EP4108584A1 - Packaging with a one-piece sealing edge made from two overlapping blanks - Google Patents
Packaging with a one-piece sealing edge made from two overlapping blanks Download PDFInfo
- Publication number
- EP4108584A1 EP4108584A1 EP22179467.0A EP22179467A EP4108584A1 EP 4108584 A1 EP4108584 A1 EP 4108584A1 EP 22179467 A EP22179467 A EP 22179467A EP 4108584 A1 EP4108584 A1 EP 4108584A1
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- European Patent Office
- Prior art keywords
- packaging
- rim
- blank
- food products
- strip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- B65D5/32—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 having bodies formed by folding and interconnecting two or more blanks each blank forming a body part, whereby each body part comprises at least one outside face of the box, carton or tray
- B65D5/321—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 having bodies formed by folding and interconnecting two or more blanks each blank forming a body part, whereby each body part comprises at least one outside face of the box, carton or tray at least one container body part formed by folding up portions of a single blank connected to a central panel from all sides
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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
- B65D5/563—Laminated linings; Coatings
Definitions
- the present invention relates to a new packaging for the packaging and conservation mainly of food products, and therefore comprises a container offering an interior space or volume delimited by a bottom and a peripheral wall, and which can, if necessary, be sealed by a film. plastic closure or any other bio-sourced material sealed at the free edge of the peripheral wall and preserving the food contained in the packaging.
- the packaging of the invention is mainly made of cardboard, therefore falling within the environmental logic recommended today, which tends to replace plastic containers with cardboard configurations. It can be sealed by a film coating the inner faces of a cardboard tray forming the container of the receptacle.
- the sealing provided by the film makes it possible to use the packaging for a wide range of foodstuffs requiring storage protected from the ambient air, in particular if they are subsequently sealed.
- the packaging can be used to contain fruits and vegetables, including with a lid which is itself perforated.
- Such cardboard packaging coated with an inner plastic film has been well known for a long time, such as for example those described in the patent FR 2 975 973 , which focuses in particular on another problem related to this packaging: when sealing the container with a plastic seal closing the container, ensuring a tight connection between the flat edges that such a method of closing requires and the seal .
- Sealed packaging in fact requires first of all the existence of a peripheral rim extending the wall of the container outwards to allow and support sealing, a rim which must then be flat, failing which airtightness, when it is required , cannot be assured.
- the cardboard blank used to shape the tray in volume comprises a pan forming the bottom and tabs extending on the different sides of the bottom, each being sized to form one side of the peripheral wall and one side of the rim.
- the edges of said tabs are supposed to come into contact edge to edge with those of the contiguous tongue, so that the walls and the edges are correctly butted when laminating the plastic film on the cardboard, which gives the tray its final shape with a peripheral wall and rim that surround the entire container.
- the film which adheres to the cardboard sections forming the sides and the edges of the container therefore also has a function of maintaining the volume cohesion of the container.
- the sealing can be carried out on a support (the complete peripheral edge) whose flatness is assumed to be continuous all around the circumference of the packaging, guaranteeing a good hermeticity to the container thus closed.
- a support the complete peripheral edge
- the initial flat cardboard blank benefits from very precise cutouts of the different tabs, in particular in their parts forming the different sides of the rim.
- the flatness is no longer ensured and it becomes difficult to achieve a correct seal during sealing.
- the initial cutting of the flat blank provides areas which, at the time of three-dimensional assembly, overlap.
- the overlapping zones are also sometimes the subject of specific gluing with the aim of reinforcing the solidity of the tray, before the possible laying of the film coating the inner faces of the peripheral wall and the upper faces of the rim.
- the overlapping zones affect said peripheral rim, the latter has extra thicknesses often localized at the level of the corners of the package.
- the lidding takes place on an edge which is not flat, but which on the contrary offers areas for sealing the lid distributed over two levels.
- the pressure exerted at the time of sealing is therefore not uniform, it is obviously greater at the places where there are two thicknesses.
- the resulting seal is potentially less effective, in terms of sealing, particularly at the level of the steps separating the zones with two superimposed thicknesses from those which have only one thickness.
- the three-dimensional forming of the initially flat, pre-creased, pre-cut and folded blank with a view to its volume deployment is complex and requires specific machines to be inserted into the automated manufacturing lines. such packaging and packaging of products that slow down production rates.
- the present invention overcomes these problems and limitations, by proposing an innovative solution which not only guarantees the uniformity of the thickness of the sealing surface of the lid over the entire peripheral rim of the packaging, but also its flatness and its perfect continuity all around.
- the packaging for packaging food products of the invention conventionally comprising a cardboard container comprising a bottom, a peripheral wall and a peripheral rim
- the cardboard container is made from two blanks pre-grooved and pre-cut planes, a first blank comprising, on the one hand, the entire peripheral rim consisting of a single piece in the blank and, on the other hand, a continuous or discontinuous peripheral inner band extending the rim inwards, the band and the rim being separated by a folding crease, and a second blank comprising the bottom and the peripheral wall.
