EP0007944B1 - Manufacturing process of a folded cardboard packing covered with an impervious sheet and blank for use in the process - Google Patents
Manufacturing process of a folded cardboard packing covered with an impervious sheet and blank for use in the process Download PDFInfo
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- EP0007944B1 EP0007944B1 EP19780900134 EP78900134A EP0007944B1 EP 0007944 B1 EP0007944 B1 EP 0007944B1 EP 19780900134 EP19780900134 EP 19780900134 EP 78900134 A EP78900134 A EP 78900134A EP 0007944 B1 EP0007944 B1 EP 0007944B1
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- Prior art keywords
- blank
- lines
- container
- cardboard
- walls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
- B65D5/42—Details of containers or of foldable or erectable container blanks
- B65D5/56—Linings or internal coatings, e.g. pre-formed trays provided with a blow- or thermoformed layer
Definitions
- the present invention relates to containers obtained from a flat cardboard blank, cut and marked with fold lines, this blank then being folded along these lines to be set in volume.
- the purpose of the line marking operation is to weaken the cardboard in well-defined places, where it must be folded when it is placed in volume.
- the fold lines can be obtained by notching the cardboard, by perforating it or by providing "creasing" lines.
- the creasing is obtained by means of a male member called “repressor” and a female counterpart called “gutter” so that the repressor produces a permanent deformation of the cardboard by forcing it to penetrate into the gutter.
- a crease line therefore comprises a hollow part, or "female” formed by the repressor and a raised part called “bead”.
- a sheet of cardboard being put in place to be creased it is equally possible to provide the bead on the lower face or on the upper face of the cardboard sheet. But, on the other hand, the subsequent folding must always be done in a given direction, that is to say that the female part corresponds to the outside of the fold and constitutes, in a way, the male edge of the object obtained by folding.
- containers which consist of a suitably cut, creased and folded cardboard part and a part made of synthetic material applied to the entire internal surface of the container by thermoforming.
- thermoforming consists in placing a plastic sheet above the cardboard part and then causing the plastic sheet to deform by heating it and applying air pressure to it so that this plastic sheet closely follows the shapes of the cardboard part and is applied as perfectly as possible along the concave as well as convex edges.
- thermoformed plastic sheet has a concave shape, such as a tray for example, we understand that when we start to deform the sheet synthetic material, this expels the air between it and the cardboard part and, of course, this air must be able to escape as completely as possible so that, often, a lower air intake is added at higher air pressure.
- the present invention relates to a container of this type, that is to say comprising a cardboard part and a plastic part associated by thermoforming and which does not have the above drawbacks.
- French patent application 2294097 is also known, which relates to a particular container, in the sense that it is obtained from a blank of cardboard cut out and then sandwiched between two external films then, subsequently, folded to constitute a volume.
- the notches or V-shaped folding grooves are hollowed out over approximately two thirds of the thickness of the cardboard and their shape is the one which causes the least constraints "during the erection of the blank, in the outer films subsequently applied to the blank".
- the cardboard blank is folded along lines (marked in two different directions, moreover) before the establishment of a film on the marked face.
- the present invention relates to a method of manufacturing a container from at least one blank cut out and provided with markings constituting fold lines, this blank having to be subsequently formed by folding along these lines in order to present a bottom, walls which extend at an angle to the plane of the bottom and at least one flange which extends at an angle to the plane of the wall to which it is attached (see FR-A-2197776), characterized in that all the markings are carried out on the face of the blank which must correspond to the interior of the container so that their female part is situated on this face, the fold lines between the bottom and the walls being crease lines , that is to say lines comprising on one side a hollow or female part and on the other side a raised part, then fold the blank along these lines outwards for the or the edges and inwards for the walls and that we maintain ent the container thus placed in volume, then that is applied to the entire marked face and which constitutes both the interior of the container and its rim, a continuous waterproof film which covers the fold lines and keeps the container in shape ,
- a container in accordance with the invention is obtained from a blank of cardboard cut out and provided with markings constituting fold lines to present a bottom 1, side walls 2 to 9 and upper edges to be located at the periphery of the finished container, 10 to 17.
- the bottom is delimited with respect to the side walls by crease lines 18 and the side walls are delimited with respect to the edges by notches 19.
