments and such packaging is obtained from three different cardboard blanks as will now be described.
Sur la figure 6, on voit un flan de carton découpé et rainé pour présenter un fond 30 séparé par des lignes de rainage 31 de parois 32, 33, 34 et 35, ces parois co pre^ nant chacune un rebord respectivement 36, 37, 38 et 39 délimités par des lignes de rainage 40. Ce flan est destiné à constituer le grand compartiment A visible tout particulièrement sur les figures 13 et 14. Sur la figure 7, on voit un flan de carton découpé et rainé pour former un fond 41 séparé par des lignes de rainage 42 de parois 43, 44, 45 et 46. Les parois 43 et 46 comprennent chacune un rebord respe tivement 47 et 48, délimité par des lignes de pliage 49. Ce flan est destiné â constituer le compartiment B visi¬ ble en particulier sur les figures 13 et 14. Sur la figure 8 on voit un flan de carton découpé et rai^ né pour présenter un fond 50 séparé par des lignes de rainage 51 de parois 52, 53, 54 et 55. Les parois 52, 54 et 55 présentent chacune un rebord respectivement 56, 57 et 58 délimité par des lignes de rainage 59. Ce flan est destiné â créer le compartiment C plus particulièrement visible sur les figures 13 et 14. Le procédé et le dispositif pour obtenir un emballage complet à partir des flans des figures 6, 7 et 8 sont tout-à-fait comparables à ceux qui ont été précédemment décrits en regard des figures 1 à 5. Mais ici , l 'emballage devant comprendre trois comparti- ments séparés A, B et C, l 'embase 60 comprend alors trois alvéoles 61, 62 et 63 dans lesquels sont placés, après redressement des parois par rapport au fond, les flans des figures 6 à 8. Le flan de la figure 6 est placé dans l'alvéole 61, le flan de la figure 7 est placé dans 1 ' a ^ véole 62 et le flan de la figure 8 est placé dans l 'al¬ véole 63.In Figure 6, there is shown a cut cardboard blank and grooved to provide a 30 separate background by score lines 31 of walls 32, 33, 34 and 35, said walls co pre ^ ing each a respective flange 36, 37, 38 and 39 delimited by creasing lines 40. This blank is intended to constitute the large compartment A visible very particularly in FIGS. 13 and 14. In FIG. 7, we can see a blank of cardboard cut and creased to form a bottom 41 separated by creasing lines 42 of walls 43, 44, 45 and 46. The walls 43 and 46 each include a flange respectively 47 and 48, delimited by fold lines 49. This blank is intended to constitute the compartment B visi ¬ ble in particular in Figures 13 and 14. In Figure 8 we see a blank of cardboard cut and rai ^ born to present a bottom 50 separated by creasing lines 51 of walls 52, 53, 54 and 55. The walls 52, 54 and 55 each have a rim 56, 57 and 58 respectively delimited by creasing lines 59. This blank is intended to create the compartment C more particularly visible in FIGS. 13 and 14. The method and the device for obtaining a complete packaging from the blanks of FIGS. 6, 7 and 8 are all -comparably comparable to those which have been previously described with reference to FIGS. 1 to 5. But here, the packaging having to comprise three separate compartments A, B and C, the base 60 then comprises three cells 61, 62 and 63 in which are placed, after straightening the walls with respect to the bottom, the blanks of FIGS. 6 to 8. The blank of FIG. 6 is placed in the cell 61, the blank of FIG. 7 is placed in the ^ vial 62 and the blank of FIG. 8 is placed in alveoli 63.
OMPI Chacun de ces flans se comporte donc comme celui , uniqu des figures 1 à 5.WIPO Each of these blanks therefore behaves like the one shown in FIGS. 1 to 5.