- the container is only made of cardboard, it is made from two cardboard blanks directly connected to each other and which ensure the mechanical strength of the container.
- the structure is therefore very different from that which is disclosed in the documents JP 2001 233324 , JP 2001 096644 and JP 2001 287729 in the name of DAINIPPON PRINTING CO LTD, which indeed describe a container based on two blanks, which are however connected to one another via portions which overlap and which are constantly referred to as “polymerized parts”.
- one side of the container can then be coated with a plastic film or any other bio-sourced material.
- the two blanks can be fixed to one another at the level of the inner band of the first blank, the peripheral wall falling under the second blank being placed inside said band.
- the face of the peripheral wall on which the film is applied is flat, which facilitates the coating operation.
- peripheral rim being in one piece, in other words made up of a single piece in the first blank, without division, it is therefore also completely flat and has no relief, neither positive nor negative, which could weaken or interrupt the sealing bond at the time of lidding.
- This solution without folds or joints on the edge guarantees an airtight seal which results from a completely controlled flatness.
- the tightness thus ensured allows the use of these packagings including for packaging fresh and semi-fresh foods, which must be able to be kept for several days in a controlled atmosphere and which is not altered by gas exchanges with the outside. .
- the two blanks can be fixed to each other by gluing.
- Glue dots are for example distributed over the faces of the inner strip intended to be in contact with the wall elements falling under the second blank.
- the first blank comprising the peripheral rim may have a thickness greater than the thickness of the second blank.
- the objective is to increase the mechanical strength of the rim, which is particularly exposed insofar as many manipulations of the packaging, sometimes quite heavily filled, are done in practice via the peripheral rim.
- the container of the invention is provided polyhedral, the first blank then comprising an outer polygonal strip provided to form the rim and, for each side of the polygon of the rim, at least one portion of inner strip, said strip or said inner strip portions extending over the major part of said side.
- the container has flat sides separated by edges at the places where the edges of said sides meet.
- the abutment zones concern only the peripheral wall of the container itself, and have no extension in the rim, which is in one piece and continuous according to the essential characteristic of the invention.
- the inner strip portion may preferably run over the entire interior length of said side of the rim, the strip portions attached to each side of the rim being abutted in the first blank at both strip portions connected to adjacent sides of said rim.
- the rim and the strip extending it inside together constitute a wider strip, of preferably substantially uniform width, and separated by a crease which constitutes a fold line.
- the inner strip has diagonal cutouts separating the portions of strips falling on each side of the rim, allowing folding.
- the second blank can then present on the one hand a polygonal face forming the bottom of the container, homothetic to the layout of the polygon consisting of the creasing constituting the edge connecting the edge and the band interior, and on the other hand sections forming the sides of the peripheral wall.
- the sides of the peripheral wall can for example be rectangular, for a prismatic container shape, or trapezoidal, if the container takes the shape of a truncated pyramid.
- the outer corners of the rim are preferably provided rounded for both practical and aesthetic reasons.
- the blanks can be provided in flat cardboard or micro-fluted cardboard, recyclable materials and therefore particularly sought after in current packaging.
- the peripheral walls and/or the bottom of the blank can be perforated to allow ventilation of the products.
- Said peripheral walls and the bottom of the blank can also comprise at least one printable surface, so as to be able to personalize them.
- a perforated cardboard in the configuration coated with an interior film and, in this case, the product contained in the packaging is visible through the film.
- the cardboard container of the invention is produced by means of two flat cardboard blanks 1, 2 pre-cut and pre-scored in order to constitute a single volume container as shown in figures 3 and 4 .
- the blank 1 incorporates the flange 10, drawn in one piece and, in the configuration shown, a continuous inner strip 100 which extends said flange 10 inwards.
- the blank 2 comprises the bottom 20 and four trapezoidal side panels 21, 22, 23, 24 so that on assembly, the volume of the container is a polyhedron of the truncated pyramid type with four sides.
- the blank 1 is in fact presented as a frame with four sides, the four sides 11, 12, 13, 14 of the flange 10 developing parallel to four portions 101, 102, 103, 104 of the inner band 100, from which they are separated by creases 15, 16, 17, 18 constituting fold lines and the inner edge of rim 10. Cutouts diagonals 105, 106, 107, 108 are made at the corners, notching only the strip 100 and allowing the portions 101, 102, 103, 104 of said strip 100 to be abutted at these locations.
- the sides 21, 22 of the blank 2 are of equal dimensions, as are the sides 23, 24. They are separated from the pan forming the bottom 20 by grooves 25, 26, 27, 28 forming fold lines making it possible to conform tri - dimensionally the container.
