EP0865995B1 - Thermoplastic packaging item, manufacture and use thereof - Google Patents

Thermoplastic packaging item, manufacture and use thereof Download PDF

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Publication number
EP0865995B1
EP0865995B1 EP19980400598 EP98400598A EP0865995B1 EP 0865995 B1 EP0865995 B1 EP 0865995B1 EP 19980400598 EP19980400598 EP 19980400598 EP 98400598 A EP98400598 A EP 98400598A EP 0865995 B1 EP0865995 B1 EP 0865995B1
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EP
European Patent Office
Prior art keywords
sheet
deformation
peripheral
packaging
male
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EP19980400598
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German (de)
French (fr)
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EP0865995A1 (en
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Laurent Aubry
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Individual
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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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by associating or interconnecting two or more sheets or blanks
    • B65D75/30—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
    • B65D75/32—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents
    • 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by associating or interconnecting two or more sheets or blanks
    • B65D75/30—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
    • B65D75/32—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents
    • B65D75/321—Both sheets being recessed
    • B65D75/322—Both sheets being recessed and forming one compartment

Definitions

  • the invention relates to a packaging article made of plastic for packaging products various while allowing their visual presentation, this article being characterized by the difficulty of ensuring the opening once it has been sealed, and therefore by its relative inviolability.
  • the invention also relates to the manufacture of this item and its use for packaging and the presentation of various objects.
  • the packaging may also contain a notice advertising or employment, visible or not from the outside.
  • Another reason for wrapping objects relatively inviolable is to prevent customers from easily removed from their packaging, which can lead to deterioration or loss of all or part of the parts contained in the packaging.
  • packaging made of generally transparent, relatively rigid thermoplastic, and made up of two superimposed sheets of such matter, interconnected at their periphery, for example by high frequency welding, and which trap the objects to present to the consumer.
  • one sheets, or both sheets are shaped so to marry at least roughly the shape of the object to wrap, for example a photographic film, a pair of scissors, a light bulb or any other object.
  • This guy packaging often called a "blister”, usually presents a good degree of inviolability, higher than that obtained by laminating or tight-fitting packaging, i.e. by deposit of the object on a sheet of cardboard or the like and covering of the whole by a sheet of plastic material, or by heat sealing, that is to say sealing a thermoformed shell on a cardboard support.
  • the aforementioned packaging relatively inviolable, formed by two sheets of transparent plastic relatively rigid, heat-sealed at their periphery, are relatively expensive to produce, because they require a large workforce and the use of welding machines which are not always available to the user, namely the packaging company that will put the objects to protect in their packaging and then close this one.
  • peripheral deformations are U-shaped, which does not allow assembly by simple interlocking, assembly is done by combined application of heat and pressure or by use of adhesive.
  • peripheral deformations of the sheet which includes a deformation intended to receive the object to be wrapped and the other sheet make sense opposite to the direction of the deformation intended to receive the object to be packaged, which facilitates, once assembly of the two sheets produced, entering the deformations of opposite directions of the leaves with both hands and therefore facilitates disassembly, opposite result to that sought by the invention.
  • the sheet intended to receive the object to be packaged has deformations of opposite directions, one to receive the object and the other (peripheral) intended for closure, it is not possible for its manufacture to use a totally "positive" matrix whose advantage is be able to easily adapt to the particular shape of the object to be packaged, as will be explained later.
  • An object of the present invention is to provide both inexpensive and relatively tamper-proof packaging and which do not require specialized equipment for their sealing.
  • the objective is in particular to produce packaging which cannot be opened easily by the only use of fingers, so that the wrapped object cannot not be easily removed from its packaging and stolen or simply deteriorated.
  • These packages may contain utility items, such as those mentioned above, or food of all kinds, fertilizers, chemical agents intended for industry, agriculture or domestic uses, without this list being exhaustive.
  • Another aspect of the invention relates to manufacturing, by thermoforming sheets or strips of material thermoplastic, preferably transparent, parts constituting the packaging article of the invention.
  • This manufacturing must be inexpensive and the mold of thermoforming must easily adapt to the modification of shape of the object to be wrapped, in order to avoid having to create a mold for each particular object or each dimension of the same object.
  • thermoplastic material thickness any material relatively low thermoplastic material thickness, whatever its extent. This therefore includes in particular sheets, strips, low plates thickness.
  • the angle at the base of the inverted truncated cone, relative to the portion of the sheet of thermoplastic material undeformed neighbor will be most often between 60 and 89 degrees, preferably between 75 and 85 degrees.
  • the sheets should therefore be relatively rigid but nevertheless have some flexibility to allow assembly operations.
  • the (or) deformation (s) intended to receive the object or objects to be packaged is (are) only performed on the female leaf and its (their) orientation is the same direction with respect to said sheet that the peripheral deformation of this leaf.
  • the other sheet (male) has no deformation other than peripheral deformation and does not present therefore no irregularity allowing to enter it with the fingers to try to disassemble the two leaves, one once the assembly has been completed.
  • the deformation peripheral is carried out over the entire periphery of each of the two sheets and the sheets only have no significant protruding part beyond the deformation device to avoid that we can enter 'such protruding parts and exert an increased effort which would lead at the unwanted opening of the assembly once that it has been realized.
  • This embodiment can usefully be combined with the previous one (male leaf without finger points).
  • the wall of the deformation outermost male leaf peripheral wall which will be called return wall, is more shorter than the wall of said innermost deformation (the most central) so as to enclose the extreme edge of the male leaf inside the peripheral deformation of the female leaf and to increase the difficulty of the grab.
  • thermoplastic material can be of any kind provided that it is suitable for the thermoforming technique. It could be, for example, PVC (polychloride vinyl), polystyrene, polypropylene or the like. We prefers a transparent material, which allows better visualization the object enclosed in the packaging, that a material translucent or even an opaque material. Matter is not necessarily the same for both sheets, and this presents of particular interest when the two subjects do not not weld by usual welding methods such as high frequency welding. This is therefore an advantage additional of the invention.
  • At least the sheet which receives the intended deformation to receive the object or objects to be packaged is manufactured by positive thermoforming, i.e. using a plate with raised, not recessed, motif (also called profile later) intended to create the deformation leaf device.
  • a mass of removable conformation which can easily be changed to take the approximate shape of each object you want pack, for example a cylindrical or semi-cylindrical shape if it is a photo film, a general form a pair of scissors, an eraser, a watch strap, a tool such as a screwdriver, hammer, etc.
  • the outermost wall of the deformation male leaf device is cut more short than the corresponding wall of the peripheral deformation of the female leaf, so, as indicated previously, that it is more difficult to grasp the edge in the relatively narrow space of the entry of the deformation peripheral.
  • positive relief is meant that the relief is protrusion above the plate, as opposed to a relief negative in which the relief is hollow relative to the surface of the plate.
  • FIG 1 shows in perspective an article packaging according to the invention, before its assembly.
  • the thermoformed "female” sheet has a portion substantially flat, not deformed 1, peripheral deformation 2 in elevation over the entire periphery of the sheet which is here rectangular but which could have any other shape, such as circular or polygonal.
  • 2a, 2b, 2c, 2d the four lateral portions of this deformation.
  • 3 a portion in elevation which is the deformation intended to receive the object to be packaged (during filling it is more convenient to turn the female sheet over so that the deformation 3 can receive the object, the way of a cut, without risk of falling of the object).
  • the "male” leaf also has a substantially plane 4, not deformed, which preferably occupies the whole of the space between the peripheral deformations. Through elsewhere it includes a peripheral deformation 5a, 5b, 5c, 5d substantially identical to that of the female leaf and intended to come to engage in this last deformation when closing.
  • Both sheets may have facing perforations such as 12 and 12 'intended for the attachment of the article on a display in the shape of a horizontal rod.
  • Figures 2a and 2c show in enlarged section an embodiment of the peripheral deformations corresponding, for example 2b and 5b (the demonstration would be the same for the other sides of the article which correspond and are intended to fit together).
  • FIG. 3a represents an assembly in which the shape of the peripheral deformation, seen in section, is substantially more rounded, which facilitates nesting.
  • FIG. 3a represents an assembly in which the shape of the peripheral deformation, seen in section, is substantially more rounded, which facilitates nesting.
  • peripheral deformations 2 and 5 have little different dimensions, the lower border deformation of the male leaf may not fully penetrate the deformation of the female leaf, which is a disadvantage because it can help to unseal the article.
  • the outer wall of the sheet deformation male is noticeably shorter than that of the leaf female, so as not to overflow and, better, not to appear at the insertion slot. It's clear that the same arrangement can be made whatever the form of peripheral deformation.
  • Figures 4a and 4b show in cross section along X 1 X 2 and X 3 X 4 respectively the female and male sheets.
  • Figure 5 shows by way of example a plate thermoforming the female sheet, for example of metal, the flat part of which is designated by 6. It comprises in elevation a profile (pattern) generally designated by 7 which can take any appropriate form to create the desired peripheral deformation of the thermoplastic sheets.
  • the profile is inverted frustoconical section, wider at the top 8 than at the base (not shown). 9 designates the wall of this profile.
  • This plate also has a shaping mass 10, preferably removable, adapted to the shape of the deformation 3 that we want to create. Mass 10 can be easily replaced by a mass of different conformation which will create the female receptacle intended to receive other types of objects.
  • Figure 6 shows a thermoforming plate of the male leaf, the flat part of which is designated by 6 ′. It has in elevation a profile (pattern) designated by 7 ' and who will, if he must cooperate with the profile 7 of the figure 5, the same general shape but dimensions slightly lower for the reasons stated above. We find the top 8 'and the wall 9' of the profile.