- the crease lines 18 and the notches 19 are all formed on the face of the blank which will constitute the interior of the finished container, so that their female parts are located on this interior face.
- the notches 19 are therefore formed in the usual direction and the folding of the edges does not pose any problem, so that these edges will not only be sharp to have a rectilinear edge but also well planes since no constraint will tend to bend or deform these edges.
- the creasing lines 18 are oriented in the opposite direction to that which is necessary to obtain a correct folding, since the folding of the side walls with respect to the bottom will be inward (i.e. towards the female part) instead of going outside.
- the air comprised between the inner face of the cardboard part and the plastic film 20 tends to be forced from the center towards the periphery of the bottom 1 and when the blank is marked. in accordance with the invention, this air can easily escape along the lines of grooves 18 towards the spaces which remain between the side walls, so that the film applies perfectly without creating any air bubble.
- the lines 19 could be traditional creasing lines since their female parts being provided on the internal face of the container, the folding of the edges towards the outside would be in the right direction.
- edges 10 to 16 covered with the plastic sheet 20 are perfectly flat, rigid and are not subject to any permanent stress.
- this plastic sheet 20 closes the cutout 19 by restoring the seal (or by creating it) and keeps the edges perfectly horizontal.
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Abstract
Description
La présente invention concerne les contenants obtenus à partir d'un flan en carton plat, découpé et marqué de lignes de pliage, ce flan étant ensuite plié le long de ces lignes pour être mis en volume.The present invention relates to containers obtained from a flat cardboard blank, cut and marked with fold lines, this blank then being folded along these lines to be set in volume.
Le but de l'opération de marquage des lignes est d'affaiblir le carton en des endroits bien définis, là où il doit être plié lors de sa mise en volume.The purpose of the line marking operation is to weaken the cardboard in well-defined places, where it must be folded when it is placed in volume.
Il est important d'obtenir des marquages aussi nets que possible à la fois pour l'apparence du contenant et pour son aptitude au passage sur une chaîne automatique de conditionnement par exemple.It is important to obtain markings as clear as possible both for the appearance of the container and for its ability to pass through an automatic packaging line for example.
Les lignes de pliage peuvent être obtenues en entaillant le carton, en le perforant ou en prévoyant des lignes de «rainage».The fold lines can be obtained by notching the cardboard, by perforating it or by providing "creasing" lines.
Le rainage est obtenu au moyen d'un organe mâle appelé «refouleur» et d'une contrepartie femelle appelée «gouttière» de telle sorte que le refouleur produit une déformation permanente du carton en l'obligeant à pénétrer dans la gouttière.The creasing is obtained by means of a male member called "repressor" and a female counterpart called "gutter" so that the repressor produces a permanent deformation of the cardboard by forcing it to penetrate into the gutter.
Une ligne de rainage comprend donc une partie en creux, ou «femelle» formée par le refouleur et une partie en relief appelée «bourrelet».A crease line therefore comprises a hollow part, or "female" formed by the repressor and a raised part called "bead".
Une feuille de carton étant mise en place pour être rainée on peut indifféremment prévoir le bourrelet sur la face inférieure ou sur la face supérieure de la feuille en carton. Mais, en revanche, le pliage ultérieur doit toujours se faire dans un sens donné c'est-à-dire que la partie femelle correspond à l'extérieur du pli et constitue, en quelque sorte, l'arête mâle de l'objet obtenu par pliage.A sheet of cardboard being put in place to be creased, it is equally possible to provide the bead on the lower face or on the upper face of the cardboard sheet. But, on the other hand, the subsequent folding must always be done in a given direction, that is to say that the female part corresponds to the outside of the fold and constitutes, in a way, the male edge of the object obtained by folding.
En effet, quand on amorce le pliage le long d'une ligne de rainage, cette déformation permanente provoque une tension entre les couches que l'on peut observer lorsqu'on regarde la ligne de rainage en coupe. Lorsque cette tension est supérieure à la force de cohésion des couches, le carton «se délamine» et provoque l'effet de charnière désiré.Indeed, when we start folding along a crease line, this permanent deformation causes a tension between the layers that we can observe when looking at the crease line in section. When this tension is greater than the cohesive force of the layers, the cardboard "delaminates" and causes the desired hinge effect.
