EP2230190B1 - Membrane seal provided with a pull tab for sealing a container - Google Patents

Membrane seal provided with a pull tab for sealing a container Download PDF

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Publication number
EP2230190B1
EP2230190B1 EP20100305268 EP10305268A EP2230190B1 EP 2230190 B1 EP2230190 B1 EP 2230190B1 EP 20100305268 EP20100305268 EP 20100305268 EP 10305268 A EP10305268 A EP 10305268A EP 2230190 B1 EP2230190 B1 EP 2230190B1
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EP
European Patent Office
Prior art keywords
lid
strip
film
sealing
reinforcing film
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.)
Active
Application number
EP20100305268
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German (de)
French (fr)
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EP2230190A1 (en
Inventor
Stéphane Triquet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Manufacture Generale de Joints SAS
Original Assignee
Manufacture Generale de Joints SAS
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Publication date
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Publication of EP2230190A1 publication Critical patent/EP2230190A1/en
Application granted granted Critical
Publication of EP2230190B1 publication Critical patent/EP2230190B1/en
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Classifications

    • 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
    • B65D53/00—Sealing or packing elements; Sealings formed by liquid or plastics material
    • B65D53/04—Discs
    • 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
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04—Threaded or like caps or cap-like covers secured by rotation
    • B65D41/0435—Threaded or like caps or cap-like covers secured by rotation with separate sealing elements
    • B65D41/045—Discs
    • 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
    • B65D53/00—Sealing or packing elements; Sealings formed by liquid or plastics material
    • B65D53/08—Flexible adhesive strips adapted to seal filling or discharging apertures
    • 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
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0006—Upper closure
    • B65D2251/0015—Upper closure of the 41-type
    • 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
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0068—Lower closure
    • B65D2251/0093—Membrane