Comme dans le cas précédent, on place au dessus de l'e base 60, c'est-à-dire au dessus des trois alvéoles à la fois, une pellicule thermo-plastique 64, alors que les différents rebords des flans de carton sont encore dans le prolongement de leur paroi correspondante (fig. 10). La platine 65 associée â l 'embase 60 et qui correspond â la platine 14, comprend trois buses débouchant chacu au droit du centre des trois alvéoles 61 â 63. Sur les figures 11 et 12, on ne voit que deux buses 66 et 67. Selon le même procédé que celui précédemment décrit, o injecte de l'air par des conduits 68 de l'embase 60 et on aspire au dessus de la pellicule 64 par les trois bu ses de la platine 65, on ramollit la pellicule 64 par chauffage, puis on inverse pression et dépression de t le sorte que l'air introduit par les buses de la platin 65 selon les flèches F2 provoquent la déformation de la pellicule 64 en commençant par le centre de chaque al- véole ce qui provoque le pliage des rebords de chacun des trois flans de carton.As in the previous case, a thermo-plastic film 64 is placed above the base 60, that is to say above the three cells at the same time, while the different edges of the cardboard blanks are still in the extension of their corresponding wall (fig. 10). The plate 65 associated with the base 60 and which corresponds to the plate 14, comprises three nozzles each opening at right angles to the center of the three cells 61 to 63. In FIGS. 11 and 12, only two nozzles 66 and 67 are seen. According to the same method as that described above, o injects air through conduits 68 of the base 60 and aspirates above the film 64 by the three nozzles of the plate 65, the film 64 is softened by heating , then reverse pressure and depression of t so that the air introduced by the nozzles of the plate 65 according to the arrows F2 cause the deformation of the film 64, starting at the center of each cell which causes the folding of the edges of each of the three cardboard blanks.
Le pliage des rebords périphériques de l 'emballage com¬ plet (36, 37, 38, 47, 48, 57 et 58) se fait comme celui des rebords 7 à 10. Ces rebords sont biseautés pour se joindre sans super¬ position..The folding of the peripheral edges of the complete package (36, 37, 38, 47, 48, 57 and 58) is done like that of the edges 7 to 10. These edges are bevelled to join without super¬ position.
On remarque dans l 'exemple représenté que les parois 4 45 et 53 ne présentent pas de rebords. En effet ceci c respond à un mode de réalisation selon lequel les deux parois situées en regard l 'une de l 'autre et qui sépa¬ rent deux compartiments voisins sont séparées à leur sommet par la distance correspondant à la largeur d'un seul rebord. Ainsi le compartiment A est séparé des co partiments B et C par les parois 35 d'une part et 44 e 53 d'autre part. Celles-ci se terminent à bord franc tandis que l paroi 35 présente un rebord 39 dont l'are te sera sensiblement jointive avec le bord franc des pa¬ rois 44 et 53.Note in the example shown that the walls 4 45 and 53 do not have edges. Indeed, this corresponds to an embodiment according to which the two walls located opposite one another and which separate two neighboring compartments are separated at their top by the distance corresponding to the width of a single rim . Thus compartment A is separated from co-compartments B and C by the walls 35 on the one hand and 44 e 53 on the other hand. These end on a straight edge while the wall 35 has a rim 39, the area of which you will be substantially contiguous with the free edge of walls 44 and 53.
Selon le même principe, les compartiments B et C sont séparés par les parois 45 et 52. La paroi 45 n'a pas de rebord et se t'ermine à bord franc tandis que la paroi 52 présente le rebord 56 dont l 'arête sera sensiblement join¬ tive avec le bord franc de la paroi 45. C'est pour assurer la continuité dans un même plan, sans superposition, que les rebords 39, 56, 48 et 58 ont des bords diversement découpés.According to the same principle, the compartments B and C are separated by walls 45 and 52. The wall 45 has no flange and t 'ermine to freeboard whereas the wall 52 has the flange 56 whose edge will substantially join¬ tive with the straight edge of the wall 45. It is to ensure continuity in the same plane, without superimposition, that the edges 39, 56, 48 and 58 have variously cut edges.
Le rabattement des rebords 39 et 56 se fait de la même manière que pour les rebords périphériques car, on le voit sur la figure 10, les parois qui séparent deux com¬ partiments voisins font par rapport au fond un angle c< grâce auquel le rebord correspondant a une tendance natu¬ relle à s'incliner dans la direcion voulue lorsqu'il su¬ bit la poussée de la pellicule 64.The folding of the edges 39 and 56 is done in the same way as for the peripheral edges because, as can be seen in FIG. 10, the walls which separate two neighboring compartments form an angle c <with respect to the bottom, thanks to which the edge corresponding to a natural tendency to tilt in the desired direction when it su¬ bit the push of the film 64.