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  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)

Description

L'invention concerne un article d'emballage en matière plastique permettant le conditionnement de produits divers tout en permettant leur présentation visuelle, cet article étant caractérisé par la difficulté d'en assurer l'ouverture une fois qu'il a été scellé, et donc par sa relative inviolabilité. L'invention concerne également la fabrication de cet article et son utilisation pour le conditionnement et la présentation d'objets divers.The invention relates to a packaging article made of plastic for packaging products various while allowing their visual presentation, this article being characterized by the difficulty of ensuring the opening once it has been sealed, and therefore by its relative inviolability. The invention also relates to the manufacture of this item and its use for packaging and the presentation of various objects.

On sait que le vol d'objets dans le commerce, et notamment dans les grandes surfaces, est source de pertes financières pour les exploitants de ces commerces. Le vol est encore plus facile lorsqu'il s'agit d'articles de petites dimensions qui peuvent être aisément dissimulés.We know that the theft of objects in commerce, and in particular in supermarkets, is a source of financial losses for the operators of these businesses. The flight is even easier when it comes to small items dimensions that can be easily hidden.

Les commerçants se sont donc orientés vers des emballages en matière plastique transparente, relativement difficiles à ouvrir et souvent de plus grande taille que l'objet à protéger. L'emballage peut également renfermer une notice publicitaire ou d'emploi, visible ou non de l'extérieur.Traders therefore turned to packaging made of transparent plastic, relatively difficult to open and often larger than the object to protect. The packaging may also contain a notice advertising or employment, visible or not from the outside.

Un autre motif d'emballage des objets de manière relativement inviolable est d'éviter que la clientèle ne les sorte aisément de leur emballage, ce qui peut conduire à la détérioration ou à la perte de tout ou partie des pièces contenues dans l'emballage. Another reason for wrapping objects relatively inviolable is to prevent customers from easily removed from their packaging, which can lead to deterioration or loss of all or part of the parts contained in the packaging.

On connaít déjà des emballages réalisés en matière thermoplastique généralement transparente, relativement rigide, et constitués de deux feuilles superposées d'une telle matière, reliées entre elles à leur périphérie, par exemple par soudage haute fréquence, et qui emprisonnent le ou les objets à présenter au consommateur. Dans certains cas, l'une des feuilles, ou les deux feuilles, sont conformées de manière à épouser au moins grossièrement la forme de l'objet à envelopper, par exemple un film photographique, une paire de ciseaux, une ampoule électrique ou tout autre objet. Ce type d'emballage, souvent appelé "blister", présente habituellement un bon degré d'inviolabilité, supérieur à celui obtenu par pelliplacage ou emballage moulant, c'est-à-dire par dépôt de l'objet sur une feuille de carton ou analogue et recouvrement de l'ensemble par une feuille de matière plastique, ou encore par thermoscellage, c'est-à-dire scellage d'une coque thermoformée sur un support de carton.We already know packaging made of generally transparent, relatively rigid thermoplastic, and made up of two superimposed sheets of such matter, interconnected at their periphery, for example by high frequency welding, and which trap the objects to present to the consumer. In some cases, one sheets, or both sheets, are shaped so to marry at least roughly the shape of the object to wrap, for example a photographic film, a pair of scissors, a light bulb or any other object. This guy packaging, often called a "blister", usually presents a good degree of inviolability, higher than that obtained by laminating or tight-fitting packaging, i.e. by deposit of the object on a sheet of cardboard or the like and covering of the whole by a sheet of plastic material, or by heat sealing, that is to say sealing a thermoformed shell on a cardboard support.