Definitions

  • the subject of the invention is a perforated lid on part of its thickness and provided with a tear-off tab, said lid being intended for closing a container. It also relates to a seal consisting of said seal associated with a support. Finally, it relates to a container of the rigid or flexible bottle type provided with the seal or seal.
  • the majority of the devices of the type sprinkler today on the market are in the form of a container having on the rim, a grid or a perforated plate, rigid, made of plastic, which is attached or is an integral part of the container .
  • the grid is usually covered by a cap or capsule, depending on the type of packaging. In some cases, for reasons of conservation of the content, the grid or plate is covered with a film, which is removed permanently from the first use.
  • This type of sprinklers remains relatively expensive to produce and does not give any satisfaction, especially with respect to the tightness of the grid at the level of the rim.
  • US Patent 5513781 discloses a lid according to the preamble of claim 1 and comprising an upper layer and a lower layer provided with perforations, the layers being completely separable from each other. The contents of the container then becomes sensitive to moisture, especially in the event that the lid is not immediately replaced.
  • the document EP0040797 describes a joint associating a support and a cover.
  • the lid has holes in its thickness closed by the presence of a peelable film just covering the surface of the orifice.
  • the problem to be solved by the invention is that of developing a new type of sprinkler that responds to the problem of tightness, especially at the level of the rim, and whose production cost is limited.
  • the Applicant had the idea to propose a cap, the upper layer is solid and peelable and the lower layer is provided with perforations and / or pre-drilled holes, the lower and upper layers being connected by a hinge , allowing, if necessary, not to resort to the presence of a capsule or a stopper.
  • the seal may be associated with a support to form a seal.
  • the invention relates to a seal for sealing a container, for example of the sprinkler type, comprising a sealant film having, throughout its thickness, one or more perforations and / or one or more pre-drilled holes on which is applied at least one reinforcing film devoid of perforations and / or pre-drilled holes and provided with an extension constituting a pull tab, the sealing film and the reinforcing film being secured to one another by means of an adhesive so that the reinforcing film can be partly separated from the sealing film at the time of tearing by the tongue.
  • the invention is characterized in that the portion of the lid provided with the tongue is provided on its underside, opposite the area at which the tongue is located, an adhesive prohibiting the final separation of the upper and lower parts of the lid thus forming a hinge, the remaining part of the lower face, in particular the periphery, being provided with a repositionable adhesive.
  • the adhesive located opposite the tongue acts as a hinge, the presence of repositionable adhesive at the periphery, to reposition the upper part of the lid on the lower part after use.
  • the container will be closed by means of a simple seal and may be used as a sprinkler or the like, depending on the nature of the perforation (s) and / or pre-drilled holes.
  • the tongue is constituted by an extension formed in the thickness of the reinforcing film.
  • the portion of the lid extending by a tongue may consist of one or more reinforcing films depending on the thickness of said film, so that the film of reinforcement does not tear at the time of pulling.
  • the tongue is formed over the entire thickness of the portion of the cap without perforations and / or pre-drilled holes. Indeed, when the upper part of the lid consists of two reinforcing films, the tongue may be formed at one or other of the two reinforcing films.
  • the reinforcing films provided with the tongue are 2 in number, respectively an upper reinforcing film and a lower reinforcing film, an impression being applied between the two films.
  • the material constituting the tongue and therefore the reinforcing film will be selected so that the resistance of said material is greater than that of the pulling force of the lid.
  • the reinforcing film is, for example, a biaxially oriented polyester film with a thickness of between 4 and 40 ⁇ m, in practice from 10 to 15 ⁇ m.
  • the lid is heat-sealable by induction.
  • a sheet made of a dielectric material in practice, an aluminum sheet with a thickness advantageously between 10 and 50 ⁇ m, of the order of example of 20 microns
  • the sheet made of a dielectric material is itself covered with at least one reinforcing film.
  • the sheet made of a conductive material is separated from the reinforcing film mentioned above by a foam having a thickness of between 0.4 and 4 mm, advantageously of the order of 1 mm, of density between 50 and 500 kg / m 3 , advantageously of the order of 250 kg / m 3 .
  • the foam is in practice a polyolefin foam.
  • the seal presents, between the sealing film and the aluminum foil, again a reinforcing film.
  • the lower part of the cover that is to say the unfitted portion of the tongue, has one or more perforations and / or a or several predrilled holes depending on the desired applications. In the case of a single perforation, this one will not exceed the internal diameter of the rim of the container.
  • the embodiment in which the lower part of the lid, in practice the assembly between the aluminum sheet and the sealing film is provided with pre-drilled holes is particularly advantageous for giving the container a tamper-proof character. Indeed, the first tearing of the upper part of the lid by means of the tongue will cause that of the materials constituting the pre-drilled holes, in this case the assembly aluminum / sealing film.
  • this embodiment allows to prohibit the contact between the container of the container and the adhesive applied to the underside of the reinforcing film provided with the tongue during storage. It is the same in case of reclosing the container, when the upper part of the lid is repositionable. Indeed, once the upper part of the cover repositioned on the lower part, the holes formed at the time of tearing, will be filled again by the material remained glued to the underside of the reinforcing film constituting the part top of the operculum.
  • the lower part of the lid (without tab) and comprising the sealing film and the upper part of the lid comprising the reinforcing film provided with a tongue are secured to one another. other by means of an adhesive so that the reinforcing film can partly be separated from the sealing film at the time of tearing by means of the tongue.
  • the coextruded film is a polymer-based film, generally synthetic, and judiciously chosen by those skilled in the art, so as to obtain the desired properties of differential bonding.
  • polymers are, for example, polymers or co-polymers based on acetate, acrylate, polyethylene, etc.
  • the upper part of the lid is repositionable on the lower part after partial tearing.
  • the part of the lid provided with the tongue is provided on its lower face, at the opposite of the zone at which the tongue is located, with an adhesive prohibiting the definitive separation of the upper and lower parts of the lid thus forming a hinge, the the remaining part of the lower face, in particular the periphery, being provided with a repositionable adhesive.
  • the adhesive located opposite the tongue acts as a hinge, the presence of repositionable adhesive at the periphery, to reposition the upper part of the lid on the lower part after use.
  • the repositionable adhesive can be applied over the entire lower surface of the upper part of the lid, with the exception of the "hinge".
  • the adhesive is chosen to allow the repositioning of the upper element on the lower element after partial separation of the two elements.
  • the person skilled in the art will know how to choose the appropriate composition.
  • the lower part of the lid is provided with perforations, whatever the nature of the adhesive, it is advantageously applied to the lower face of the upper element, to the non-perforated zones. perforations so as to avoid contact between the glue and the contents of the container.
  • the heat-sealing film is made of a material chosen from the group comprising polyethylene, polypropylene or polyester.
  • each of the other constituent layers of the cap are made integral with each other by means of conventional binders.
  • said lid may be manufactured in at least two distinct ways.
  • the reinforcing film may be assembled on the constituent reinforcing film of the upper part of the lid.
  • the preforms are then made in the thickness of the reinforcing film associated with the reinforcing film constituting the upper part of the cover and in the thickness of the aluminum assembly / heat-sealing film.
  • the lower part of the lid contains, in addition to the aluminum foil, a foam, as described above.
  • the preforms are made in the thickness of the complex.
  • a device of the sprinkler type is generally covered with a cap or a capsule.
  • the seal of the invention may be temporarily associated with a support to form a seal, preferably heat sealable.
  • the operculum will thus have several roles. One of them will be to confer inviolability of the container before the first opening. In addition, it will ensure primary sealing vis-à-vis the outside. Finally and above all, it will behave after tearing off the tongue and therefore partially from the upper element, like a sprinkler.
  • the support meanwhile, is intended to absorb the tolerances between the bottom of the capsule and / or the cap and the upper part of the neck of the container, and in addition, to ensure secondary sealing when the lid has been totally or partially removed. It is therefore likely to provide some compression with memory effect to precisely allow to absorb these tolerances.
  • the seal is inserted at the bottom of the capsule or cap. Once the container is filled, it comes to screw or clip the cap or the capsule with the seal on the container. The seal portion of the seal is then in contact with the rim. The sealing of the lid on the rim is then performed by induction heat sealing. This heat sealing is made possible by the combined action of a conductive material, inserted in the thickness of the seal, which, under the effect of an electric induction is heated, causing the softening of the sealing film on the rim.
  • the conductive material may be inserted either into the support or into the lid. Most often, it is inserted into the thickness of the lid.
  • the entire tongue surface is folded over the face of the cap in contact with the corresponding face of the support.
  • the support may be made of any type of compressible material with recovery memory, in particular expanded polyethylene or expanded polypropylene, optionally provided on at least one of its two faces, with a polypropylene film or polyethylene to give it a certain rigidity. It can also be made of cardboard. In practice, the supports envisaged have a thickness of between 0.5 and 4 mm, advantageously between 1 and 2 mm.
  • the temporary connection between the support and the cover this can be obtained by means of a temporary adhesive applied punctually to a multitude of points, for example microcrystalline wax or, advantageously by means of a movie extruded such as a polymer such as polyethylene.
  • the adhesive film may also be a coextruded film, each of which has a different sticking power on both sides, the most sticky face being applied to the lower surface of the support, for example, while the less tacky face is applied to the surface. upper face of the lid.
  • the coextruded film is a polymer-based film, generally synthetic, and judiciously chosen by those skilled in the art, so as to obtain the desired properties of differential bonding.
  • Such polymers are, for example, polymers or co-polymers based on acetate, acrylate, polyethylene, etc.
  • the adhesive must be chosen so that the assembly force between the support and the cover is lower than that of the heat-sealing layer on the rim.
  • the subject of the invention is also a method for manufacturing the heat-sealable seals described above.
  • the operculum of the invention has two essential elements respectively an upper element (2) and a lower element (3).
  • the upper element advantageously consists of two reinforcing films (4, 5) in the extension of which is a tab (6) tearing.
  • the lower element is characterized in that it is provided with pre-drilled holes (7) (see figure 2 ) arranged in all its thickness. It is constituted from top to bottom, a reinforcing film (8), a polyolefin foam (9), an aluminum foil (10), a second reinforcing film (11) and finally a sealing layer (12).
  • the upper and lower elements are assembled by means of an adhesive preventing the definitive separation of the upper and lower parts of the cover thus forming a hinge, the remaining part of the lower face, in particular the periphery, being provided with an adhesive repositionable.
  • the figure 4 schematically represents a dusting device according to the invention. It comprises a container (13) on the rim (14) of which is applied the lid (1). At the first use, the upper element (2) is torn off in part by gripping the tongue (6). Due to the presence of the preperforations (7), the constituent material of the lower part of the lid remains stuck on the underside of the reinforcing film. When the upper part (2) is repositioned on the lower part (3), the material returns to take its place, that is to say that the orifices left free after tearing are again rebouched.
  • FIG 3 there is shown an induction heat-sealable joint (15) associating a support (16) and the cover (1).
  • the support is made of expanded polypropylene or polyethylene and has a thickness of between 1.4 and 1.7 mm.
  • the tongue (6) is turned over and in contact with the underside of the support (16).
  • the support is associated with the lid by means of a temporary adhesive corresponding to an extruded film of the polyethylene type (17).
  • these seals are positioned as such at the bottom of the cap, the cap is then screwed or clipped, as appropriate, on the neck of the container. Heat sealing of the seal is done by induction.
  • the cover is first manufactured.
  • the tabs are precut in the two reinforcing films which are then returned to said film.
  • the reinforcement films are wound and then unwound onto the complex formed by the reinforcing film (8), the polyolefin foam (9), the aluminum foil (10), the second reinforcing film (11) and finally the sealing layer (12).
  • the films and the complex are associated by means of a coextruded film. We pre-drill holes in the complex until we reach the reinforcing film (4).
  • the support strips are produced in parallel.
  • the support is associated with the lid thus formed by means of a temporary adhesive.
  • the seal is cut in the thickness to the desired shape separately from the positioning of the tongue.