Ceci est schématisé par les flèches des fig. 10, 11 et 13. Lorsque la pellicule 64 est collée sur toute la surface intérieure de l 'emballage et toute la surface supérieure des rebords, c'est-à-dire lorsque l 'opération de thermo¬ formage est terminée, la platine 65 est mise en position d'effacement puis la pellicule 64 est découpé le long des bords extérieurs de l 'emballage, lequel, ainsi terminé, se présente sous la forme de la figure 14.This is shown schematically by the arrows in Figs. 10, 11 and 13. When the film 64 is bonded to the entire inner surface of the packaging and the entire upper surface of the flanges, that is to say when the thermoforming operation is complete, the plate 65 is placed in the erasing position and then the film 64 is cut along the outer edges of the package, which, thus finished, is in the form of FIG. 14.
On voit que les rebords extérieurs comme les rebords 39 et 56 sont tous dans le même plan.We see that the outer edges like the edges 39 and 56 are all in the same plane.
On peut alors obturer l 'emballage au moyen d'un couvercle scellé sur tous les rebords à la fois de telle sorte que les compartiments A, B, et C sont séparés de manière étan¬ che et peuvent contenir différents produits, qu'ils soient solides, liquides, pâteux ou pulvérulents sans qu'il puis se y avoir de mélange entre eux. Selon une variante de l 'invention, la face inférieure de la platine est munie d'éléments additionnels qui doivent venir au contact d'au moins 1 'un des rebords de l 'ëmbal- lage lorsque l 'on abaisse la platine pour provoquer ou, au moins, favoriser le rabattement dudit rebord. Ainsi, sur la figure 15 on voit que cet élément est formé par un relief 70, qui constitue une rampe située â proxi- mité d'un bord de l 'alvéole voulu de l'embase de telle sorte qu'au moment où l 'on abaisse la platine, la pelli¬ cule thermo-plastique tend â incliner le rebord et que cette inclinaison est amplifiée dans le sens voulu grâce à la rampe 70 qui pousse le rebord et, de toutes façons, s'oppose radicalement au pliage de ce rebord dans le sens inverse de celui voulu.The packaging can then be closed off by means of a sealed cover on all the edges at the same time so that the compartments A, B and C are separated in a watertight manner and can contain different products, whether they are solid, liquid, pasty or powdery without there being any mixture between them. According to a variant of the invention, the underside of the plate is provided with additional elements which must come into contact with at least one of the edges of the ëmbal- when the plate is lowered to cause or, at least, favor the folding of said flange. Thus, in Figure 15 we see that this element is formed by a relief 70, which constitutes a ramp located near an edge of the desired cell of the base so that at the moment when the the plate is lowered, the thermo-plastic film tends to tilt the rim and this inclination is amplified in the desired direction thanks to the ramp 70 which pushes the rim and, in any case, radically opposes the folding of this rim in the opposite direction to that desired.
La rampe 70 doit se terminer par un bord aussi peu cou¬ pant que possible pour ne pas risquer de déchirer la pel¬ licule thermo-plastique et doit occuper une position bien précise pour s'étendre à l 'intérieur de l 'alvéole corres¬ pondant et non pas sur le sommet de l'emballage. Selon la variante représentée sur la figure 16, la platin ne comprend pas de relief mais au contraire un creux 71 également en forme de rampe et dont le but est le même que celui du relief 70.The ramp 70 must end with an edge that is as light as possible so as not to risk tearing the thermo-plastic film and must occupy a very precise position to extend inside the corresponding cell. laying and not on the top of the package. According to the variant shown in FIG. 16, the plate does not include a relief but on the contrary a hollow 71 also in the form of a ramp and the purpose of which is the same as that of the relief 70.
La courbe de la rampe est inclinée pour obtenir le rabat¬ tement du rebord dans le sens voulu et pour éviter tout coincement. Cette variante présente l 'avantage d'éviter tous risques de déchirures de la pellicule thermo-plastique.The curve of the ramp is inclined to obtain the flap of the flange in the desired direction and to avoid any jamming. This variant has the advantage of avoiding any risk of tearing of the thermoplastic film.
Selon la variante des figures 17, 18 et 19, on utilise le principe de prévoir un élément additionnel sur la platine pour faciliter, voire provoquer le rabattement des rebord La platine 75, munie d'un joint 76, doit coopérer directe ment avec l 'embase 77, c'est-à-dire sans cadre intermédi¬ aire 16. Mais, ici, au lieu de prévoir un élément additio nel tel que 70 ou 71, individuel â chaque rebord à orien¬ ter , on prévoit une coupole 78 perforée de trous 79 (ou poreuse) et dont le contour peut correspondre sensiblemen à la forme de la concavité de l'emballage.According to the variant of FIGS. 17, 18 and 19, the principle is used of providing an additional element on the plate to facilitate, even provoke the folding of the flanges The plate 75, provided with a seal 76, must cooperate directly with the base 77, that is to say without an intermediate frame 16. But, here, instead of providing an additional element such as 70 or 71, individual to each edge to be oriented, a perforated dome 78 is provided of holes 79 (or porous) and the outline of which can correspond sensiblemen to the shape of the concavity of the packaging.