Les emballages précités, relativement inviolables, formés par deux feuilles de matière plastique transparente relativement rigide, thermosoudées à leur périphérie, sont relativement coûteux à produire, du fait qu'ils nécessitent une main-d'oeuvre importante et l'emploi de machines de soudure qui ne sont pas toujours disponibles chez l'utilisateur, à savoir l'entreprise d'emballage qui va mettre les objets à protéger dans leur emballage et fermer ensuite celui-ci. The aforementioned packaging, relatively inviolable, formed by two sheets of transparent plastic relatively rigid, heat-sealed at their periphery, are relatively expensive to produce, because they require a large workforce and the use of welding machines which are not always available to the user, namely the packaging company that will put the objects to protect in their packaging and then close this one.

Le document US-A-3 650 386 décrit un article d'emballage, destiné à être ouvert puis refermé plusieurs fois, comprenant deux feuilles assemblables en matière thermoplastique, de préférence transparente, relativement rigide, comprenant :

  • a) une première feuille, ou feuille femelle, en ladite matière relativement rigide, qui est conformée pour avoir sur la totalité de sa périphérie une déformation elle-même relativement rigide en forme de canal,
  • et b) une seconde feuille ou feuille mâle en ladite matière relativement rigide qui est conformée pour avoir sur la totalité de sa périphérie une déformation elle-même relativement rigide, en forme de canal, ladite déformation étant, par rapport à la déformation de la première feuille, de même forme générale que celle-ci et de dimensions plus faibles.
    • Document US-A-3 650 386 describes a packaging article, intended to be opened and then closed several times, comprising two sheets which can be assembled in thermoplastic material, preferably transparent, relatively rigid, comprising:
  • a) a first sheet, or female sheet, of said relatively rigid material, which is shaped to have over its entire periphery a deformation which is itself relatively rigid in the form of a channel,
  • and b) a second sheet or male sheet of said relatively rigid material which is shaped so as to have, over its entire periphery, a deformation which is itself relatively rigid, in the form of a channel, said deformation being, relative to the deformation of the first sheet, of the same general shape as this one and of smaller dimensions.

    • Dans ce document, les déformations périphériques sont en forme de U, ce qui ne permet pas un assemblage par simple enclanchement, l'assemblage se faisant par application combinée de chaleur et de pression ou par emploi d'adhésif. De plus les déformations périphériques de la feuille qui comporte une déformation destinée à recevoir l'objet à emballer et de l'autre feuille sont de sens opposé au sens de la déformation destinée à recevoir l'objet à emballer, ce qui facilite, une fois l'assemblage des deux feuilles réalisé, la saisie des déformations de sens opposés des feuilles avec les deux mains et donc facilite le desassemblage, résultat opposé à celui recherché par l'invention. Enfin, compte-tenu du fait que la feuille destinée à recevoir l'objet à emballer possède des déformations de sens opposés, l'une pour recevoir l'objet et l'autre (périphérique) destinée à la fermeture, il n'est pas possible pour sa fabrication d'utiliser une matrice totalement "en positif" dont l'avantage est de pouvoir s'adapter facilement à la forme particulière de l'objet à emballer, comme il sera expliqué plus loin.In this document, the peripheral deformations are U-shaped, which does not allow assembly by simple interlocking, assembly is done by combined application of heat and pressure or by use of adhesive. In addition, the peripheral deformations of the sheet which includes a deformation intended to receive the object to be wrapped and the other sheet make sense opposite to the direction of the deformation intended to receive the object to be packaged, which facilitates, once assembly of the two sheets produced, entering the deformations of opposite directions of the leaves with both hands and therefore facilitates disassembly, opposite result to that sought by the invention. Finally, given the fact that the sheet intended to receive the object to be packaged has deformations of opposite directions, one to receive the object and the other (peripheral) intended for closure, it is not possible for its manufacture to use a totally "positive" matrix whose advantage is be able to easily adapt to the particular shape of the object to be packaged, as will be explained later.

    Un objet de la présente invention est de réaliser des emballages à la fois bon marché et relativement inviolables et qui ne nécessitent pas d'appareillage spécialisé pour leur scellage. L'objectif est notamment de réaliser des emballages qui ne puissent pas être ouverts aisément par le seul usage des doigts, afin que l'objet emballé ne puisse pas être facilement sorti de son emballage et volé ou simplement détérioré.An object of the present invention is to provide both inexpensive and relatively tamper-proof packaging and which do not require specialized equipment for their sealing. The objective is in particular to produce packaging which cannot be opened easily by the only use of fingers, so that the wrapped object cannot not be easily removed from its packaging and stolen or simply deteriorated.

    Ces emballages peuvent renfermer des objets utilitaires, tels que ceux mentionnés plus haut, ou bien des aliments de toutes sortes, des engrais, des agents chimiques destinés à l'industrie, à l'agriculture ou aux usages domestiques, sans que cette liste soit limitative.These packages may contain utility items, such as those mentioned above, or food of all kinds, fertilizers, chemical agents intended for industry, agriculture or domestic uses, without this list being exhaustive.

    Un autre aspect de l'invention est relatif à la fabrication, par thermoformage de feuilles ou bandes de matière thermoplastique, de préférence transparente, des pièces constitutives de l'article d'emballage de l'invention. Cette fabrication doit être peu coûteuse et le moule de thermoformage doit s'adapter aisément à la modification de forme de l'objet à emballer, afin d'éviter d'avoir à créer un moule pour chaque objet particulier ou chaque dimension d'un même objet.Another aspect of the invention relates to manufacturing, by thermoforming sheets or strips of material thermoplastic, preferably transparent, parts constituting the packaging article of the invention. This manufacturing must be inexpensive and the mold of thermoforming must easily adapt to the modification of shape of the object to be wrapped, in order to avoid having to create a mold for each particular object or each dimension of the same object.