Si l'on essayait de plier le carton en sens inverse, c'est-à-dire en prévoyant le bourrelet à l'extérieur du pliage, on obtiendrait un effet élastique qui tendrait à ouvrir la charnière et l'on ne pourrait pas obtenir un objet à surface bien plane et à arêtes bien droites. On obtiendrait au contraire des déformations plus ou moins aléatoires et qui tendent à donner aux panneaux des surfaces non planes et, pourrait-on dire, «gonflées», tandis que l'angle tendrait à s'ouvrir au lieu de rester exactement de la valeur qu'on veut lui donner.If we tried to fold the cardboard in the opposite direction, that is to say by providing the bead outside of the folding, we would obtain an elastic effect which would tend to open the hinge and we could not obtain an object with a very flat surface and very straight edges. On the contrary, we would obtain more or less random deformations which tend to give the panels non-planar and, one might say, "swollen" surfaces, while the angle would tend to open instead of remaining exactly the same. we want to give him.
En outre, avec certaines qualités de carton dont le module d'élasticité est médiocre, on aurait une arête extérieure non pas rectiligne et nette mais comme formée de plusieurs lignes plus ou moins inclinées et qui donnent l'impression que le carton est comme cassé.In addition, with certain qualities of cardboard whose modulus of elasticity is poor, there would be an outer edge not straight and sharp but as formed by several more or less inclined lines and which give the impression that the cardboard is as broken.
Par ailleurs, on connaît des contenants qui sont constitués d'une partie en carton convenablement découpée, rainée et pliée et d'une partie en matière synthétique appliquée sur toute la surface interne du contenant par thermoformage.Furthermore, containers are known which consist of a suitably cut, creased and folded cardboard part and a part made of synthetic material applied to the entire internal surface of the container by thermoforming.
Comme on le sait, le thermoformage consiste à placer une feuille en matière synthétique au-dessus de la partie en carton puis à provoquer la déformation de la feuille en matière synthétique en la chauffant et en lui appliquant une pression d'air de telle sorte que cette feuille en matière synthétique épouse étroitement les formes de la partie en carton et s'applique le plus parfaitement possible le long des arêtes concaves aussi bien que convexes.As is known, thermoforming consists in placing a plastic sheet above the cardboard part and then causing the plastic sheet to deform by heating it and applying air pressure to it so that this plastic sheet closely follows the shapes of the cardboard part and is applied as perfectly as possible along the concave as well as convex edges.
Lorsque la partie en carton que l'on veut recouvrir d'une feuille en matière synthétique thermo- formée a une forme concave, telle qu'une barquette par exemple, on comprend qu'au moment où l'on commence à déformer la feuille en matière synthétique, celle-ci refoule l'air compris entre elle et la partie en carton et, bien entendu, il faut que cet air puisse s'échapper aussi complètement que possible de sorte que, souvent, on adjoint une aspiration d'air inférieure à la pression d'air supérieure.When the cardboard part that we want to cover with a thermoformed plastic sheet has a concave shape, such as a tray for example, we understand that when we start to deform the sheet synthetic material, this expels the air between it and the cardboard part and, of course, this air must be able to escape as completely as possible so that, often, a lower air intake is added at higher air pressure.
Néanmoins, comme la feuille en matière synthétique doit se coller sur toute la surface de la partie en carton, il peut se faire que de l'air reste occlus entre cette partie en carton et la feuille en matière synthétique et cela se produit tout particulièrement au voisinage des arêtes concaves.However, as the plastic sheet must stick to the entire surface of the cardboard part, it may happen that air remains occluded between this cardboard part and the plastic sheet and this occurs especially at neighborhood of concave edges.
La présence de ces bulles d'air est un grave inconvénient non seulement vis-à-vis de l'aspect extérieur du contenant mais également par le fait que si l'air se dilate à la suite d'une élévation de température par exemple, il peut provoquer la déchirure de la feuille en matière synthétique qui assure l'étanchéité par rapport au carton, de sorte que de tels contenants doivent être mis au rebut lorsqu'ils présentent des bulles d'air.The presence of these air bubbles is a serious disadvantage not only with regard to the external appearance of the container but also by the fact that if the air expands following a rise in temperature for example, it can cause tearing of the plastic sheet which seals against the cardboard, so that such containers must be discarded when they have air bubbles.