La courbure de la coupole 78 permet de déformer sans dom¬ mage la pellicule 19 à partir du centre et, ainsi , d'in- cliner les rebords de l 'emballage dans le sens voulu (fig.18) . Lorsque la pellicule 19 est suffisamment ramollie par chau_f fage, l 'air comprimé est envoyé à l 'intérieur de la coupole 78 selon la flèche F 3 et il traverse la coupole 78 par les trous 79 (ou par les passages de sa paroi poreuse, ou par les ouvertures d'une grille qui la constitue) et se répartit selon les flèches F 4 (figure 19). De la sorte, la pellicule 19 est parfaitement appliquée et collée, sur tout l 'intérieur de l 'emballage et sur ses re- bords.The curvature of the dome 78 allows the film 19 to be deformed without damage from the center and, thus, to tilt the edges of the packaging in the desired direction (fig.18). When the film 19 is sufficiently softened by heating, the compressed air is sent inside the dome 78 according to arrow F 3 and it passes through the dome 78 through the holes 79 (or through the passages of its porous wall, or by the openings of a grid which constitutes it) and is distributed according to the arrows F 4 (FIG. 19). In this way, the film 19 is perfectly applied and glued, over the entire interior of the package and on its edges.
Sur la figure 20, on a montré qu'il est possible de prévoir autant de coupoles qu'il y a de compartiments. Ici , on dis¬ tingue une coupole 80 qui correspond au compartiment A et une coupole 81 qui correspond au compartiment B de l 'embal- lage des figures 6 à 14. une troisième coupole (non repré¬ sentée) correspond au compartiment C.In FIG. 20, it has been shown that it is possible to provide as many domes as there are compartments. Here, there is a cupola 80 which corresponds to compartment A and a cupola 81 which corresponds to compartment B of the packaging of FIGS. 6 to 14. a third cupola (not shown) corresponds to compartment C.
Par ailleurs, le procédé d'obtent.ion de l 'emballage est le même que celui précédemment décrit. L'invention n'est pas limitée aux seuls modes de rêalisa- tion décrits et représentés, mais en embrasse, au contrai¬ re, toutes les variantes.Furthermore, the process for obtaining the packaging is the same as that previously described. The invention is not limited only to the embodiments described and shown, but embraces, on the contrary, all variants.
Ainsi , pour les deux parois situées en regard, on peut pré¬ voir non plus un seul rebord sur une seule paroi , mais un rebord par paroi de telle sorte que ces parois sont alors séparées d'une distance sensiblement égale à la somme des largeurs des deux rebords.Thus, for the two opposite walls, one can no longer see a single flange on a single wall, but one flange per wall so that these walls are then separated by a distance substantially equal to the sum of the widths of the two edges.
On peut, également, prévoir qu'aucune des parois ne prëseji te de rebord de sorte qu'à leurs sommets elles sont, alors, sensiblement jointives. Enfin, deux parois en regard peuvent être sensiblement pa¬ rallèles c'est-à-dire que l 'angle (X de la figure 10 est pratiquement droit. C'est tout particulièrement dans cette hypothèse que l 'élément additionnel de la platine (rampe ou coupole) est utile pour donner au rebord la bonne di- rection de rabattement et, cela dans l'hypothèse où, évi¬ demment, un tel rebord est prévu. JU EATIt is also possible to provide that none of the walls have a rim so that at their summits they are then substantially contiguous. Finally, two facing walls can be substantially parallel, that is to say that the angle (X in FIG. 10 is practically straight. It is very particularly in this case that the additional element of the plate ( ramp or dome) is useful for giving the rim the correct direction of drawdown and, this in the event that, obviously, such a rim is provided.