Description

L'invention a pour objet un opercule perforé sur partie de son épaisseur et muni d'une languette d'arrachage, ledit opercule étant destiné à l'obturation d'un récipient. Elle se rapporte également à un joint constitué dudit opercule associé à un support. Elle concerne enfin un récipient du type flacon rigide ou souple muni de l'opercule ou du joint.The subject of the invention is a perforated lid on part of its thickness and provided with a tear-off tab, said lid being intended for closing a container. It also relates to a seal consisting of said seal associated with a support. Finally, it relates to a container of the rigid or flexible bottle type provided with the seal or seal.

Dans la suite de la description, l'invention est plus particulièrement décrite en relation avec les dispositifs du type saupoudreur, sans pour autant que ce soit limitatif.In the remainder of the description, the invention is more particularly described in relation to devices of the sprinkler type, without however being limiting.

La majorité des dispositifs du type saupoudreur aujourd'hui sur le marché se présentent sous la forme d'un récipient présentant sur le buvant, une grille ou une plaque perforée, rigide, réalisée en matière plastique, laquelle est rapportée ou fait partie intégrante du récipient. La grille est généralement recouverte par un bouchon ou capsule, suivant le type d'emballage. Dans certains cas, pour des raisons de conservation du contenu, les grille ou plaque sont recouvertes d'un film, lequel est retiré définitivement dès la première utilisation. Ce type de saupoudreurs reste relativement onéreux à produire et ne donne pas toute satisfaction, en particulier s'agissant de l'étanchéité de la grille au niveau du buvant.The majority of the devices of the type sprinkler today on the market are in the form of a container having on the rim, a grid or a perforated plate, rigid, made of plastic, which is attached or is an integral part of the container . The grid is usually covered by a cap or capsule, depending on the type of packaging. In some cases, for reasons of conservation of the content, the grid or plate is covered with a film, which is removed permanently from the first use. This type of sprinklers remains relatively expensive to produce and does not give any satisfaction, especially with respect to the tightness of the grid at the level of the rim.

Le document US-A-5513781 décrit un opercule selon le préambule de la revendication 1 et, comprenant une couche supérieure et une couche inférieure munie de perforations, les couches étant totalement séparables l'une de l'autre. Le contenu du récipient devient alors sensible à l'humidité, notamment dans l'hypothèse ou le couvercle n'est pas immédiatement remis en place.The document US Patent 5513781 discloses a lid according to the preamble of claim 1 and comprising an upper layer and a lower layer provided with perforations, the layers being completely separable from each other. The contents of the container then becomes sensitive to moisture, especially in the event that the lid is not immediately replaced.

Le document EP0040797 décrit un joint associant un support et un opercule. L'opercule présente dans son épaisseur des orifices obturés par la présence d'une film pelable venant recouvrir juste la surface de l'orifice.The document EP0040797 describes a joint associating a support and a cover. The lid has holes in its thickness closed by the presence of a peelable film just covering the surface of the orifice.

Le problème que se propose de résoudre l'invention est donc celui de mettre au point un nouveau type de saupoudreur qui réponde au problème d'étanchéité, en particulier au niveau du buvant, et dont le coût de production soit limité.The problem to be solved by the invention is that of developing a new type of sprinkler that responds to the problem of tightness, especially at the level of the rim, and whose production cost is limited.

Pour ce faire, le Demandeur a eu l'idée de proposer un opercule, dont la couche supérieure est pleine et pelable et dont la couche inférieure est munie de perforations et/ou de trous prépercés, les couches inférieure et supérieure étant reliées par une charnière, permettant le cas échéant de ne pas avoir recours à la présence d'une capsule ou d'un bouchon. En outre, l'opercule peut être associé à un support pour constituer un joint.To do this, the Applicant had the idea to propose a cap, the upper layer is solid and peelable and the lower layer is provided with perforations and / or pre-drilled holes, the lower and upper layers being connected by a hinge , allowing, if necessary, not to resort to the presence of a capsule or a stopper. In addition, the seal may be associated with a support to form a seal.

Plus précisément, l'invention a pour objet un opercule pour l'obturation d'un récipient, par exemple du type saupoudreur, comprenant un film scellant présentant, dans toute son épaisseur, une ou plusieurs perforations et/ou un ou plusieurs trous prépercés sur lequel est appliqué au moins un film de renfort dépourvu de perforations et/ou de trous prépercés et muni d'un prolongement constituant une languette d'arrachage, le film scellant et le film de renfort étant solidarisés l'un à l'autre au moyen d'un adhésif de sorte à ce que le film de renfort puisse être en partie séparé du film scellant au moment de l'arrachage par la languette.More specifically, the invention relates to a seal for sealing a container, for example of the sprinkler type, comprising a sealant film having, throughout its thickness, one or more perforations and / or one or more pre-drilled holes on which is applied at least one reinforcing film devoid of perforations and / or pre-drilled holes and provided with an extension constituting a pull tab, the sealing film and the reinforcing film being secured to one another by means of an adhesive so that the reinforcing film can be partly separated from the sealing film at the time of tearing by the tongue.