    Par feuille, dans ce qui suit, on entend tout matériau en matière thermoplastique de relativement faible épaisseur, quelle que soit son étendue. Cela inclut donc notamment les feuilles, les bandes, les plaques de faible épaisseur. By sheet, in what follows, we mean any material relatively low thermoplastic material thickness, whatever its extent. This therefore includes in particular sheets, strips, low plates thickness.

    La présente invention concerne un article d'emballage relativement inviolable comprenant deux feuilles assemblables en matière thermoplastique, de préférence transparente, relativement rigide, comprenant :.

  • a) une première feuille, ou feuille femelle (1), en ladite matière relativement rigide, qui est conformée pour avoir sur la totalité de sa périphérie une déformation elle-même relativement rigide en forme de canal (2),
  • et b) une seconde feuille, ou feuille mâle (4), en ladite matière relativement rigide qui est conformée pour avoir sur la totalité de sa périphérie une déformation elle-même relativement rigide, en forme de canal (5), ladite déformation étant, par rapport à la déformation de la première feuille, de même forme générale que celle-ci et de dimensions plus faibles,
    • caractérisé en ce que les déformations périphériques de la feuille femelle et de la feuille mâle sont plus étroites à leur entrée qu'en au moins une autre zone située plus profondément, les dimensions de la déformation de la feuille mâle étant toutefois suffisantes pour que, lorsqu'on amène la feuille mâle sous la feuille femelle, on soit obligé d'exercer un effort notable pour faire pénétrer la déformation périphérique de la feuille mâle dans la déformation périphérique de la feuille femelle et qu'après cet effort la déformation périphérique de la feuille mâle soit fermement maintenue dans la déformation périphérique de la feuille femelle, la feuille femelle présentant en outre au moins une autre déformation (3) dans une zone non périphérique et non contiguë à la déformation périphérique, orientée dans le même sens par rapport à ladite feuille femelle que la déformation périphérique de cette feuille et destinée à recevoir le ou les objets à emballer, tandis que la feuille mâle ne comporte aucune déformation autre que sa déformation périphérique. The present invention relates to a relatively inviolable packaging article comprising two sheets of thermoplastic material, preferably transparent, relatively rigid, comprising:
  • a) a first sheet, or female sheet (1), of said relatively rigid material, which is shaped so as to have over its entire periphery a deformation which is itself relatively rigid in the form of a channel (2),
  • and b) a second sheet, or male sheet (4), of said relatively rigid material which is shaped to have, over its entire periphery, a deformation which is itself relatively rigid, in the form of a channel (5), said deformation being, with respect to the deformation of the first sheet, of the same general shape as the latter and of smaller dimensions,
    • characterized in that the peripheral deformations of the female sheet and of the male sheet are narrower at their entry than in at least one other zone situated more deeply, the dimensions of the deformation of the male sheet being however sufficient so that, when '' we bring the male sheet under the female sheet, we are forced to exert a notable effort to penetrate the peripheral deformation of the male sheet into the peripheral deformation of the female sheet and that after this effort the peripheral deformation of the sheet male is firmly held in the peripheral deformation of the female sheet, the female sheet further having at least one other deformation (3) in a non-peripheral area and not contiguous to the peripheral deformation, oriented in the same direction relative to said sheet female as the peripheral deformation of this leaf and intended to receive the ob or ob jets to be packaged, while the male sheet has no deformation other than its peripheral deformation.

    Il est clair que plus la matière des feuilles sera rigide et/ou épaisse, ou encore plus la différence de largeur entre l'entrée de la déformation périphérique et une autre zone plus large située plus profondément de ladite déformation périphérique sera grande, et plus il sera difficile de faire pénétrer la déformation périphérique de la deuxième feuille dans celle de la première feuille et plus il sera difficile ensuite de désassembler les deux feuilles. Un compromis devra donc être trouvé dans chaque cas, tel que l'effort à exercer lors du scellement ne soit pas excessif mais soit cependant suffisant pour un bon maintien, et donc une bonne inviolabilité de l'assemblage. Dans le cas par exemple où la déformation périphérique prend la forme d'un tronc de cône inversé, en règle générale, et sous réserve de ce qui précède, l'angle à la base du tronc de cône inversé, par rapport à la portion de la feuille de matière thermoplastique non déformée voisine, se situera le plus souvent entre 60 et 89 degrés, de préférence entre 75 et 85 degrés.It is clear that the more the material of the leaves will be rigid and / or thick, or even more the difference in width between the input of the peripheral deformation and a other wider area located deeper from said deformation the bigger the device, the harder it will be to penetrate the peripheral deformation of the second sheet in that of the first sheet and more then it will be difficult to disassemble the two sheets. A compromise must therefore be found in each case, such as the effort to be exerted during the sealing is not excessive but is however sufficient for a good maintenance, and therefore good inviolability of the assembly. In the case by example where the peripheral deformation takes the form of a inverted truncated cone, as a rule, and subject to the above, the angle at the base of the inverted truncated cone, relative to the portion of the sheet of thermoplastic material undeformed neighbor, will be most often between 60 and 89 degrees, preferably between 75 and 85 degrees.

    Les feuilles devront donc être relativement rigides mais néanmoins posséder une certaine souplesse pour permettre les opérations d'assemblage.The sheets should therefore be relatively rigid but nevertheless have some flexibility to allow assembly operations.

    Les formes de réalisation indiquées ci-après sont données à titre illustratif et peuvent être mises en oeuvre séparément ou en combinaison.The embodiments indicated below are given for illustrative purposes and can be used separately or in combination.

    Dans une forme de réalisation préférée, la (ou les) déformation(s) destinée(s) à recevoir le ou les objets à emballer n'est (ne sont) réalisée(s) que sur la feuille femelle et son (leur) orientation est de même sens par rapport à ladite feuille que la déformation périphérique de cette feuille. L'autre feuille (mâle) ne comporte aucune déformation autre que la déformation périphérique et ne présente donc aucune irrégularité permettant de la saisir avec les doigts pour tenter de désassembler les deux feuilles, une fois l'assemblage réalisé.In a preferred embodiment, the (or) deformation (s) intended to receive the object or objects to be packaged is (are) only performed on the female leaf and its (their) orientation is the same direction with respect to said sheet that the peripheral deformation of this leaf. The other sheet (male) has no deformation other than peripheral deformation and does not present therefore no irregularity allowing to enter it with the fingers to try to disassemble the two leaves, one once the assembly has been completed.