OMPIWIPO
, A , AT

Claims

REVENDICATIONS
- Procédé pour l 'obtention d'un emballage devant compre dre une partie en carton et une partie en matière syn thétique associées l 'une à l 'autre, cet emballage de¬ vant présenter un fond, des parois non parallèles au fond et au -moins un rebord extérieur substantiellemen parallèles au fond, caractérisé en ce que l 'on part d'un flan de carton découpé et rainé pour former le fond, les parois et les rebords, des premières lignes de rainage séparant le fond des parois et des seconde lignes de rainage séparant les parois des rebords, pu que l 'on redresse les parois par rapport au fond, le long des premières lignes de rainage, et qu'on les ma tient ainsi, puis que l 'on dispose la partie en matiè re synthétique sous forme d'une pellicule qui s'étend à la fois au dessus du fond et des parois, puis que l 'on applique la pellicule contre la partie en carton en la déformant vers le fond en commençant par au moi une zone substantiellement centrale et en finissant par la périphérie, cette déformation de la pellicule ayant pour effet de rabattre les rebords le long des secondes lignes de rainage, puis que l'on exerce soit une pression sur la pellicule et les rebords rabattus sous elle, soit, une dépression sous les rebords et l pellicule placée sur eux, soit une combinaison pressi dépression, puis que l 'on interrompt l 'action de déf mation et de pression, respectivement dépression, qua la pellicule adhère â la partie en carton et qu'évent lement, l 'on découpe la pellicule autour des rebords. - Procédé selon la revendication 1, caractérisé en ce q l'on dispose la pellicule â une certaine distance au- dessus du sommet des rebords, ceux-ci étant encore da le prolongement des parois. - Procédé selon la revendication 1, caractérisé en ce q la déformation de la pellicule est obtenue par thermo formage et que la chaleur est répartie sur l 'ensemble de la pellicule mise en place tandisque de l'air com¬ primé est envoyé dans la zone centrale. - Procédé selon la revndication 1, caractérisé en ce que le flan découpé et rainé est mis en forme au moyen d'un conformateur afin de redresser les parois par ra- port au fond tout en laissant les rebords dans le pro- longement des parois, puis que le flan est maintenu ainsi dans-un moule dont la profondeur est telle que les rebords dépassent son sommet, puis que l 'on appli¬ que la pel 1 i cule . - Dispositif pour la mise en oeuvre du procédé selon l 'une quelconque des revendications 1 à 4 ci-dessus, caractérisé en ce qu'il comprend d'une première part une embase dans laquelle est ménagé au moins un alvéole formant moule pour un flan de carton dëeoupé et plié, la profondeur de cet alvéole étant égale à la hauteur des parois du flan afin que des rebords dudit flan placés dans le prolongement desdites parois dépas¬ sent le bord supérieur de l 'avéole et, d'une deuxième ' part, une platine mobile comprenant une source de cha¬ leur ainsi qu'au moins un ajutage d'air comprimé et pouvant être placée en regard de l 'embase et, d'une troisième part, des organes de maintient d'une pelli¬ cule en matière synthétique adaptés à placer cette der¬ nière à une distance au-dessus de l 'embase au moins égale à la largeur des rebords du flan, la platine étant susceptible d'être placée à proximité de l 'em¬ base pour délimiter une chambre substantiellement étan¬ che au-dessus de l 'alvéole. - Dispositif selon la revendication 5, caractérisé en ce que la face supérieure de l 'embase s'étend autour de l 'alvéole sur une distance au moins égale â la hauteur de dépassement des rebords du flan lorsque celui-ci est mis en place dans l 'alvéole. - Dispositif selon la revendication 6, caractérisé en ce que l 'embase comprend au moins deux alvéoles espacés, à leurs sommet, d'une distance égale à celle qui doit séparer deux compartiments de l 'emballage. - Dispositif selon la revendication 5, caractérisé en ce que la face de la platine qui doit faire face à l 'e -- Method for obtaining a packaging having to include a cardboard part and a part made of synthetic material associated with each other, this packaging having a bottom, walls not parallel to the bottom and to the bottom -less an outer rim substantially parallel to the bottom, characterized in that one starts from a blank of cardboard cut and grooved to form the bottom, the walls and the edges, first lines of creasing separating the bottom of the walls and second creasing lines separating the walls from the edges, so that the walls are straightened with respect to the bottom, along the first creasing lines, and that they are held in this way, then that we arrange the material part re synthetic in the form of a film which extends both above the bottom and the walls, then that the film is applied against the cardboard part by deforming it towards the bottom, starting with a self substantially zone central and ending with pa r the periphery, this deformation of the film having the effect of folding