La présente invention concerne un contenant de ce type, c'est-à-dire comprenant une partie en carton et une partie en matière synthétique associées par thermoformage et qui ne présente pas les inconvénients ci-dessus.The present invention relates to a container of this type, that is to say comprising a cardboard part and a plastic part associated by thermoforming and which does not have the above drawbacks.
Pour illustrer l'état de la technique, on peut citer la demande de brevet français 2197776 qui décrit un contenant en carton, parmi tant d'autres, qui comprend des lignes de pliage.To illustrate the state of the art, we can cite the French patent application 2197776 which describes a cardboard container, among many others, which includes fold lines.
Naturellement, la présente demande ne revendique pas en soi le marquage d'un flan en carton en vue de son pliage ultérieur, ce marquage étant évoqué seulement pour situer le domaine technique auquel il est fait référence.Naturally, the present application does not in itself claim the marking of a cardboard blank for its subsequent folding, this marking being mentioned only to locate the technical field to which reference is made.
On connaît également la demande de brevet français 2294097 qui concerne un contenant particulier, en ce sens qu'il est obtenu à partir d'un flan de carton découpé puis placé en sandwich entre deux pellicules extérieures puis, ultérieurement, plié pour constituer un volume.French patent application 2294097 is also known, which relates to a particular container, in the sense that it is obtained from a blank of cardboard cut out and then sandwiched between two external films then, subsequently, folded to constitute a volume.
Il est clair que le pliage d'un complexe à trois couches pose des problèmes et cette demande de brevet propose une solution qui consiste à entailler le flan de carton avant de le recouvrir de pellicule afin d'affaiblir le flan de carton au maximum.It is clear that the folding of a three-layer complex poses problems and this patent application proposes a solution which consists in nicking the cardboard blank before covering it with film in order to weaken the cardboard blank as much as possible.
Ainsi que cela est précisé page 2, lignes 13 à 17 de cette demande de brevet, les entailles ou rainures de pliage en forme de V sont évidées sur environ les deux tiers de l'épaisseur du carton et leur forme est celle qui provoque le moins de contraintes «au cours de l'érection du flan, dans les pellicules extérieures ultérieurement appliquées sur le flan».As specified on
Il est ainsi clairement précisé que le but unique de ces entailles est de favoriser le pliage.It is thus clearly stated that the sole purpose of these notches is to promote folding.
Au contraire, selon l'invention, le flan de carton est plié selon des lignes (marquées dans deux sens différents, d'ailleurs) avant la mise en place d'une pellicule sur la face marquée.On the contrary, according to the invention, the cardboard blank is folded along lines (marked in two different directions, moreover) before the establishment of a film on the marked face.
Comme cela apparaître ci-après, la prévision de ces marquages a pour but essentiel de permettre une application parfaite de la pellicule sur le carton en autorisant l'évacuation de l'air compris entre le carton et la pellicule.As will appear below, the prediction of these markings has the essential aim of allowing a perfect application of the film on the cardboard by allowing the evacuation of the air included between the cardboard and the film.