- the dimensions between said grooved fold lines 25, 26, 27, 28 and the free edges 31, 32, 33, 34 are not necessarily equal for the two pairs of sides 21, 22 on the one hand and 23, 24 on the other hand. on the other hand, even if they are close in the configuration shown in the figures. They actually depend on the inclinations of said sides 21, 22, 23, 24, which are not necessarily equal either, which themselves depend on the shape and positioning of the bottom 20.
- the volume possibilities are virtually infinite.
- each grooved folding line 25, 26, 27, 28 and its corresponding free edge 31, 32, 33, 34 corresponds to the depth of the container. It should be noted that as all the peripheral sections 21, 22, 23, 24 belong to the same blank 2, the dimension between said grooved folding lines 25, 26, 27, 28 and respectively their corresponding free edges 31, 32, 33, 34 can take on a large number of values, including high values, subject to the nature and mechanical strength of the cardboard, and of course the actual needs in terms of packaging volume.
- the two blanks 1, 2 have, in the configuration shown, a double symmetry with respect to two central axes respectively longitudinal and transverse, that is to say a symmetry with respect to a central point, which can be seen as a very special case of geometry which can obviously include many non-symmetrical variants.
- the actual depth of the container is obviously less than that which a straight prismatic configuration would have.
- the interior volume of the container is totally closed by the panels 21, 22, 23, 24 forming the sides of the peripheral wall of the packaging.
- the free edges 31, 32, 33, 34 of the sides 21, 22, 23, 24 have a length which corresponds to the length of the creases 15, 16, 17, 18 forming the fold line between the sides 11, 12, 13 , 14 of the rim 10 and the portions 101, 102, 103, 104 of the inner strip 100.
- the side edges of the panels 21, 22, 23, 24 are butted, so that the entire internal volume of the packaging is enclosed in the side walls during the final assembly in three dimensions which appears in these figures, when the parts high proximal edges of the free edges 31, 32, 33, 34 of the sections 21, 22, 23, 24 of the blank 2 are glued to the peripheral portions 101, 102, 103, 104 of the inner band 100 of the blank 1.
- glue dots 200 visible in figure 2 are placed on the portions 101, 102, 103, 104 of the inner strip 100.
- these dots of glue are arranged at regular intervals inside said portions 101, 102, 103, 104, so that the bonding takes place outside the sections 21, 22, 23, 24, as it appears in the figures 3 and 4 .
- internal filming is also carried out, when the three-dimensionally shaped blanks 1 and 2 are glued to each other.
- This filming has the effect of coating the inner face of the container with a layer of plastic or other adherent biosourced material which reinforces the volume cohesion of the container and also gives it a more airtight character.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
Emballage de conditionnement de produits alimentaires comprenant un récipient en carton comportant un fond (20), une paroi périphérique (21, 22, 23, 24) et un rebord périphérique (10).Le récipient en carton est réalisé à partir de deux flans plans (1, 2) pré-rainés et prédécoupés, un premier flan (1) comportant d'une part la totalité du rebord périphérique (10) constitué d'un seul tenant dans le flan (1) et d'autre part une bande (100) intérieure périphérique continue ou discontinue prolongeant le rebord (10) vers l'intérieur, la bande (100) et le rebord (10) étant séparés par un rainage (15, 16, 17, 18) de pliage, et un second flan (2) comportant le fond et la paroi périphérique (21, 22, 23, 24).Packaging packaging for food products comprising a cardboard container comprising a bottom (20), a peripheral wall (21, 22, 23, 24) and a peripheral rim (10). The cardboard container is made from two flat blanks (1, 2) pre-grooved and pre-cut, a first blank (1) comprising on the one hand the entire peripheral rim (10) formed in one piece in the blank (1) and on the other hand a strip ( 100) continuous or discontinuous peripheral interior extending the flange (10) inwards, the strip (100) and the flange (10) being separated by a crease (15, 16, 17, 18) for folding, and a second blank (2) comprising the bottom and the peripheral wall (21, 22, 23, 24).
Description
La présente invention concerne un nouvel emballage pour le conditionnement et la conservation principalement de produits alimentaires, et comporte dès lors un récipient offrant un espace ou volume intérieur délimité par un fond et une paroi périphérique, et qui peut le cas échéant être operculé par un film de fermeture en plastique ou en tout autre matériau bio-sourcé scellé au niveau du bord libre de la paroi périphérique et préservant les aliments contenus dans l'emballage.The present invention relates to a new packaging for the packaging and conservation mainly of food products, and therefore comprises a container offering an interior space or volume delimited by a bottom and a peripheral wall, and which can, if necessary, be sealed by a film. plastic closure or any other bio-sourced material sealed at the free edge of the peripheral wall and preserving the food contained in the packaging.