the flanges along the second creasing lines, then that one exerts either a pressure on the film and the flaps folded under it, or, a depression under the flanges and the film placed on them, that is a combination pressurized depression, then that one stops the action of def mation and pressure, respectively depression, that the film adheres to the cardboard part and that eventually, one cut the film around the edges. - Method according to claim 1, characterized in that the film is placed at a certain distance above the top of the edges, these being still da extension of the walls. - Method according to claim 1, characterized in that the deformation of the film is obtained by thermoforming and that the heat is distributed over the whole of the film placed while compressed air is sent to the area central. - Method according to claim 1, characterized in that the cut and grooved blank is shaped by means of a shaping device in order to straighten the walls by means of the bottom while leaving the edges in the extension of the walls, then that the blank is thus held in a mold whose depth is such that the edges exceed its top, then that one applies that the pel 1 i cule. - Device for implementing the method according to any one of claims 1 to 4 above, characterized in that it firstly comprises a base in which is formed at least one cell forming a mold for a blank dëeoupé cardboard and folded, the depth of this recess being equal to the height of the walls of the blank so that the edges of said blank placed in the extension of said walls dépas¬ feels the upper edge of the Waffle and a second 'share , a movable plate comprising a source of heat and at least one nozzle of compressed air and which can be placed opposite the base and, thirdly, members for maintaining a film made of synthetic material suitable for placing the latter at a distance above the base at least equal to the width of the edges of the blank, the plate being capable of being placed near the base to delimit a substantial room ment étan¬ che above the alveolus. - Device according to claim 5, characterized in that the upper face of the base extends around the cell over a distance at least equal to the height of excess of the edges of the blank when the latter is placed in the socket. - Device according to claim 6, characterized in that the base comprises at least two cells spaced, at their apex, by a distance equal to that which must separate two compartments of the packaging. - Device according to claim 5, characterized in that the face of the plate which must face the e -
OMPÏ base est munie d'au moins un élément additionnel sus ceptible de favoriser mécaniquement le rabattement des rebords de l 'emballage. - Dispositif selon la revendication 8, caractérisé en ce que l'élément additionnel est une coupole apte â être traversée par de l 'air comprimé et devant se pl cer dans une concavité de l 'emballage lorsque la pla tine est appliquée contre l 'embase. - Dispositif selon la revendication 8, caractérisé en ce que l 'élément additionnel est une rampe inclinée située â proximité d'un bord d'alvéole de l 'embase. - Dispositif selon la revendication 5, caractérisé en ce qu'il comprend un cadre qui est interposé entre l 'embase et la platine autour de l 'alvéole et qui a une hauteur un peu supérieure à la distance de dépas sement des rebords du flan. - Dispositif selon la revendication 11, caractérisé en ce que le cadre est placé sur l 'embase et présente une gorge supérieure avec laquelle doit coopérer un joint prévu sur la platine. - Emballage obtenu selon l'une quelconque des revendi¬ cations ci-dessus caractérisé en ce qu'il comprend a moins un fond, des parois qui s'étendent dans des pla formant chacun avec le fond, respectivement chacun d fonds, un angle supérieur d'au moins quelques degrés à un angle droit et des rebords qui s'étendent dans un plan séc-ant à ceux des parois, certains rebords a moins présentant des extrémités biseautées afin que deux rebords adjacents soient au plus jointifs dans un même plan, c'est-à-dire sans recouvrement. - Emballage selon la revendication 13, caractérisé en ce que comportant au moins deux compartiments séparé il comprend au moins deux fonds et quatre parois par fond, dont au moins deux sont en regard l 'une de 1 ' autre. - Emballage selon la revendication 14, caractérisé en ce que deux parois en regard sont séparées à leur so met, par au moins un rebord. - Emballage selon la revendication 14, caractérisé en ce que chacune des deux* parois en regard présente un rebord et ces deux rebords sont dans un même plan, les sommets de ces deux parois étant alors séparés d'une distance sensiblement égale à la somme des lar¬ geurs des deux rebords. - Emballage selon la revendication 15, caractérisé en ce qu'une seule de deux parois situées en regard pré¬ sente un rebord, les sommets de ces deux parois étant alors séparés d'une distance sensiblement égale â celle dudit rebord. - Emballage selon la revendication 