La présente invention concerne un procédé de fabrication d'un contenant à partir d'au moins un flan découpé et muni de marquages constituant des lignes de pliage, ce flan devant ultérieurement être mis en volume par pliage le long de ces lignes afin de présenter un fond, des parois qui s'étendent selon un angle par rapport au plan du fond et au moins un rebord qui s'étend selon un angle par rapport au plan de la paroi dont il est solidaire (voir FR-A-2197776), caractérisé en ce que tous les marquages sont effectués sur la face du flan qui devra correspondre à l'intérieur du contenant de telle sorte que leur partie femelle soit située sur cette face, les lignes de pliage entre le fond et les parois étant des lignes de rainage, c'est-à-dire des lignes comportant sur une face une partie en creux ou femelle et sur l'autre face une partie en relief, puis que l'on plie le flan le long de ces lignes vers l'extérieur pour le ou les rebords et vers l'intérieur pour les parois et que l'on maintient le contenant ainsi mis en volume, puis que l'on applique sur toute la face marquée et qui constitue à la fois l'intérieur du contenant et son rebord, une pellicule étanche continue qui recouvre les lignes de pliage et maintient le contenant en forme, les lignes de rainage entre le fond et les parois étant telles qu'elles permettent à l'air compris entre le flan et la pellicule de s'échapper latéralement le long des lignes de rainage.The present invention relates to a method of manufacturing a container from at least one blank cut out and provided with markings constituting fold lines, this blank having to be subsequently formed by folding along these lines in order to present a bottom, walls which extend at an angle to the plane of the bottom and at least one flange which extends at an angle to the plane of the wall to which it is attached (see FR-A-2197776), characterized in that all the markings are carried out on the face of the blank which must correspond to the interior of the container so that their female part is situated on this face, the fold lines between the bottom and the walls being crease lines , that is to say lines comprising on one side a hollow or female part and on the other side a raised part, then fold the blank along these lines outwards for the or the edges and inwards for the walls and that we maintain ent the container thus placed in volume, then that is applied to the entire marked face and which constitutes both the interior of the container and its rim, a continuous waterproof film which covers the fold lines and keeps the container in shape , the crease lines between the bottom and the walls being such that they allow the air between the blank and the film to escape laterally along the crease lines.
L'invention sera mieux comprise à l'aide de la description détaillée ci-après faite en référence aux dessins annexés. Bien entendu, la description et les dessins ne sont donnés qu'à titre d'exemple indicatif et non limitatif.
- La fig. 1 est une vue en plan d'un flan découpé et marqué conformément à l'invention;
- La fig. 2 est une vue en coupe faite selon la ligne II-II de la fig. 1;
- La fig. 3 est une vue partielle à plus grande échelle montrant un détail de la fig. 2;
- La fig. 4 est une vue partielle en coupe d'un contenant conforme à l'invention avant mise en place de la pellicule thermoplastique.
- La fig. 5 est une vue analogue à la fig. 4 après mise en place de la pellicule thermoplastique.
- Fig. 1 is a plan view of a blank cut and marked in accordance with the invention;
- Fig. 2 is a sectional view taken along line II-II of FIG. 1;
- Fig. 3 is a partial view on a larger scale showing a detail of FIG. 2;
- Fig. 4 is a partial sectional view of a container according to the invention before fitting the thermoplastic film.
- Fig. 5 is a view similar to FIG. 4 after installation of the thermoplastic film.
En se reportant aux dessins, on voit qu'un contenant conforme à l'invention est obtenu à partir d'un flan de carton découpé et muni de marquages constituant des lignes de pliage pour présenter un fond 1, des parois latérales 2 à 9 et des rebords supérieurs devant se situer à la périphérie du contenant terminé, 10 à 17.Referring to the drawings, it can be seen that a container in accordance with the invention is obtained from a blank of cardboard cut out and provided with markings constituting fold lines to present a
Le fond est délimité par rapport aux parois latérales par des lignes de rainage 18 et les parois latérales sont délimitées par rapport aux rebords par des entailles 19.The bottom is delimited with respect to the side walls by
Conformément à l'invention, les lignes de rainage 18 et les entailles 19 sont toutes formées sur la face du flan qui constituera l'intérieur du contenant terminé, de telle sorte que leurs parties femelles soient situées sur cette face intérieure.According to the invention, the
Lorsque le flan sera plié pour être mis dans sa forme définitive, ainsi qu'on le voit sur les fig. 4 et 5, les parois latérales seront redressées vers l'intérieur tandis que les rebords seront rabattus vers l'extérieur.When the blank is folded to be put into its final shape, as seen in figs. 4 and 5, the side walls will be straightened inwards while the edges will be folded outwards.
Les entailles 19 sont donc formées dans le sens habituel et le pliage des rebords ne pose pas de problème, de sorte que ces rebords seront non seulement nets pour avoir une arête rectiligne mais également bien plans puisqu'aucune contrainte ne viendra tendre à courber ou à déformer ces rebords.The
En revanche, les lignes de rainage 18 sont orientées dans le sens contraire à celui qui est nécessaire pour obtenir un pliage correct, puisque le pliage des parois latérales par rapport au fond se fera vers l'intérieur (c'est-à-dire vers la partie femelle) au lieu de se faire vers l'extérieur.On the other hand, the
En d'autres termes, c'est le bourrelet qui sera situé à l'extérieur après pliure, de sorte qu'en principe, on doit trouver ici les-inconvénients indiqués plus haut, c'est-à-dire un effet de ressort qui tend à ouvrir la «charnière».In other words, it is the bead which will be located outside after folding, so that in principle, the disadvantages indicated above must be found here, that is to say a spring effect. which tends to open the "hinge".