L'invention se caractérise en ce que la partie de l'opercule munie de la languette est munie sur sa face inférieure, à l'opposée de la zone au niveau de laquelle se trouve la languette, d'un adhésif interdisant la séparation définitive des parties supérieure et inférieure de l'opercule formant ainsi une charnière, la partie restante de la face inférieure, en particulier la périphérie, étant munie d'un adhésif repositionnable.The invention is characterized in that the portion of the lid provided with the tongue is provided on its underside, opposite the area at which the tongue is located, an adhesive prohibiting the final separation of the upper and lower parts of the lid thus forming a hinge, the remaining part of the lower face, in particular the periphery, being provided with a repositionable adhesive.

En d'autres termes, l'adhésif situé à l'opposé de la languette joue le rôle de charnière, la présence de colle repositionnable, à la périphérie, permettant de repositionner la partie supérieure de l'opercule sur la partie inférieure après utilisation.In other words, the adhesive located opposite the tongue acts as a hinge, the presence of repositionable adhesive at the periphery, to reposition the upper part of the lid on the lower part after use.

En d'autres termes, le récipient sera obturé au moyen d'un simple opercule et pourra être utilisé comme saupoudreur ou autre, en fonction de la nature du ou des perforations et/ou des trous prépercés.In other words, the container will be closed by means of a simple seal and may be used as a sprinkler or the like, depending on the nature of the perforation (s) and / or pre-drilled holes.

Selon l'invention, la languette est constituée par un prolongement formé dans l'épaisseur du film de renfort.According to the invention, the tongue is constituted by an extension formed in the thickness of the reinforcing film.

La partie de l'opercule se prolongeant par une languette peut être constituée d'un ou plusieurs films de renfort en fonction de l'épaisseur dudit film, de sorte à ce que le film de renfort ne se déchire pas au moment de l'arrachage. Toutefois, il n'est pas obligatoire que la languette soit formée sur la totalité de l'épaisseur de la partie de l'opercule dépourvue de perforations et/ou de trous prépercés. En effet, lorsque la partie supérieure de l'opercule est constituée de deux films de renfort, la languette peut être formée au niveau de l'un, de l'autre ou des deux films de renfort.The portion of the lid extending by a tongue may consist of one or more reinforcing films depending on the thickness of said film, so that the film of reinforcement does not tear at the time of pulling. However, it is not mandatory that the tongue is formed over the entire thickness of the portion of the cap without perforations and / or pre-drilled holes. Indeed, when the upper part of the lid consists of two reinforcing films, the tongue may be formed at one or other of the two reinforcing films.

Dans un mode de réalisation particulier, les films de renfort munis de la languette sont au nombre de 2, respectivement un film de renfort supérieur et un film de renfort inférieur, une impression étant appliquée entre les deux films.In a particular embodiment, the reinforcing films provided with the tongue are 2 in number, respectively an upper reinforcing film and a lower reinforcing film, an impression being applied between the two films.

De manière générale, le matériau constitutif de la languette et donc du film de renfort sera choisi de sorte à ce que la résistance dudit matériau soit supérieure à celle de la force d'arrachage de l'opercule.In general, the material constituting the tongue and therefore the reinforcing film will be selected so that the resistance of said material is greater than that of the pulling force of the lid.

En pratique, le film de renfort est par exemple un film de polyester biorienté d'épaisseur comprise entre 4 et 40 µm, en pratique de 10 à 15 µmIn practice, the reinforcing film is, for example, a biaxially oriented polyester film with a thickness of between 4 and 40 μm, in practice from 10 to 15 μm.

Selon une caractéristique avantageuse, l'opercule est thermoscellant par induction. Pour ce faire, il présente, positionné entre le film de renfort et le film scellant, une feuille réalisée en un matériau diélectrique, en pratique, une feuille d'aluminium d'épaisseur comprise avantageusement entre 10 et 50 µm, de l'ordre par exemple de 20 µm Pour renforcer la résistance de l'ensemble aluminium/film scellant, la feuille réalisée en un matériau diélectrique est elle même recouverte d'au moins un film de renfort.According to an advantageous characteristic, the lid is heat-sealable by induction. To do this, it has, positioned between the reinforcing film and the sealing film, a sheet made of a dielectric material, in practice, an aluminum sheet with a thickness advantageously between 10 and 50 μm, of the order of example of 20 microns To strengthen the strength of the aluminum / sealant film, the sheet made of a dielectric material is itself covered with at least one reinforcing film.

Dans un mode de réalisation perfectionné, la feuille réalisée en un matériau conducteur est séparée du film de renfort ci-avant référencé par une mousse d'épaisseur comprise entre 0,4 et 4 mm, avantageusement de l'ordre de 1 mm, de densité comprise entre 50 et 500 kg/m3, avantageusement de l'ordre de 250 kg/m3. La mousse est en pratique une mousse de polyoléfine. Pour renforcer d'avantage encore la partie de l'opercule munie de trous, l'opercule présente, entre le film scellant et la feuille d'aluminium, à nouveau un film de renfort.In an improved embodiment, the sheet made of a conductive material is separated from the reinforcing film mentioned above by a foam having a thickness of between 0.4 and 4 mm, advantageously of the order of 1 mm, of density between 50 and 500 kg / m 3 , advantageously of the order of 250 kg / m 3 . The foam is in practice a polyolefin foam. To further strengthen the portion of the seal with holes, the seal presents, between the sealing film and the aluminum foil, again a reinforcing film.

Selon une caractéristique essentielle de l'invention, la partie inférieure de l'opercule, c'est-à-dire la partie démunie de languette, présente une ou plusieurs perforations et/ou un ou plusieurs trous prépercés en fonction des applications recherchées. Dans le cas d'une perforation unique, celle-ci n'excédera pas le diamètre interne du buvant du récipient.According to an essential characteristic of the invention, the lower part of the cover, that is to say the unfitted portion of the tongue, has one or more perforations and / or a or several predrilled holes depending on the desired applications. In the case of a single perforation, this one will not exceed the internal diameter of the rim of the container.