L'emballage de l'invention est principalement en carton, s'inscrivant par conséquent dans la logique environnementale préconisée de nos jours, qui tend à remplacer les conteneurs en plastique par des configurations en carton. Il peut être rendu étanche par un film revêtant les faces intérieures d'une barquette en carton formant le contenant du récipient. L'étanchéification procurée par le film permet d'utiliser l'emballage pour une large palette d'aliments nécessitant une conservation à l'abri de l'air ambiant, notamment s'ils sont ensuite operculés. A l'inverse, en l'absence d'un tel film, l'emballage peut être utilisé pour contenir des fruits et des légumes, y compris avec un opercule lui-même perforé.The packaging of the invention is mainly made of cardboard, therefore falling within the environmental logic recommended today, which tends to replace plastic containers with cardboard configurations. It can be sealed by a film coating the inner faces of a cardboard tray forming the container of the receptacle. The sealing provided by the film makes it possible to use the packaging for a wide range of foodstuffs requiring storage protected from the ambient air, in particular if they are subsequently sealed. Conversely, in the absence of such a film, the packaging can be used to contain fruits and vegetables, including with a lid which is itself perforated.
De tels emballages en cartons revêtus par un film plastique intérieur sont bien connus depuis longtemps, comme par exemple ceux qui sont décrits dans le
Dans la configuration décrite dans
Dans l'hypothèse d'un aboutement parfait des parties des rebords appartenant à chaque languette, l'operculage peut être effectué sur un support (le rebord périphérique complet) dont la planéité est supposée continue sur tout le pourtour de l'emballage, garantissant une bonne herméticité au conteneur ainsi fermé. Cela implique cependant que le flan de carton plat initial bénéficie de découpes très précises des différentes languettes, notamment dans leurs parties formant les différents côtés du rebord. En cas d'approximation dans la découpe, dès que subsiste un espace entre les pans des languettes au niveau du rebord périphérique, la planéité n'est plus assurée et il devient difficile de réaliser une étanchéité correcte lors de l'operculage.Assuming perfect abutment of the parts of the edges belonging to each tab, the sealing can be carried out on a support (the complete peripheral edge) whose flatness is assumed to be continuous all around the circumference of the packaging, guaranteeing a good hermeticity to the container thus closed. However, this implies that the initial flat cardboard blank benefits from very precise cutouts of the different tabs, in particular in their parts forming the different sides of the rim. In the event of an approximation in the cutout, as soon as a space remains between the faces of the tabs at the level of the peripheral rim, the flatness is no longer ensured and it becomes difficult to achieve a correct seal during sealing.
Dans d'autres configurations existantes de ce type d'emballages en carton, la découpe initiale du flan plan prévoit des zones qui, au moment du montage tridimensionnel, se chevauchent. Les zones de chevauchement font d'ailleurs parfois l'objet d'un collage spécifique ayant pour objectif de renforcer la solidité de la barquette, avant la pose éventuelle du film revêtant les faces intérieures de la paroi périphérique et les faces supérieures du rebord. Dans le cas où les zones de chevauchement affectent ledit rebord périphérique, celui-ci présente des surépaisseurs souvent localisées au niveau des coins de l'emballage.In other existing configurations of this type of cardboard packaging, the initial cutting of the flat blank provides areas which, at the time of three-dimensional assembly, overlap. The overlapping zones are also sometimes the subject of specific gluing with the aim of reinforcing the solidity of the tray, before the possible laying of the film coating the inner faces of the peripheral wall and the upper faces of the rim. In the case where the overlapping zones affect said peripheral rim, the latter has extra thicknesses often localized at the level of the corners of the package.
Dans ces conditions, l'operculage s'effectue sur un rebord qui n'est pas plan, mais qui offre au contraire des plages de scellage de l'opercule réparties sur deux niveaux. La pression exercée au moment du scellage n'est donc pas uniforme, elle est évidemment plus importante aux endroits où il y a deux épaisseurs. Le scellage résultant est potentiellement moins efficace, en termes d'étanchéité, tout particulièrement au niveau des marches séparant les zones à deux épaisseurs superposées de celles qui ne présentent qu'une épaisseur.Under these conditions, the lidding takes place on an edge which is not flat, but which on the contrary offers areas for sealing the lid distributed over two levels. The pressure exerted at the time of sealing is therefore not uniform, it is obviously greater at the places where there are two thicknesses. The resulting seal is potentially less effective, in terms of sealing, particularly at the level of the steps separating the zones with two superimposed thicknesses from those which have only one thickness.
En outre, dans certaines configurations connues d'emballages, le formage en trois dimensions du flan initialement plan, pré-rainé, prédécoupé et plié en vue de son déploiement volumique, est complexe et nécessite des machines spécifiques à insérer dans les lignes automatisées de fabrication de tels emballages et de conditionnement de produits qui ralentissent les cadences de production.In addition, in certain known packaging configurations, the three-dimensional forming of the initially flat, pre-creased, pre-cut and folded blank with a view to its volume deployment, is complex and requires specific machines to be inserted into the automated manufacturing lines. such packaging and packaging of products that slow down production rates.