    Dans une autre réalisation préférée, la déformation périphérique est réalisée sur la totalité de la périphérie de chacune des deux feuilles et les feuilles ne comportent aucune partie débordante notable au-delà de la déformation périphérique afin d'éviter qu'on puisse saisir de' telles parties débordantes et exercer un effort accru qui conduirait à l'ouverture indésirable de l'assemblage une fois qu'il a été réalisé. Cette forme de réalisation peut utilement être combinée à la précédente (feuille mâle dépourvue de points de saisie par les doigts).In another preferred embodiment, the deformation peripheral is carried out over the entire periphery of each of the two sheets and the sheets only have no significant protruding part beyond the deformation device to avoid that we can enter 'such protruding parts and exert an increased effort which would lead at the unwanted opening of the assembly once that it has been realized. This embodiment can usefully be combined with the previous one (male leaf without finger points).

    Pour permettre l'accrochage de l'article emballé sur une tige de présentoir, ou autre support, on peut avoir une perforation commune des deux feuilles dans une zone autre que les zones de déformation destinées, d'une part, à l'assemblage et, d'autre part, à recevoir le ou les objets à présenter.To allow hanging of the wrapped article on a display rod, or other support, we can have a joint perforation of the two sheets in another area that the deformation zones intended, on the one hand, for assembly and, on the other hand, to receive the object or objects to present.

    Selon une autre variante préférée, la paroi de la déformation périphérique de la feuille mâle la plus extérieure, paroi que l'on appellera paroi de retour, est plus courte que la paroi de ladite déformation la plus intérieure (la plus centrale) de façon à enfermer le rebord extrême de la feuille mâle à l'intérieur de la déformation périphérique de la feuille femelle et à accroítre la difficulté de la saisir.According to another preferred variant, the wall of the deformation outermost male leaf peripheral, wall which will be called return wall, is more shorter than the wall of said innermost deformation (the most central) so as to enclose the extreme edge of the male leaf inside the peripheral deformation of the female leaf and to increase the difficulty of the grab.

    Dans une autre forme de réalisation, et pour accroítre encore le degré d'inviolabilité de l'article d'emballage, on dispose au fond de la déformation périphérique de la feuille femelle et/ou à la surface externe de la déformation périphérique de la feuille mâle un agent d'adhésion éventuellement protégé par une feuille de papier ou autre matière aisément décollable. Avant scellement des deux feuilles, en cas d'emploi d'une feuille protectrice, on enlève cette feuille protectrice et on procède à l'assemblage.In another embodiment, and to increase still the degree of inviolability of the packaging article, we have at the bottom of the peripheral deformation of the female leaf and / or the external surface of the deformation male leaf device an adhesion agent possibly protected by a sheet of paper or other easily removable material. Before sealing both sheets, if a protective sheet is used, remove this protective sheet and we proceed to assembly.

    La matière thermoplastique peut être de nature quelconque pourvu qu'elle soit adaptée à la technique du thermoformage. Ce pourra être, par exemple, du PVC (polychlorure de vinyle), du polystyrène, du polypropylène ou analogue. On préfère une matière transparente, qui permet de mieux visualiser l'objet enfermé dans l'emballage, qu'une matière translucide ou même une matière opaque. La matière n'est pas nécessairement la même pour les deux feuilles, et cela présente un intérêt particulier lorsque les deux matières ne se soudent pas par les méthodes usuelles de soudage telles que le soudage haute fréquence. Cela constitue donc un avantage supplémentaire de l'invention.The thermoplastic material can be of any kind provided that it is suitable for the thermoforming technique. It could be, for example, PVC (polychloride vinyl), polystyrene, polypropylene or the like. We prefers a transparent material, which allows better visualization the object enclosed in the packaging, that a material translucent or even an opaque material. Matter is not necessarily the same for both sheets, and this presents of particular interest when the two subjects do not not weld by usual welding methods such as high frequency welding. This is therefore an advantage additional of the invention.

    Un autre aspect important de l'invention est celui relatif au procédé de fabrication des feuilles conformées, à savoir la feuille femelle et la feuille mâle. Selon l'invention, au moins la feuille qui reçoit la déformation destinée à recevoir le ou les objets à emballer est fabriquée par thermoformage positif, c'est-à-dire avec utilisation d'une platine comportant en relief, et non en creux, le motif (aussi appelé profilé par la suite) destiné à créer la déformation périphérique de la feuille. Il suffit d'ajouter, dans la partie non périphérique de la platine, une masse de conformation amovible qui pourra aisément être changée pour prendre la forme approximative de chaque objet que l'on désire emballer, par exemple une forme cylindrique ou hémi-cylindrique s'il s'agit d'un film photo, une forme générale d'une paire de ciseaux, d'une gomme, d'un bracelet-montre, d'un outil tel que tournevis, marteau, etc.Another important aspect of the invention is that relating to the process for manufacturing shaped sheets, know the female leaf and the male leaf. According to the invention, at least the sheet which receives the intended deformation to receive the object or objects to be packaged is manufactured by positive thermoforming, i.e. using a plate with raised, not recessed, motif (also called profile later) intended to create the deformation leaf device. Just add, in the non-peripheral part of the plate, a mass of removable conformation which can easily be changed to take the approximate shape of each object you want pack, for example a cylindrical or semi-cylindrical shape if it is a photo film, a general form a pair of scissors, an eraser, a watch strap, a tool such as a screwdriver, hammer, etc.