Le mode de réalisation selon lequel la partie inférieure de l'opercule, en pratique l'assemblage entre la feuille en aluminium et le film de scellage est pourvue de trous prépercés est particulièrement intéressant pour conférer au récipient un caractère inviolable. En effet, le premier arrachage de la partie supérieure de l'opercule au moyen de la languette entrainera celui des matériaux constitutifs des trous prépercés, en l'espèce l'assemblage alu/film de scellage. En outre, ce mode de réalisation permet d'interdire le contact entre le contenant du récipient et la colle appliquée sur la face inférieure du film de renfort muni de la languette pendant le stockage. Il en est de même en cas de refermeture du récipient, lorsque la partie supérieure de l'opercule est repositionnable. En effet, une fois la partie supérieure de l'opercule repositionnée sur la partie inférieure, les trous formés au moment de l'arrachage, se trouveront de nouveau comblés par la matière restée collée sur la face inférieure du film de renfort constitutif de la partie supérieure de l'opercule.The embodiment in which the lower part of the lid, in practice the assembly between the aluminum sheet and the sealing film is provided with pre-drilled holes is particularly advantageous for giving the container a tamper-proof character. Indeed, the first tearing of the upper part of the lid by means of the tongue will cause that of the materials constituting the pre-drilled holes, in this case the assembly aluminum / sealing film. In addition, this embodiment allows to prohibit the contact between the container of the container and the adhesive applied to the underside of the reinforcing film provided with the tongue during storage. It is the same in case of reclosing the container, when the upper part of the lid is repositionable. Indeed, once the upper part of the cover repositioned on the lower part, the holes formed at the time of tearing, will be filled again by the material remained glued to the underside of the reinforcing film constituting the part top of the operculum.

Selon une autre caractéristique également essentielle, la partie inférieure de l'opercule (dépourvue de languette) et comprenant le film scellant et la partie supérieure de l'opercule comprenant le film de renfort pourvu d'une languette sont solidarisés l'un à l'autre au moyen d'un adhésif de sorte à ce que le film de renfort puisse en partie être séparé du film scellant au moment de l'arrachage par le biais de la languette. Pour ce faire, on peut par exemple appliquer un film adhésif co-extrudé, dont chacune des deux faces a un pouvoir collant différent, la face la plus collante étant appliquée sur la surface inférieure du film de renfort, tandis que la face la moins collante est appliquée sur la face supérieure du film scellant. En pratique, le film co-extrudé est un film à base de polymère, en général synthétique, et choisi judicieusement par l'homme du métier, de manière à obtenir les propriétés recherchées de collage différentiel. De tels polymères sont par exemple des polymères ou co-polymères à base d'acétate, d'acrylate, de polyéthylène ...According to another equally essential characteristic, the lower part of the lid (without tab) and comprising the sealing film and the upper part of the lid comprising the reinforcing film provided with a tongue are secured to one another. other by means of an adhesive so that the reinforcing film can partly be separated from the sealing film at the time of tearing by means of the tongue. For this purpose, it is possible, for example, to apply a coextruded adhesive film, each of whose two faces has a different sticking power, the tackiest face being applied to the lower surface of the reinforcing film, while the less tacky face is applied on the upper side of the sealing film. In practice, the coextruded film is a polymer-based film, generally synthetic, and judiciously chosen by those skilled in the art, so as to obtain the desired properties of differential bonding. Such polymers are, for example, polymers or co-polymers based on acetate, acrylate, polyethylene, etc.

Selon l'invention, la partie supérieure de l'opercule est repositionnable sur la partie inférieure après arrachage partielle. La partie de l'opercule munie de la languette est munie sur sa face inférieure, à l'opposée de la zone au niveau de laquelle se trouve la languette, d'un adhésif interdisant la séparation définitive des parties supérieure et inférieure de l'opercule formant ainsi une charnière, la partie restante de la face inférieure, en particulier la périphérie, étant munie d'un adhésif repositionnable. En d'autres termes, l'adhésif situé à l'opposé de la languette joue le rôle de charnière, la présence de colle repositionnable, à la périphérie, permettant de repositionner la partie supérieure de l'opercule sur la partie inférieure après utilisation. Dans l'hypothèse où la partie inférieure de l'opercule est munie de trous prépercés, la colle repositionnable peut être appliquée sur toute la surface inférieure de la partie supérieure de l'opercule, à l'exception de la « charnière ».According to the invention, the upper part of the lid is repositionable on the lower part after partial tearing. The part of the lid provided with the tongue is provided on its lower face, at the opposite of the zone at which the tongue is located, with an adhesive prohibiting the definitive separation of the upper and lower parts of the lid thus forming a hinge, the the remaining part of the lower face, in particular the periphery, being provided with a repositionable adhesive. In other words, the adhesive located opposite the tongue acts as a hinge, the presence of repositionable adhesive at the periphery, to reposition the upper part of the lid on the lower part after use. In the event that the lower part of the lid is provided with pre-drilled holes, the repositionable adhesive can be applied over the entire lower surface of the upper part of the lid, with the exception of the "hinge".

Comme déjà dit, l'adhésif est choisi pour permettre le repositionnement de l'élément supérieur sur l'élément inférieur après séparation partielle des deux éléments. L'homme du métier saura choisir la composition adéquate.As already said, the adhesive is chosen to allow the repositioning of the upper element on the lower element after partial separation of the two elements. The person skilled in the art will know how to choose the appropriate composition.

Dans le mode de réalisation selon lequel la partie inférieure de l'opercule est munie de perforations, quelle que soit la nature de l'adhésif, celui-ci est avantageusement appliqué sur la face inférieure de l'élément supérieur, sur les zones non en regard des perforations de sorte à éviter le contact entre la colle et le contenu du récipient.In the embodiment according to which the lower part of the lid is provided with perforations, whatever the nature of the adhesive, it is advantageously applied to the lower face of the upper element, to the non-perforated zones. perforations so as to avoid contact between the glue and the contents of the container.

Selon une autre caractéristique, le film thermoscellant est réalisé en un matériau choisi dans le groupe comprenant le polyéthylène, le polypropylène ou le polyester.According to another characteristic, the heat-sealing film is made of a material chosen from the group comprising polyethylene, polypropylene or polyester.

Bien entendu, chacune des autres couches constitutives de l'opercule sont rendues solidaires les unes des autres au moyens de liants classiques.Of course, each of the other constituent layers of the cap are made integral with each other by means of conventional binders.