La présente invention s'affranchit de ces problématiques et limitations, en proposant une solution innovante qui garantit non seulement l'uniformité de l'épaisseur de la surface de scellage de l'opercule sur l'ensemble du rebord périphérique de l'emballage, mais également sa planéité et sa parfaite continuité sur tout le pourtour.The present invention overcomes these problems and limitations, by proposing an innovative solution which not only guarantees the uniformity of the thickness of the sealing surface of the lid over the entire peripheral rim of the packaging, but also its flatness and its perfect continuity all around.
A ces effets, l'emballage de conditionnement de produits alimentaires de l'invention, comprenant classiquement un récipient en carton comportant un fond, une paroi périphérique et un rebord périphérique, est prévu tel que le récipient en carton est réalisé à partir de deux flans plans pré-rainés et prédécoupés, un premier flan comportant d'une part la totalité du rebord périphérique constitué d'un seul tenant dans le flan et d'autre part une bande intérieure périphérique continue ou discontinue prolongeant le rebord vers l'intérieur, la bande et le rebord étant séparés par un rainage de pliage, et un second flan comportant le fond et la paroi périphérique.For these purposes, the packaging for packaging food products of the invention, conventionally comprising a cardboard container comprising a bottom, a peripheral wall and a peripheral rim, is provided such that the cardboard container is made from two blanks pre-grooved and pre-cut planes, a first blank comprising, on the one hand, the entire peripheral rim consisting of a single piece in the blank and, on the other hand, a continuous or discontinuous peripheral inner band extending the rim inwards, the band and the rim being separated by a folding crease, and a second blank comprising the bottom and the peripheral wall.
Au sens de l'invention, pour satisfaire aux objectifs environnementaux développés auparavant, le récipient est uniquement en carton, il est constitué à partir des deux flans en carton directement reliés l'un à l'autre et qui assurent la tenue mécanique du récipient. La structure est donc très différente de celle qui est divulguée dans les documents
Pour en revenir à l'invention, selon l'usage qui en est fait, une face du récipient peut ensuite être revêtue d'un film en plastique ou en tout autre matériau bio-sourcé. Par ailleurs, s'il en est besoin, les deux flans peuvent être fixés l'un à l'autre au niveau de la bande intérieure du premier flan, la paroi périphérique relevant du second flan étant disposée à l'intérieur de ladite bande. Dans ce cas, si un film en plastique ou en tout autre matériau bio-sourcé est utilisé pour revêtir l'intérieur du récipient, la face de la paroi périphérique sur laquelle est appliqué le film est plane, ce qui facilite l'opération de revêtement.To return to the invention, depending on the use made of it, one side of the container can then be coated with a plastic film or any other bio-sourced material. Furthermore, if necessary, the two blanks can be fixed to one another at the level of the inner band of the first blank, the peripheral wall falling under the second blank being placed inside said band. In this case, if a plastic film or any other bio-sourced material is used to line the inside of the container, the face of the peripheral wall on which the film is applied is flat, which facilitates the coating operation.
Le rebord périphérique étant d'un seul tenant, autrement dit constitué d'une seule pièce dans le premier flan, sans division, il est par conséquent également complètement plan et ne comporte aucun relief, ni positif ni négatif, qui pourrait affaiblir ou interrompre la liaison de scellage au moment de l'operculage. Cette solution sans plis ni jointures sur le rebord garantit un scellage hermétique qui résulte d'une planéité complètement maîtrisée. L'étanchéité ainsi assurée permet l'utilisation de ces emballages y compris pour emballer des aliments frais et semi-frais, qui doivent pouvoir se conserver plusieurs jours dans une atmosphère contrôlée et qui n'est pas altérée par des échanges gazeux avec l'extérieur.The peripheral rim being in one piece, in other words made up of a single piece in the first blank, without division, it is therefore also completely flat and has no relief, neither positive nor negative, which could weaken or interrupt the sealing bond at the time of lidding. This solution without folds or joints on the edge guarantees an airtight seal which results from a completely controlled flatness. The tightness thus ensured allows the use of these packagings including for packaging fresh and semi-fresh foods, which must be able to be kept for several days in a controlled atmosphere and which is not altered by gas exchanges with the outside. .
Dans ce cas, il est en effet primordial de garantir un effet barrière, ce qui implique que l'opercule soit parfaitement scellé sur le rebord plan, et qu'aucune perforation n'affecte ledit film ou le filmage intérieur du récipient. A l'inverse, comme déjà mentionné, pour l'emballage par exemple des fruits et légumes, l'herméticité n'est pas requise et il est possible d'utiliser l'emballage de l'invention sans filmage interne.In this case, it is in fact essential to guarantee a barrier effect, which implies that the cover is perfectly sealed on the flat rim, and that no perforation affects said film or the internal filming of the container. Conversely, as already mentioned, for the packaging of fruit and vegetables, for example, hermeticity is not required and it is possible to use the packaging of the invention without internal filming.