Or, les recherches conduites par les demandeurs, on fait apparaître un avantage..spécifique à ce genre de contenant car la partie en carton devant être recouverte d'une pellicule en matière synthétique 20 (fig. 5), c'est cette pellicule en matière synthétique qui, en s'appliquant correctement sur toute la surface du contenant, maintient les parois latérales convenablement dressées.However, the research conducted by the applicants has revealed an advantage..specific to this kind of container because the cardboard part to be covered with a plastic film 20 (fig. 5), it is this film in synthetic material which, when applied correctly over the entire surface of the container, keeps the side walls properly erected.
En outre, et ceci est un point très important, l'air compris entre la face intérieure de la partie en carton et la pellicule en matière synthétique 20 tend à être refoulé depuis le centre vers la périphérie du fond 1 et lorsque le flan est marqué conformément à l'invention, cet air peut facilement s'échapper le long des lignes de rainages 18 vers les espaces qui subsistent entre les parois latérales, de sorte que la pellicule s'applique parfaitement sans créer aucune bulle d'air.In addition, and this is a very important point, the air comprised between the inner face of the cardboard part and the
Avec une ligne de rainage traditionnelle, on obtiendrait l'effet inverse car l'effet de délaminage du carton après pliage amplifie la saillie du bourrelet et crée en quelque sorte deux canaux longitudinaux de part et d'autre de ce bourrelet, de sorte que l'air reste occlus dans au moins le canal inférieur et provoque des bulles d'air qui empêchent le collage parfait de la pellicule en matière synthétique sur la partie en carton.With a traditional creasing line, the opposite effect would be obtained because the delamination effect of the cardboard after folding amplifies the projection of the bead and in a way creates two longitudinal channels on either side of this bead, so that the the air remains blocked in at least the lower channel and causes air bubbles which prevent the perfect bonding of the plastic film on the cardboard part.
Les lignes 19 pourraient être des lignes de rainage traditionnelles puisque leurs parties femelles étant prévues sur la face interne du contenant, le rabattement des rebords vers l'extérieur se ferait dans le bon sens.The
Cependant, conformément à l'invention, il est important que le pliage des rebords par rapport aux parois latérales soit aussi net que possible car ce rebord doit avoir une fonction de précision lorsque l'on veut fermer ce contenant au moyen d'un couvercle thermoscellé sur ce rebord.However, in accordance with the invention, it is important that the folding of the edges relative to the side walls is as clean as possible because this edge must have a precision function when one wants to close this container by means of a heat-sealed lid. on this ledge.
Il faut donc que les rebords 10 à 16 recouverts de la feuille en matière synthétique 20 soient parfaitement plans, rigides et ne soient soumis à aucune contrainte permanente.It is therefore necessary that the
C'est pourquoi, au lieu de prévoir une ligne de rainage 18 avec une partie femelle et une partie mâle, on prévoit une coupe sur une profondeur x (fig. 3) qui est de l'ordre de la moitié de l'épaisseur y du flan de carton.This is why, instead of providing a
Il est clair qu'une telle découpe affaiblit le carton et lui ôte toute étanchéité pour le cas où il serait revêtu d'une couche extérieure.It is clear that such a cut weakens the cardboard and removes any waterproofing in case it is coated with an outer layer.