    Le procédé de fabrication des feuilles conformées comprendra les étapes suivantes :

  • A) thermoformage d'une première feuille d'emballage en matière thermoplastique relativement rigide à l'aide d'une platine de thermoformage sensiblement plane comportant, en relief positif, (a) un motif de même forme générale que la déformation périphérique souhaitée pour ladite première feuille, à savoir un motif plus étroit à sa base qu'en au moins une autre zone située plus haut, destiné à créer ladite déformation périphérique, et (b), à l'intérieur du motif (a), un motif de configuration amovible destiné à créer la déformation destinée au logement des objets à emballer, de façon à former une feuille femelle,
  • B) thermoformage d'une seconde feuille d'emballage en matière thermoplastique relativement rigide à l'aide d'une platine de thermoformage sensiblement plane comportant un motif de même forme générale que le motif (a) et de dimensions plus faibles mais dont la partie la plus large est cependant plus large que la base du motif (a), afin qu'un effort notable soit nécessaire pour faire pénétrer la déformation périphérique de la seconde feuille d'emballage thermoformée dans la déformation périphérique de la première feuille d'emballage thermoformée, ceci de façon à former une feuille mâle.
    • The manufacturing process for shaped sheets will include the following steps:
  • A) thermoforming of a first packaging sheet of relatively rigid thermoplastic material using a substantially flat thermoforming plate comprising, in positive relief, (a) a pattern of the same general shape as the desired peripheral deformation for said first sheet, namely a pattern narrower at its base than at least one other zone located higher, intended to create said peripheral deformation, and (b), inside the pattern (a), a pattern of configuration removable intended to create the deformation intended to house the objects to be packaged, so as to form a female sheet,
  • B) thermoforming of a second packaging sheet of relatively rigid thermoplastic material using a substantially flat thermoforming plate comprising a pattern of the same general shape as the pattern (a) and of smaller dimensions but of which the part the widest is however wider than the base of the pattern (a), so that a significant effort is necessary to penetrate the peripheral deformation of the second thermoformed packaging sheet into the peripheral deformation of the first thermoformed packaging sheet , this so as to form a male leaf.

    • Dans le cas où l'on souhaite que l'objet se trouve en partie dans un logement de la première feuille et en partie dans un logement complémentaire correspondant de la deuxième feuille, on pourra utiliser, pour la deuxième platine un motif positif pour l'une des déformations (celle de la déformation périphérique ou celle de logement de l'objet) et un motif négatif pour l'autre. On atoutefois constaté, dans ce cas, qu'il était plus avantageux de réaliser le motif destiné à créer le logement complémentaire en positif et le motif destiné à créer la déformation périphérique en négatif, en utilisant toutefois, de préférence, une plus grande épaisseur de la matière thermoplastique,

  • C) découpage de la première et de -la deuxième feuilles thermoformées en éliminant toute portion de feuille extérieure à la déformation périphérique. Simultanément on peut percer un orifice destiné à suspendre l'article sur un présentoir.
    • In the case where it is desired that the object is partly in a housing of the first sheet and partly in a corresponding complementary housing of the second sheet, a positive pattern may be used for the second plate. one of the deformations (that of the peripheral deformation or that of housing of the object) and a negative reason for the other. However, in this case, it was found that it was more advantageous to produce the pattern intended to create the complementary housing in positive and the pattern intended to create the peripheral deformation in negative, however, preferably using a greater thickness of thermoplastic material,
  • C) cutting of the first and second thermoformed sheets by eliminating any portion of sheet outside of the peripheral deformation. Simultaneously one can drill a hole intended to suspend the article on a display.

    • De préférence la paroi la plus extérieure de la déformation périphérique de la feuille mâle est découpée plus courte que la paroi correspondante de la déformation périphérique de la feuille femelle, afin, comme on l'a indiqué précédemment, qu'il soit plus difficile d'en saisir le rebord dans l'espace relativement étroit de l'entrée de la déformation périphérique.Preferably the outermost wall of the deformation male leaf device is cut more short than the corresponding wall of the peripheral deformation of the female leaf, so, as indicated previously, that it is more difficult to grasp the edge in the relatively narrow space of the entry of the deformation peripheral.

    Par relief positif on entend que le relief fait saillie au-dessus de la platine, par opposition à un relief négatif dans lequel le relief est en creux par rapport à la surface de la platine.By positive relief is meant that the relief is protrusion above the plate, as opposed to a relief negative in which the relief is hollow relative to the surface of the plate.

    Les figures 1 à 7, données à titre d'exemples, illustrent l'invention sans vouloir la limiter en aucune façon.Figures 1 to 7, given as examples, illustrate the invention without wishing to limit it in any way.

    La figure 1 représente en perspective un article d'emballage selon l'invention, avant son assemblage. La feuille "femelle" thermoformée comporte une portion sensiblement plane, non déformée 1, une déformation périphérique 2 en élévation sur toute la périphérie de la feuille qui est ici rectangulaire mais qui pourrait avoir toute autre forme, telle que circulaire ou polygonale. On a désigné par 2a, 2b, 2c, 2d les quatre portions latérales de cette déformation. On a représenté par 3 une portion en élévation qui est la déformation destinée à recevoir l'objet à emballer (lors du remplissage il est plus pratique de retourner la feuille femelle afin que la déformation 3 puisse recevoir l'objet, à la manière d'une coupe, sans risque de chute de l'objet). La feuille "mâle" comporte également une portion sensiblement plane 4, non déformée, qui occupe de préférence la totalité de l'espace situé entre les déformations périphériques. Par ailleurs elle comporte une déformation périphérique 5a, 5b, 5c, 5d sensiblement identique à celle de la feuille femelle et destinée à venir s'engager dans cette dernière déformation lors de la fermeture. On pourra profiter du remplissage pour insérer aussi une notice publicitaire ou informative. Les deux feuilles peuvent comporter des perforations en regard telles que 12 et 12' destinées à l'accrochage de l'article sur un présentoir en forme de tige horizontale.Figure 1 shows in perspective an article packaging according to the invention, before its assembly. The thermoformed "female" sheet has a portion substantially flat, not deformed 1, peripheral deformation 2 in elevation over the entire periphery of the sheet which is here rectangular but which could have any other shape, such as circular or polygonal. We have designated by 2a, 2b, 2c, 2d the four lateral portions of this deformation. We have represented by 3 a portion in elevation which is the deformation intended to receive the object to be packaged (during filling it is more convenient to turn the female sheet over so that the deformation 3 can receive the object, the way of a cut, without risk of falling of the object). The "male" leaf also has a substantially plane 4, not deformed, which preferably occupies the whole of the space between the peripheral deformations. Through elsewhere it includes a peripheral deformation 5a, 5b, 5c, 5d substantially identical to that of the female leaf and intended to come to engage in this last deformation when closing. We can take advantage of the filling to also insert an advertising or informative notice. Both sheets may have facing perforations such as 12 and 12 'intended for the attachment of the article on a display in the shape of a horizontal rod.