De préférence, les deux flans peuvent être fixés l'un à l'autre par collage. Des points de colle sont par exemple répartis sur les faces de la bande intérieure prévues pour être au contact des éléments de paroi relevant du second flan.Preferably, the two blanks can be fixed to each other by gluing. Glue dots are for example distributed over the faces of the inner strip intended to be in contact with the wall elements falling under the second blank.
Selon l'invention, de plus, le premier flan comportant le rebord périphérique peut présenter une épaisseur supérieure à l'épaisseur du second flan. L'objectif est d'augmenter la tenue mécanique du rebord, qui est particulièrement exposé dans la mesure où de nombreuses manipulations de l'emballage, parfois assez lourdement rempli, se font en pratique via le rebord périphérique.According to the invention, moreover, the first blank comprising the peripheral rim may have a thickness greater than the thickness of the second blank. The objective is to increase the mechanical strength of the rim, which is particularly exposed insofar as many manipulations of the packaging, sometimes quite heavily filled, are done in practice via the peripheral rim.
Dans la plupart des configurations possibles, le récipient de l'invention est prévu polyédrique, le premier flan comportant alors une bande polygonale extérieure prévue pour former le rebord et, pour chaque côté du polygone du rebord, au moins une portion de bande intérieure, ladite bande ou lesdites portions de bande intérieure s'étendant sur la majeure partie dudit côté.In most of the possible configurations, the container of the invention is provided polyhedral, the first blank then comprising an outer polygonal strip provided to form the rim and, for each side of the polygon of the rim, at least one portion of inner strip, said strip or said inner strip portions extending over the major part of said side.
Dans une telle hypothèse polyédrique, le récipient comporte des côtés plans séparés par des arêtes aux endroits où les chants desdits côtés s'aboutent. Contrairement aux configurations connues, cependant, les zones d'aboutement ne concernent que la paroi périphérique du contenant proprement dit, et n'ont pas de prolongement dans le rebord, qui est d'une seule pièce et continu selon la caractéristique essentielle de l'invention.In such a polyhedral hypothesis, the container has flat sides separated by edges at the places where the edges of said sides meet. Contrary to the known configurations, however, the abutment zones concern only the peripheral wall of the container itself, and have no extension in the rim, which is in one piece and continuous according to the essential characteristic of the invention.
Plus précisément, pour chaque côté du polygone du rebord, la portion de bande intérieure peut de préférence courir sur la totalité de la longueur intérieure dudit côté du rebord, les portions de bande attachées à chaque côté du rebord étant aboutées dans le premier flan aux deux portions de bandes reliées aux côtés adjacents dudit rebord. Lorsque le premier flan est encore à l'état plan, le rebord et la bande le prolongeant à l'intérieur constituent ensemble une bande plus large, de largeur de préférence sensiblement uniforme, et séparés par un rainage qui constitue une ligne de pliage. Au niveau des coins, la bande intérieure comporte des découpes d'allure diagonale séparant les portions de bandes relevant de chaque côté du rebord, permettant le pliage.More specifically, for each side of the rim polygon, the inner strip portion may preferably run over the entire interior length of said side of the rim, the strip portions attached to each side of the rim being abutted in the first blank at both strip portions connected to adjacent sides of said rim. When the first blank is still in the flat state, the rim and the strip extending it inside together constitute a wider strip, of preferably substantially uniform width, and separated by a crease which constitutes a fold line. At the corners, the inner strip has diagonal cutouts separating the portions of strips falling on each side of the rim, allowing folding.
Dans toutes ces configurations polyédriques avec un rebord périphérique en bande polygonale, le second flan peut alors présenter d'une part un pan polygonal formant le fond du récipient, homothétique du tracé du polygone constitué du rainage constituant l'arête reliant le rebord et la bande intérieure, et d'autre part des pans formant les côtés de la paroi périphérique. Selon la forme finale donnée à l'emballage, les pans de la paroi périphérique peuvent par exemple être rectangulaires, pour une forme de récipient prismatique, ou trapézoïdaux, si le contenant prend la forme d'un tronc de pyramide.In all these polyhedral configurations with a peripheral edge in a polygonal band, the second blank can then present on the one hand a polygonal face forming the bottom of the container, homothetic to the layout of the polygon consisting of the creasing constituting the edge connecting the edge and the band interior, and on the other hand sections forming the sides of the peripheral wall. Depending on the final shape given to the packaging, the sides of the peripheral wall can for example be rectangular, for a prismatic container shape, or trapezoidal, if the container takes the shape of a truncated pyramid.
Il est à noter que la structure particulière des emballages de l'invention obtenus à partir de deux flans telle que décrite auparavant permet de réaliser des formes très diverses, incluant des parois périphériques à pans coupés, ce qui n'est pas possible dans la plupart des configurations existantes. Ces pans coupés permettent d'utiliser une moindre épaisseur de matière, la tension dans les coins étant réduite.It should be noted that the particular structure of the packaging of the invention obtained from two blanks as described above makes it possible to produce very diverse shapes, including peripheral walls with canted sides, which is not possible in most existing configurations. These canted sides make it possible to use less thickness of material, the tension in the corners being reduced.