Suivant que l'opercule soit muni de trous ou de prépercages, ledit opercule peut être fabriqué d'au moins deux façons distinctes.Depending on whether the lid is provided with holes or pre-holes, said lid may be manufactured in at least two distinct ways.

Lorsque la partie inférieure de l'opercule dépourvue de languette présente des trous, le procédé de fabrication est le suivant :

  • on réalise des prédécoupes de languettes dans une bande de film de renfort,
  • on retourne mécaniquement la totalité de la surface des languettes sur la face supérieure de la bande de film de renfort,
  • on forme des trous dans l'épaisseur d'une bande de film scellant,
  • on associe ensuite la face inférieure de la bande de film de renfort avec la face supérieure de la bande de film scellant, par collage différentiel, pour former la bande opercule,
  • on découpe sur la totalité de l'épaisseur de la bande opercule, les opercules à la forme souhaitée de façon repérée par rapport aux languettes.
When the lower part of the lid without tongue has holes, the manufacturing process is as follows:
  • pre-cuts of tongues are made in a reinforcing film strip,
  • the entire surface of the tongues is mechanically returned to the upper face of the reinforcing film strip,
  • holes are formed in the thickness of a sealing film strip,
  • the lower face of the reinforcing film strip is then associated with the upper face of the sealing film strip, by differential bonding, to form the sealing strip,
  • the operculas are cut to the desired shape in a manner that is marked with respect to the tabs over the entire thickness of the sealing strip.

Lorsque la partie inférieure de l'opercule dépourvue de languette présente des préperforations, le procédé de fabrication est le suivant :

  • on réalise des prédécoupes de languettes dans une bande de film de renfort,
  • on retourne mécaniquement la totalité de la surface des languettes sur la face supérieure de la bande de film de renfort,
  • on associe ensuite la face inférieure de la bande de film de renfort avec la face supérieure de la bande de film scellant, par collage différentiel, pour former la bande opercule,
  • on préperce des trous dans l'épaisseur de la bande de film scellant,
  • on découpe sur la totalité de l'épaisseur de la bande opercule, les opercules à la forme souhaitée de façon repérée par rapport aux languettes.
When the lower part of the lid without tongue has preperforations, the manufacturing process is as follows:
  • pre-cuts of tongues are made in a reinforcing film strip,
  • the entire surface of the tongues is mechanically returned to the upper face of the reinforcing film strip,
  • the lower face of the reinforcing film strip is then associated with the upper face of the sealing film strip, by differential bonding, to form the sealing strip,
  • holes are pre-drilled in the thickness of the sealing film strip,
  • the operculas are cut to the desired shape in a manner that is marked with respect to the tabs over the entire thickness of the sealing strip.

Lorsque la partie inférieure de l'opercule pourvue de prépercages ou de trous contient un assemblage film de renfort/aluminium/film thermoscellant, le film de renfort peut être assemblé sur le film de renfort constitutif de la partie supérieure de l'opercule. On effectue ensuite les prépercages dans l'épaisseur du film de renfort associé au film de renfort constitutif de la partie supérieure de l'opercule et dans l'épaisseur de l'assemblage aluminium/film thermoscellant.When the lower part of the cap provided with pre-drills or holes contains a reinforcing film / aluminum / heat-sealing film assembly, the reinforcing film may be assembled on the constituent reinforcing film of the upper part of the lid. The preforms are then made in the thickness of the reinforcing film associated with the reinforcing film constituting the upper part of the cover and in the thickness of the aluminum assembly / heat-sealing film.

Dans un mode de réalisation particulier, la partie inférieure de l'opercule contient, en plus de la feuille d'aluminium, une mousse, à l'instar de ce qui est décrit précédemment. Dans ce cas, on effectue les prépercages dans l'épaisseur du complexe.In a particular embodiment, the lower part of the lid contains, in addition to the aluminum foil, a foam, as described above. In this case, the preforms are made in the thickness of the complex.

Comme déjà dit, un dispositif du type saupoudreur est en général recouvert d'un bouchon ou d'une capsule. Dans ce cas, l'opercule de l'invention peut être associé de manière temporaire à un support pour constituer un joint, avantageusement thermoscellable.As already mentioned, a device of the sprinkler type is generally covered with a cap or a capsule. In this case, the seal of the invention may be temporarily associated with a support to form a seal, preferably heat sealable.

L'opercule aura ainsi plusieurs rôles. L'un d'entre eux sera de conférer une inviolabilité du récipient avant la première ouverture. En outre, il assurera l'étanchéité primaire vis-à-vis de l'extérieur. Enfin et surtout, il se comportera après arrachage de la languette et donc partiellement de l'élément supérieur, comme un saupoudreur.The operculum will thus have several roles. One of them will be to confer inviolability of the container before the first opening. In addition, it will ensure primary sealing vis-à-vis the outside. Finally and above all, it will behave after tearing off the tongue and therefore partially from the upper element, like a sprinkler.

Le support, quant à lui, est destiné à absorber les tolérances entre le fond de la capsule et/ou du bouchon et la partie supérieure du col du récipient, et en outre, à assurer l'étanchéité secondaire dès lors que l'opercule a été en tout ou partie retiré. Il est donc susceptible d'assurer une certaine compression avec effet mémoire pour justement permettre d'absorber ces tolérances.The support, meanwhile, is intended to absorb the tolerances between the bottom of the capsule and / or the cap and the upper part of the neck of the container, and in addition, to ensure secondary sealing when the lid has been totally or partially removed. It is therefore likely to provide some compression with memory effect to precisely allow to absorb these tolerances.