    Les figures 2a et 2c représentent en coupe agrandie un mode de réalisation des déformations périphériques correspondantes, par exemple 2b et 5b (la démonstration serait la même pour les autres côtés de l'article qui se correspondent et sont destinés à s'emboíter). Avant assemblage, on amène la feuille mâle 4 avec sa déformation périphérique 5b sous la feuille femelle 1, et après avoir chargé l'objet à emballer dans la partie 3 correspondante, on force la déformation périphérique 5b dans la déformation périphérique 2b en écartant l'entrée de celle-ci pour forcer le passage. Simultanément on engage les autres déformations, sur les autres côtés, de la feuille mâle dans les déformations correspondantes de la feuille femelle. Après enclenchement on a la disposition de la figure 2b.Figures 2a and 2c show in enlarged section an embodiment of the peripheral deformations corresponding, for example 2b and 5b (the demonstration would be the same for the other sides of the article which correspond and are intended to fit together). Before assembly, we bring the male sheet 4 with its peripheral deformation 5b under the female sheet 1, and after having loaded the object to be wrapped in the corresponding part 3, we force the deformation peripheral 5b in peripheral deformation 2b by removing the entry thereof to force the passage. Simultaneously one engages the other deformations, on the other sides, of the male leaf in the corresponding deformations of the female leaf. After switching on we have the arrangement of Figure 2b.

    La figure 3a représente un assemblage dans lequel la forme de la déformation périphérique, vue en coupe, est sensiblement plus arrondie, ce qui facilite l'emboítement. On préfère toutefois la disposition en tronc de cône inversé des figures 2a et 2b en raison de sa meilleure inviolabilité.FIG. 3a represents an assembly in which the shape of the peripheral deformation, seen in section, is substantially more rounded, which facilitates nesting. We however prefer the inverted truncated cone arrangement Figures 2a and 2b due to its better inviolability.

    On remarque que si les déformations périphériques 2 et 5 ont des dimensions peu différentes, la bordure inférieure de la déformation de la feuille mâle pourra ne pas pénétrer entièrement dans la déformation de la feuille femelle, ce qui constitue un inconvénient car cela peut aider à desceller l'article. On préfère donc, comme sur la figure 3b, que la paroi externe de la déformation de la feuille mâle soit sensiblement plus courte que celle de la feuille femelle, de façon à ne pas déborder et, mieux, à ne pas apparaítre au niveau de la fente d'introduction. Il est clair que la même disposition peut être prise quelle que soit la forme de la déformation périphérique. Note that if the peripheral deformations 2 and 5 have little different dimensions, the lower border deformation of the male leaf may not fully penetrate the deformation of the female leaf, which is a disadvantage because it can help to unseal the article. So we prefer, as in the figure 3b, that the outer wall of the sheet deformation male is noticeably shorter than that of the leaf female, so as not to overflow and, better, not to appear at the insertion slot. It's clear that the same arrangement can be made whatever the form of peripheral deformation.

    Les figures 4a et 4b représentent en coupe transversale selon X1X2 et X3X4 respectivement les feuilles femelle et mâle.Figures 4a and 4b show in cross section along X 1 X 2 and X 3 X 4 respectively the female and male sheets.

    La figure 5 représente à titre d'exemple une platine de thermoformage de la feuille femelle, par exemple en métal, dont la partie plane est désignée par 6. Elle comporte en élévation un profilé (motif) désigné de manière générale par 7 qui peut prendre toute forme appropriée pour créer la déformation périphérique souhaitée des feuilles thermoplastiques. Dans le cas des figures 1, 2 et 4, le profilé est de section tronconique inversée, plus large au sommet 8 qu'à la base (non représentée). 9 désigne la paroi de ce profilé. Cette platine comporte en outre une masse de conformation 10, de préférence amovible, adaptée à la forme de la déformation 3 que l'on souhaite créer. La masse 10 peut être aisément remplacée par une masse de conformation différente qui permettra de créer le réceptacle femelle destiné à recevoir d'autres types d'objets.Figure 5 shows by way of example a plate thermoforming the female sheet, for example of metal, the flat part of which is designated by 6. It comprises in elevation a profile (pattern) generally designated by 7 which can take any appropriate form to create the desired peripheral deformation of the thermoplastic sheets. In the case of Figures 1, 2 and 4, the profile is inverted frustoconical section, wider at the top 8 than at the base (not shown). 9 designates the wall of this profile. This plate also has a shaping mass 10, preferably removable, adapted to the shape of the deformation 3 that we want to create. Mass 10 can be easily replaced by a mass of different conformation which will create the female receptacle intended to receive other types of objects.

    La figure 6 représente une platine de thermoformage de la feuille mâle dont la partie plane est désignée par 6'. Elle comporte en élévation un profilé (motif) désigné par 7' et qui aura, s'il doit coopérer avec le profilé 7 de la figure 5, la même forme générale mais des dimensions légèrement plus faibles pour les raisons indiquées précédemment. On retrouve le sommet 8' et la paroi 9' du profilé.Figure 6 shows a thermoforming plate of the male leaf, the flat part of which is designated by 6 ′. It has in elevation a profile (pattern) designated by 7 ' and who will, if he must cooperate with the profile 7 of the figure 5, the same general shape but dimensions slightly lower for the reasons stated above. We find the top 8 'and the wall 9' of the profile.

    De nombreuses autres variantes peuvent être apportées à l'invention, et par exemple le fait d'avoir une déformation périphérique dont les deux parois (externe et interne) n'ont pas la même forme ou la même orientation, sous réserve du maintien d'une zone élargie dans au moins une partie de cette déformation au-delà de son entrée.Many other variations can be made to the invention, and for example the fact of having a deformation peripheral with two walls (external and internal) do not have the same shape or orientation, provided maintaining an enlarged area in at least part of this deformation beyond its entry.

    Par exemple, si l'on veut encore renforcer l'assemblage on pourra prévoir deux (ou plus) déformations périphériques successives sur les deux feuilles, le périmètre de la seconde étant supérieur à celui de la première. On aura donc un double enclenchement et une sécurité renforcée. For example, if we want to further strengthen the assembly we can foresee two (or more) peripheral deformations successive on the two sheets, the perimeter of the second being greater than that of the first. So we will have double engagement and enhanced security.