Les coins extérieurs du rebord sont de préférence prévus arrondis pour des raisons tant pratiques qu'esthétiques.The outer corners of the rim are preferably provided rounded for both practical and aesthetic reasons.
Dans la plupart des configurations, les flans peuvent être prévus en carton plat ou en carton micro-cannelé, matériaux recyclables et par conséquent particulièrement recherchés dans les emballages actuels.In most configurations, the blanks can be provided in flat cardboard or micro-fluted cardboard, recyclable materials and therefore particularly sought after in current packaging.
Selon des options possibles, les parois périphériques et/ou le fond du flan peuvent être ajourés pour permettre une aération des produits. Lesdites parois périphériques et le fond du flan peuvent également comporter au moins une surface imprimable, de manière à pouvoir les personnaliser. Il est à noter qu'il est aussi possible d'avoir un carton ajouré dans la configuration revêtue d'un film intérieur et, dans ce cas, le produit contenu dans l'emballage est visible à travers le film.According to possible options, the peripheral walls and/or the bottom of the blank can be perforated to allow ventilation of the products. Said peripheral walls and the bottom of the blank can also comprise at least one printable surface, so as to be able to personalize them. It should be noted that it is also possible to have a perforated cardboard in the configuration coated with an interior film and, in this case, the product contained in the packaging is visible through the film.
D'autres buts et avantages de la présente invention apparaîtront au cours de la description qui va suivre, se rapportant à des modes de réalisation qui ne sont donnés qu'à titre d'exemples indicatifs. La compréhension de cette description sera en particulier facilitée en référence aux dessins joints en annexe et dans lesquels :
- La
figure 1 représente une vue d'une configuration possible de récipient d'allure rectangulaire selon la présente invention, réalisé à partir de deux flans montrés à plat ; - La
figure 2 montre les deux mêmes flans en cours de conformation tridimensionnelle en vue de l'obtention du récipient monté ; - La
figure 3 illustre l'apparence du récipient en carton de l'emballage lorsque les flans sont assemblés à l'état volumique, avant maintien de l'ensemble tridimensionnel par collage des flans, avec vue dans l'intérieur du récipient ; et - La
figure 4 montre le récipient dans le même état volumique que dans la figure précédente, mais en vue de l'extérieur, récipient renversé avec le fond en premier plan.
- The
figure 1 shows a view of a possible configuration of a rectangular container according to the present invention, made from two blanks shown flat; - The
figure 2 shows the same two blanks undergoing three-dimensional conformation with a view to obtaining the assembled container; - The
picture 3 illustrates the appearance of the cardboard container of the packaging when the blanks are assembled in the volume state, before maintaining the three-dimensional assembly by gluing the blanks, with a view inside the container; and - The
figure 4 shows the container in the same volumetric state as in the previous figure, but seen from the outside, container upside down with the bottom in the foreground.
En référence à la
Le flan 1 se présente de fait comme un cadre à quatre côtés, les quatre côtés 11, 12, 13, 14 du rebord 10 se développant parallèlement à quatre portions 101, 102, 103, 104 de la bande intérieure 100, dont ils sont séparés par des rainages 15, 16, 17, 18 constituant des lignes de pliage et l'arête intérieure du rebord 10. Des découpes diagonales 105, 106, 107, 108 sont pratiquées au niveau des coins, entaillant uniquement la bande 100 et permettant aux portions 101, 102, 103, 104 de ladite bande 100 d'être aboutées à ces emplacements.The blank 1 is in fact presented as a frame with four sides, the four
Les côtés 21, 22 du flan 2 sont de dimensions égales, de même que les côtés 23, 24. Ils sont séparés du pan formant le fond 20 par des rainages 25, 26, 27, 28 formant des lignes de pliage permettant de conformer tri-dimensionnellement le contenant. Les dimensions entre lesdites lignes de pliage rainées 25, 26, 27, 28 et les chants libres 31, 32, 33, 34 ne sont pas nécessairement égales pour les deux paires de côtés 21, 22 d'une part et 23, 24 d'autre part, même si elles sont proches dans la configuration montrée dans les figures. Elles dépendent en réalité des inclinaisons desdits côtés 21, 22, 23, 24, qui ne sont pas non plus forcément égales, qui dépendent elles-mêmes de la forme et du positionnement du fond 20. Les possibilités volumiques sont virtuellement infinies.The