En pratique, le joint est inséré au fond de la capsule ou du bouchon. Une fois le récipient rempli, on vient visser ou clipser le bouchon ou la capsule munie du joint sur le récipient. La partie opercule du joint se trouve alors au contact du buvant. Le scellage de l'opercule sur le buvant est ensuite effectué par thermoscellage par induction. Ce thermoscellage est rendu possible par l'action combinée d'un matériau conducteur, inséré dans l'épaisseur du joint, qui, sous l'effet d'une induction électrique s'échauffe, entrainant le ramollissement du film de scellage sur le buvant. Le matériau conducteur peut être inséré soit dans le support, soit dans l'opercule. Le plus souvent, il est inséré dans l'épaisseur de l'opercule. Lorsque que l'on procède pour la première fois à l'ouverture du récipient, le support inséré au fond du bouchon se désolidarise de l'opercule resté scellé sur le buvant. Ce n'est qu'ensuite que la partie de l'opercule munie de la languette est partiellement retirée par le consommateur.In practice, the seal is inserted at the bottom of the capsule or cap. Once the container is filled, it comes to screw or clip the cap or the capsule with the seal on the container. The seal portion of the seal is then in contact with the rim. The sealing of the lid on the rim is then performed by induction heat sealing. This heat sealing is made possible by the combined action of a conductive material, inserted in the thickness of the seal, which, under the effect of an electric induction is heated, causing the softening of the sealing film on the rim. The conductive material may be inserted either into the support or into the lid. Most often, it is inserted into the thickness of the lid. When one proceeds for the first time to the opening of the container, the support inserted in the bottom of the cap disengages from the lid remained sealed on the rim. It is only then that the part of the lid with the tongue is partially removed by the consumer.

Pour éviter que la languette de l'opercule crée latéralement une surépaisseur dans le bouchon ou capsule, et pour éviter tout risque de détérioration de la languette au moment de la fermeture ou de l'ouverture du bouchon ou de la capsule, la totalité de la surface de la languette est repliée sur la face de l'opercule en contact avec la face correspondante du support.To prevent the tab of the lid creates laterally an extra thickness in the cap or cap, and to prevent any risk of damage to the tongue at the time of closure or opening of the cap or capsule, the entire tongue surface is folded over the face of the cap in contact with the corresponding face of the support.

S'agissant du support, celui-ci peut être réalisé en tout type de matériau compressible avec mémoire de reprise, notamment en polyéthylène expansé ou en polypropylène expansé, éventuellement muni sur au moins une de ses deux faces, d'un film de polypropylène ou polyéthylène pour lui conférer une certaine rigidité. Il peut également être réalisé en carton. En pratique, les supports envisagés ont une épaisseur comprise entre 0,5 et 4 mm avantageusement entre 1 et 2 mm.With regard to the support, it may be made of any type of compressible material with recovery memory, in particular expanded polyethylene or expanded polypropylene, optionally provided on at least one of its two faces, with a polypropylene film or polyethylene to give it a certain rigidity. It can also be made of cardboard. In practice, the supports envisaged have a thickness of between 0.5 and 4 mm, advantageously between 1 and 2 mm.

S'agissant de la solidarisation temporaire entre le support et l'opercule, celle-ci peut être obtenue au moyen d'un adhésif temporaire appliqué ponctuellement sur une multitude de points, par exemple de la cire microcristalline ou, avantageusement au moyen d'un film extrudé constitué par exemple d'un polymère tel que le polyéthylène. Le film adhésif peut être également un film co-extrudé, dont chacune des deux faces a un pouvoir collant différent, la face la plus collante étant par exemple appliquée sur la surface inférieure du support, tandis que la face la moins collante est appliquée sur la face supérieure de l'opercule. En pratique, le film co-extrudé est un film à base de polymère, en général synthétique, et choisi judicieusement par l'homme du métier, de manière à obtenir les propriétés recherchées de collage différentiel. De tels polymères sont par exemple des polymères ou co-polymères à base d'acétate, d'acrylate, de polyéthylène ...As regards the temporary connection between the support and the cover, this can be obtained by means of a temporary adhesive applied punctually to a multitude of points, for example microcrystalline wax or, advantageously by means of a movie extruded such as a polymer such as polyethylene. The adhesive film may also be a coextruded film, each of which has a different sticking power on both sides, the most sticky face being applied to the lower surface of the support, for example, while the less tacky face is applied to the surface. upper face of the lid. In practice, the coextruded film is a polymer-based film, generally synthetic, and judiciously chosen by those skilled in the art, so as to obtain the desired properties of differential bonding. Such polymers are, for example, polymers or co-polymers based on acetate, acrylate, polyethylene, etc.

De manière générale, l'adhésif doit être choisi de telle sorte à ce que la force d'assemblage entre le support et l'opercule soit inférieure à celle de la couche thermoscellante sur le buvant.In general, the adhesive must be chosen so that the assembly force between the support and the cover is lower than that of the heat-sealing layer on the rim.

L'invention a également pour objet un procédé de fabrication des joints thermoscellables précédemment décrits.The subject of the invention is also a method for manufacturing the heat-sealable seals described above.

Dans ce cas, le procédé de l'invention comprend les étapes suivantes :

  • on fabrique une bande opercule selon le procédé décrit précédemment,
  • parallèlement, on prépare une bande support
  • on solidarise ensuite temporairement la bande support à la bande opercule au moyen d'un adhésif temporaire, pour former la bande joint,
  • on découpe sur la totalité de l'épaisseur de la bande joint, les joints à la forme souhaitée de façon repérée par rapport aux languettes.
In this case, the method of the invention comprises the following steps:
  • a sealing strip is manufactured according to the method described above,
  • in parallel, we prepare a support band
  • the support strip is then secured temporarily to the sealing strip by means of a temporary adhesive, to form the joined strip,
  • the joints of the desired shape are cut out over the entire thickness of the joined strip with regard to the tongues.

Les procédés précédemment cités sont des modes de réalisation préférés de l'invention et ne sont aucunement limitatifs.The processes mentioned above are preferred embodiments of the invention and are in no way limiting.

L'invention et les avantages qui en découlent ressortiront mieux des exemples qui suivent, à l'appui des figures annexées.

  • La figure 1 est une représentation schématique en coupe de l'opercule de l'invention.
  • La figure 2 est une représentation schématique vue de dessous de l'opercule de l'invention.
  • La figure 3 est une représentation schématique en coupe du joint de l'invention.
  • La figure 4 est une représentation en coupe d'un dispositif du type saupoudreur après retrait partiel de la feuille supérieure de l'opercule.
The invention and the advantages which result therefrom will become more apparent from the examples which follow, in support of the appended figures.
  • The figure 1 is a schematic representation in section of the lid of the invention.
  • The figure 2 is a schematic representation seen from below of the lid of the invention.
  • The figure 3 is a schematic representation in section of the seal of the invention.
  • The figure 4 is a sectional representation of a device of the sprinkler type after partial removal of the upper sheet of the lid.