14, caractérisé en ce qu'aucune des deux parois situées en regard l 'une de l'autre ne présente de rebord, les sommets de ces deux parois étant alors sensiblement jointifs. - Emballage selon la revendication 14, caractérisé en ce que deux parois en regard sont sensiblement paral¬ lèles.OMPI base is provided with at least one additional element capable of mechanically promoting the folding of the edges of the packaging. - Device according to claim 8, characterized in that the additional element is a dome capable of being traversed by compressed air and having to be placed in a concavity of the packaging when the plate is applied against the base . - Device according to claim 8, characterized in that the additional element is an inclined ramp located near an edge of the socket of the base. - Device according to claim 5, characterized in that it comprises a frame which is interposed between the base and the plate around the cell and which has a height slightly greater than the distance beyond the edges of the blank. - Device according to claim 11, characterized in that the frame is placed on the base and has an upper groove with which a seal provided on the plate must cooperate. - Packaging obtained according to any one of the claims above, characterized in that it comprises, at least one bottom, walls which extend in pla each forming with the bottom, each each with a bottom, a greater angle at least a few degrees at a right angle and ledges which extend in a plane sec-ant to those of the walls, some ledges having less bevelled ends so that two adjacent edges are at most contiguous in the same plane, that is to say without recovery. - Packaging according to claim 13, characterized in that comprising at least two separate compartments it comprises at least two bottoms and four walls per bottom, at least two of which are opposite one another. - Packaging according to claim 14, characterized in that two facing walls are separated at their so met, by at least one flange. - Packaging according to claim 14, characterized in that each of the two * facing walls has a flange and the two flanges are in the same plane, the tops of these two walls being then separated by a distance substantially equal to the sum of widths of the two edges. - Packaging according to claim 15, characterized in that only one of two walls located opposite presents a rim, the vertices of these two walls then being separated by a distance substantially equal to that of said rim. - Packaging according to claim 14, characterized in that none of the two walls located opposite one another has a rim, the vertices of these two walls then being substantially contiguous. - Packaging according to claim 14, characterized in that two facing walls are substantially parallel.
OMPIWIPO
<fy_ WW11PPOO <fy_ WW11PPOO
EP79900016A 1977-12-19 1979-07-16 Process and device for producing a packing, and the packing produced Expired EP0009019B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7738173A FR2411701A1 (en) 1977-12-19 1977-12-19 PROCEDURE AND DEVICE FOR OBTAINING A PACKAGING AS WELL AS THE PACKAGING SO OBTAINED
FR7738173 1977-12-19

Publications (2)

Publication Number Publication Date
EP0009019A1 true EP0009019A1 (en) 1980-03-19
EP0009019B1 EP0009019B1 (en) 1983-05-04

Family

ID=9198992

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79900016A Expired EP0009019B1 (en) 1977-12-19 1979-07-16 Process and device for producing a packing, and the packing produced

Country Status (5)

Country Link
EP (1) EP0009019B1 (en)
JP (1) JPS55500217A (en)
DE (1) DE2862244D1 (en)
FR (1) FR2411701A1 (en)
WO (1) WO1979000409A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2610595B1 (en) * 1987-02-10 1989-06-16 Socar MACHINE FOR THE THERMOFORMING OF A WATERPROOF FILM WITHIN A CARTON CONTAINER AND FOR THE CAPPING OF THE CONTAINER
FR2802464A1 (en) * 1999-12-17 2001-06-22 Rene Lacroix & Cie Ets Manufacturing procedure, for packaging box comprising ring, has internal thermoplastic lining impervious to liquid placed in it and pneumatically pressurized
FR2979329B1 (en) * 2011-08-26 2013-08-23 Cgl Pack Service COMPRESSED COMPOSITE TRAY
ES2679094B1 (en) * 2017-02-15 2019-06-21 Indutec Solid S L TERMO-CONFORMED PROCEDURE OF A SOLID SURFACE
FR3119839B1 (en) * 2021-02-12 2023-10-06 Groupe Guillin Sa Bi-material packaging of plastic and cardboard or other bio-sourced material with lid.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1479017B1 (en) * 1961-11-23 1970-02-12 Christensson O W Method for producing a lining of a container made of cardboard or a similar material with a film made of thermoplastic material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO7900409A1 *

Also Published As

Publication number Publication date
JPS55500217A (en) 1980-04-17
WO1979000409A1 (en) 1979-07-12
FR2411701A1 (en) 1979-07-13
FR2411701B1 (en) 1981-01-30
EP0009019B1 (en) 1983-05-04
DE2862244D1 (en) 1983-06-09

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