Les dimensions et inclinaisons de ces côtés 21, 22, 23, 24 contribuent en pratique à l'établissement de la profondeur du récipient lorsque le montage volumique est effectué. Si le volume du récipient est prismatique droit, c'est-à-dire avec des angles droits partout, la dimension séparant chaque ligne de pliage rainée 25, 26, 27, 28 et son chant libre correspondant 31, 32, 33, 34 correspond à la profondeur du contenant. Il est à noter que comme tous les pans périphériques 21, 22, 23, 24 relèvent du même flan 2, la dimension entre lesdites lignes de pliage rainées 25, 26, 27, 28 et respectivement leurs chants libres correspondants 31, 32, 33, 34 peut prendre un grand nombre de valeurs, y compris des valeurs élevées, sous réserve de la nature et de la tenue mécanique du carton, et bien entendu des besoins réels en volume d'emballage.The dimensions and inclinations of these
Les deux flans 1, 2 présentent, dans la configuration représentée, une double symétrie par rapport à deux axes centraux respectivement longitudinal et transversal, c'est-à-dire une symétrie par rapport à un point central, ce qui peut être vu comme un cas très particulier de géométrie qui peut évidemment comporter de nombreuses variantes non symétriques.The two
Dans le cas présent d'un tronc de pyramide, la profondeur réelle du récipient est évidemment moindre que celle qu'aurait une configuration prismatique droite. Dans la configuration particulière représentée, le volume intérieur du récipient est totalement fermé par les pans 21, 22, 23, 24 formant les côtés de la paroi périphérique de l'emballage. Ainsi, les chants libres 31, 32, 33, 34 des pans 21, 22, 23, 24 présentent une longueur qui correspond à la longueur des rainages 15, 16, 17, 18 formant ligne de pliage entre les côtés 11, 12, 13, 14 du rebord 10 et les portions 101, 102, 103, 104 de la bande intérieure 100. En référence aux
Pour permettre le maintien en forme de la structure tridimensionnelle, des points de colle 200 visibles en
Optionnellement, un filmage intérieur est de plus effectué, lorsque les flans 1 et 2 conformés tri-dimensionnellement sont collés l'un à l'autre. Ce filmage a pour effet de revêtir la face interne du récipient par une couche en plastique ou en autre matériau biosourcé adhérente qui renforce la cohésion volumique du récipient et lui confère de plus un caractère plus étanche.Optionally, internal filming is also carried out, when the three-dimensionally shaped
L'exemple de configuration qui fait l'objet des figures ne doit pas être considéré comme exhaustif de l'invention, qui englobe au contraire les variantes de forme auquel on a fait allusion auparavant : formes et angles d'inclinaison des pans 21, 22, 23, 24 ; nombre de portions de la bande 100 intérieure par côté 11, 12, 13, 14 ; existence ou non de pans coupés, etc.The configuration example which is the subject of the figures should not be considered as exhaustive of the invention, which on the contrary encompasses the shape variants to which reference has been made previously: shapes and angles of inclination of the
Claims (13)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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FR2106618A FR3124172B1 (en) | 2021-06-22 | 2021-06-22 | One-piece sealing edge packaging made from two overlapping blanks |
Publications (1)
Publication Number | Publication Date |
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EP4108584A1 true EP4108584A1 (en) | 2022-12-28 |
Family
ID=76807895
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP22179467.0A Pending EP4108584A1 (en) | 2021-06-22 | 2022-06-16 | Packaging with a one-piece sealing edge made from two overlapping blanks |
Country Status (2)
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EP (1) | EP4108584A1 (en) |
FR (1) | FR3124172B1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001096644A (en) | 1999-09-29 | 2001-04-10 | Dainippon Printing Co Ltd | Method for manufacturing container made of paper |
JP2001233324A (en) | 2000-02-22 | 2001-08-28 | Dainippon Printing Co Ltd | Paper-made container |
JP2001287729A (en) | 2000-04-06 | 2001-10-16 | Dainippon Printing Co Ltd | Paper container |
FR2975973A1 (en) | 2011-05-30 | 2012-12-07 | Formkraft | Waterproof cardboard tray for packaging products i.e. foodstuffs, has plastic film applied on inner face of cardboard sheet for connecting and maintaining central portion, tabs, cutouts, and peripheral edges in waterproof manner |
-
2021
- 2021-06-22 FR FR2106618A patent/FR3124172B1/en active Active
-
2022
- 2022-06-16 EP EP22179467.0A patent/EP4108584A1/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001096644A (en) | 1999-09-29 | 2001-04-10 | Dainippon Printing Co Ltd | Method for manufacturing container made of paper |
JP2001233324A (en) | 2000-02-22 | 2001-08-28 | Dainippon Printing Co Ltd | Paper-made container |
JP2001287729A (en) | 2000-04-06 | 2001-10-16 | Dainippon Printing Co Ltd | Paper container |
FR2975973A1 (en) | 2011-05-30 | 2012-12-07 | Formkraft | Waterproof cardboard tray for packaging products i.e. foodstuffs, has plastic film applied on inner face of cardboard sheet for connecting and maintaining central portion, tabs, cutouts, and peripheral edges in waterproof manner |
Also Published As
Publication number | Publication date |
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FR3124172A1 (en) | 2022-12-23 |
FR3124172B1 (en) | 2023-12-01 |
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