    Lorsqu'on désire que la paroi externe de la déformation de la feuille mâle soit plus courte que celle de la feuille femelle, on pourra avoir pour le profilé 7' de la platine destiné à la feuille mâle la forme dessinée à la figure 7. Le découpage pourra se faire ensuite au niveau du point 11.When it is desired that the external wall of the deformation of the male leaf is shorter than that of the female sheet, we can have for the 7 'profile of the platinum intended for the male leaf the shape drawn in the figure 7. The cutting can then be done at the point 11.

    Claims (12)

    1. Relatively secure packaging item comprising two adjustable sheets of relatively rigid, preferably clear, thermoplastic material, comprising
      a/ a first sheet, or female sheet (1), of said relatively rigid material, which is conformed to have a relatively rigid deformation in the shape of a channel (2) over the whole of its periphery, and
      b/ a second sheet, or male sheet (4), of said relatively rigid material, which is conformed to have a relatively rigid deformation in the shape of a channel (5) over the whole of its periphery, said deformation being of same general shape as the deformation of the first sheet, although of reduced size, characterized in that the peripheral deformations of the female sheet and of the male sheet are narrower at their inlet than in any other zone located more deeply, the size of the deformation of the male sheet being however sufficient to necessitate a substantial effort to engage the peripheral deformation of the male sheet into the peripheral deformation of the female sheet, when placing the male sheet under the female sheet, in order that after this effort the peripheral deformation of the male sheet be firmly maintained within the peripheral deformation of the female sheet, the female sheet also comprising an other deformation (3) in a non-peripheral zone not contiguous to the peripheral deformation thereof, oriented in the same direction as the peripheral deformation of said female sheet and adapted to receive at least one item to be packaged, whereas the male sheet does not comprise any other deformation than its own peripheral deformation.
    2. Packaging item according to claim 1, wherein the sheets do not comprise any substantial protruding portion beyond said peripheral deformations.
    3. Packaging item according to any one of claims 1 and 2, wherein the utmost external wall of the peripheral deformation of the male sheet ( return wall ) is shorter than the utmost internal wall of said peripheral deformation in order that the utmost rim of the male sheet be enclosed within the peripheral deformation of the female sheet to thereby increase the difficulty to grasp it.
    4. Packaging item according to claim 3, wherein the utmost external wall of the peripheral deformation of the male sheet is shorter than the corresponding wall of the peripheral deformation of the female sheet.
    5. Packaging item according to any one of claims 1 to 4, wherein the cross-section of the peripheral deformation of each sheet is shaped as an inverted frustum of a cone, the angle at the base thereof, with respect to the contiguous undeformed portion of sheet, is comprised between 60 and 89 degrees, preferably between 75 and 85 degrees.
    6. Packaging item according to any one of claims 1 to 5, wherein the two sheets have a common perforation for hanging of the item, in a zone other than the deformation zones to be used for assembling, on the one hand, and for receiving the item(s) to be presented, on the other hand.
    7. Packaging item according to any one of claims 1 to 6, wherein an adhesive agent is provided at the bottom of the peripheral deformation of the female sheet and/or at the external surface of the peripheral deformation of the male sheet.
    8. A process for manufacturing a packaging item according to any one of claims 1 to 7, by thermoforming of packaging sheets of relatively rigid thermoplastic material, characterized by the following steps :
      A/ thermoforming a first packaging sheet of relatively rigid thermoplastic material on a substantially flat thermoforming plate (6) comprising, in positive relief, (a) a pattern (7) of same general shape as the peripheral deformation desired for said first sheet, and (b), within pattern (a), a movable conformation pattern (10) for creating the deformation designed for lodging the items to be packaged, in order to form a female sheet,
      B/ thermoforming a second packaging sheet of relatively rigid thermoplastic material on a substantially flat thermoforming plate (6') comprising a pattern (7') of same general shape as the pattern (a) and of lower size, the wider portion thereof being however wider than the base of the pattern (a), in order that a substantial effort be necessary to engage the peripheral deformation of the second thermoformed packaging sheet into the peripheral deformation of the first thermoformed packaging sheet, to thereby form a male sheet comprising no other deformation than the peripheral deformation thereof.
    9. Process according to claim 8, further comprising :
      C/ cutting the first and second thermoformed sheets to eliminate any portion of sheet external to the peripheral deformation thereof.
    10. Process according to claim 9, wherein the cutting is so performed that the utmost external wall of the peripheral deformation of the male sheet is shorter than the corresponding wall of the peripheral deformation of the female sheet.
    11. The use of a packaging item according to any one of claims 1 to 7 or manufactured according to the process of any one of claims 8 to 10 to package one or several items for presentation thereof.
    12. Packaging item in assembly form, obtained by engaging the peripheral deformation of the male sheet of the packaging item of one of claims 1 to 7 into the peripheral deformation of the female sheet of said item.
    EP19980400598 1997-03-18 1998-03-13 Thermoplastic packaging item, manufacture and use thereof Expired - Lifetime EP0865995B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9703284 1997-03-18
    FR9703284A FR2761053B1 (en) 1997-03-18 1997-03-18 PACKAGING ARTICLE OF RELATIVELY INVIOLABLE THERMOPLASTIC MATERIAL, ITS MANUFACTURE AND USE

    Publications (2)

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    EP0865995A1 EP0865995A1 (en) 1998-09-23
    EP0865995B1 true EP0865995B1 (en) 2000-01-26

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    EP (1) EP0865995B1 (en)
    DE (1) DE69800071D1 (en)
    FR (1) FR2761053B1 (en)

    Family Cites Families (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US2798631A (en) * 1955-03-07 1957-07-09 Engel David Container
    US3833742A (en) * 1969-01-23 1974-09-03 Eckrich Peter & Sons Food product package
    US3650386A (en) * 1969-08-19 1972-03-21 Dow Chemical Co Resealable container
    GB9324837D0 (en) * 1993-12-03 1994-01-19 Rockingham Products Limited Packaging for an elongate flexible member

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    FR2761053B1 (en) 1999-04-30
    EP0865995A1 (en) 1998-09-23
    DE69800071D1 (en) 2000-03-02

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