Mais, comme la feuille en matière synthétique est destinée à recouvrir à la fois les rebords et les parois latérales, cette feuille en matière synthétique 20 obture la découpe 19 en reconstituant l'étanchéité (ou en la créant) et maintient les rebords parfaitement horizontaux.However, as the plastic sheet is intended to cover both the edges and the side walls, this
On voit que la coupe des lignes 19 permet à l'air qui s'y trouve avant la mise en place de la feuille en matière synthétique 20 de s'échapper latéralement ce qui évite, ici encore, la formation de bulles.It can be seen that the cutting of the
L'important étant de créer entre les rebords et les parois latérales une ligne de pliage extrêmement nette, on peut à la place de la découpe 19, représentée au dessin sous forme d'un coupure continue, prévoir des perforations alignées qui assurent à la fois la pliure correcte et le refoulement de l'air vers l'extérieur.The important thing is to create an extremely sharp fold line between the edges and the side walls, instead of the
Claims (3)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7729714 | 1977-10-03 | ||
| FR7729714A FR2404566A1 (en) | 1977-10-03 | 1977-10-03 | PROCESS FOR MANUFACTURING A PACKAGING AND PACKAGING OBTAINED FROM THIS PROCESS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0007944A1 EP0007944A1 (en) | 1980-02-20 |
| EP0007944B1 true EP0007944B1 (en) | 1984-01-25 |
Family
ID=9196045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19780900134 Expired EP0007944B1 (en) | 1977-10-03 | 1979-04-09 | Manufacturing process of a folded cardboard packing covered with an impervious sheet and blank for use in the process |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0007944B1 (en) |
| DE (1) | DE2862367D1 (en) |
| FR (1) | FR2404566A1 (en) |
| WO (1) | WO1979000170A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2480708A1 (en) * | 1980-11-07 | 1981-10-23 | Impression Cartonnage Ste Pari | CONTAINER IN CARDBOARD COATED WITH A SYNTHETIC FILM AND PROVIDED WITH A PERIPHERAL FRAME IN A SINGLE PIECE AND A MANUFACTURING METHOD THEREOF |
| US4555381A (en) * | 1980-11-07 | 1985-11-26 | Societe Parisienne D'impression Et De Cartonnage | Process of making folded cardboard container covered by a layer of synthetic material and provided with a peripheral frame |
| FR2570645B1 (en) * | 1984-09-24 | 1989-07-21 | Poudres & Explosifs Ste Nale | METHOD FOR MANUFACTURING FUEL OBJECTS BY STAMPING FUEL PAPER AND FUEL OBJECTS THUS OBTAINED |
| FR2596145B1 (en) * | 1986-03-21 | 1990-03-09 | Poudres & Explosifs Ste Nale | PROCESS FOR THE MANUFACTURE OF FUEL OBJECTS BY STAMPING FUEL PAPER DISCS USING A FLEXIBLE PUNCH |
| DE3723192A1 (en) * | 1987-07-14 | 1989-01-26 | Unilever Nv | CARDBOARD BOWL WITH DRAWN PLASTIC PART |
| JPH03102485U (en) * | 1990-02-08 | 1991-10-24 | ||
| US5326021A (en) * | 1993-01-28 | 1994-07-05 | Westvaco Corporation | Rigid insulated food tray |
| US5377903A (en) * | 1994-06-16 | 1995-01-03 | International Paper Company | Reduced warp paperboard tray |
| FR2975973B1 (en) * | 2011-05-30 | 2014-04-04 | Formkraft | METHOD FOR MANUFACTURING A CARTON SEALED IN CARDBOARD FOR CARRYING OUT A PACKAGING FOR PACKAGING PRODUCTS |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB839580A (en) * | 1956-02-20 | 1960-06-29 | Matchall Co Aktiebolag | Improvements in a method of manufacturing boxes of cardboard |
| NL7211905A (en) * | 1972-08-31 | 1974-03-04 | ||
| SE7415580L (en) * | 1974-12-12 | 1976-06-14 | Akerlund & Rausing Ab | LAMINATE PACKAGING |
-
1977
- 1977-10-03 FR FR7729714A patent/FR2404566A1/en active Granted
-
1978
- 1978-10-02 WO PCT/FR1978/000026 patent/WO1979000170A1/en unknown
- 1978-10-02 DE DE7878900134T patent/DE2862367D1/en not_active Expired
-
1979
- 1979-04-09 EP EP19780900134 patent/EP0007944B1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2862367D1 (en) | 1984-03-01 |
| FR2404566B1 (en) | 1981-11-27 |
| EP0007944A1 (en) | 1980-02-20 |
| FR2404566A1 (en) | 1979-04-27 |
| WO1979000170A1 (en) | 1979-04-05 |
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