Comme représenté sur la figure 1, l'opercule de l'invention, désigné par la référence générale 1, présente deux éléments essentiels respectivement un élément supérieur (2) et un élément inférieur (3). L'élément supérieur est avantageusement constitué de deux films de renfort (4, 5) dans le prolongement desquels se trouve une languette (6) d'arrachage. L'élément inférieur se caractérise en ce qu'il est muni de trous prépercés (7) (voir figure 2) agencés dans toute son épaisseur. Il est constitué de haut en bas, d'un film de renfort (8), d'une mousse en polyoléfine (9), d'une feuille d'aluminium (10), d'un second film de renfort (11) et enfin d'une couche de scellage (12). Les éléments supérieur et inférieur sont assemblés au moyen d'un adhésif interdisant la séparation définitive des parties supérieure et inférieure de l'opercule formant ainsi une charnière, la partie restante de la face inférieure, en particulier la périphérie, étant munie d'un adhésif repositionnable.As shown on the figure 1 , the operculum of the invention, designated by the general reference 1, has two essential elements respectively an upper element (2) and a lower element (3). The upper element advantageously consists of two reinforcing films (4, 5) in the extension of which is a tab (6) tearing. The lower element is characterized in that it is provided with pre-drilled holes (7) (see figure 2 ) arranged in all its thickness. It is constituted from top to bottom, a reinforcing film (8), a polyolefin foam (9), an aluminum foil (10), a second reinforcing film (11) and finally a sealing layer (12). The upper and lower elements are assembled by means of an adhesive preventing the definitive separation of the upper and lower parts of the cover thus forming a hinge, the remaining part of the lower face, in particular the periphery, being provided with an adhesive repositionable.

La figure 4 représente schématiquement un dispositif de saupoudrage selon l'invention. Il comprend un récipient (13) sur le buvant (14) duquel est appliqué l'opercule (1). A la première utilisation, l'élément supérieur (2) est arraché en partie par préhension de la languette (6). Du fait de la présence des préperforations (7), la matière constitutive de la partie inferieure de l'opercule reste collée sur la face inférieure du film de renfort. Lorsque la partie supérieure (2) est repositionnée sur la partie inférieure (3), la matière revient prendre sa place, c'est-à-dire que les orifices laissés libre après l'arrachage se trouvent de nouveau rebouchés.The figure 4 schematically represents a dusting device according to the invention. It comprises a container (13) on the rim (14) of which is applied the lid (1). At the first use, the upper element (2) is torn off in part by gripping the tongue (6). Due to the presence of the preperforations (7), the constituent material of the lower part of the lid remains stuck on the underside of the reinforcing film. When the upper part (2) is repositioned on the lower part (3), the material returns to take its place, that is to say that the orifices left free after tearing are again rebouched.

Sur la figure 3 est représenté un joint (15) thermoscellable par induction associant un support (16) et l'opercule (1). Le support est réalisé en polypropylène ou polyéthylène expansé et présente une épaisseur comprise entre 1,4 et 1,7 mm. Selon une caractéristique originale, la languette (6) est retournée et en contact avec la face inférieure du support (16). On retrouve en outre l'ensemble des couches décrites sur la figure 1. Le support est associé à l'opercule au moyen d'un adhésif temporaire correspondant à un film extrudé du type polyéthylène (17).On the figure 3 there is shown an induction heat-sealable joint (15) associating a support (16) and the cover (1). The support is made of expanded polypropylene or polyethylene and has a thickness of between 1.4 and 1.7 mm. According to an original feature, the tongue (6) is turned over and in contact with the underside of the support (16). We also find all the layers described on the figure 1 . The support is associated with the lid by means of a temporary adhesive corresponding to an extruded film of the polyethylene type (17).

En pratique, ces joints sont positionnés tels quels au fond du bouchon, le bouchon étant ensuite vissé ou clipsé, selon les cas, sur le col du récipient. Le thermoscellage du joint est effectué par induction.In practice, these seals are positioned as such at the bottom of the cap, the cap is then screwed or clipped, as appropriate, on the neck of the container. Heat sealing of the seal is done by induction.

S'agissant du procédé, on fabrique tout d'abord l'opercule. Pour ce faire, on prédécoupe les languettes dans les deux films de renfort que l'on retourne ensuite sur ledit film. On enroule puis on déroule les films de renfort sur le complexe formé par le film de renfort (8), la mousse en polyoléfine (9), la feuille d'aluminium (10), du second film de renfort (11) et enfin de la couche de scellage (12). Les films et le complexe sont associés au moyen d'un film coextrudé. On préperce des trous dans le complexe jusqu'à atteindre le film de renfort (4). On fabrique parallèlement les bandes support. On associe le support à l'opercule ainsi formé au moyen d'un adhésif temporaire. On découpe le joint dans l'épaisseur à la forme souhaitée de manière séparée par rapport au positionnement de la languette.As regards the process, the cover is first manufactured. To do this, the tabs are precut in the two reinforcing films which are then returned to said film. The reinforcement films are wound and then unwound onto the complex formed by the reinforcing film (8), the polyolefin foam (9), the aluminum foil (10), the second reinforcing film (11) and finally the sealing layer (12). The films and the complex are associated by means of a coextruded film. We pre-drill holes in the complex until we reach the reinforcing film (4). The support strips are produced in parallel. The support is associated with the lid thus formed by means of a temporary adhesive. The seal is cut in the thickness to the desired shape separately from the positioning of the tongue.

L'invention et les avantages qui en découlent ressortent bien de la description qui précède, on note notamment l'avantage de réaliser un opercule à languette pouvant servir de saupoudreur avec ou sans bouchon ou capsule.The invention and the advantages that derive therefrom are clear from the foregoing description, note in particular the advantage of making a tab seal that can serve as a sprinkler with or without cap or capsule.

Claims (10)

  1. Lid (1) for closing a recipient including a sealing film (12) which, throughout its thickness, has one or several perforations and/or one or several pre-pierced holes (7) to which is applied at least one reinforcing film (4), without perforations and/or pre-pierced holes (7) and having with an extension forming a pull tab (6), while the sealing film (12) and the reinforcing film (4) are made integral with one another by means of an adhesive so that the reinforcing film (4) can be partly separated from the sealing film (12) when torn away by the tab, characterized in that the part of the lid with the tab (6) on its lower surface, opposite the area where the tab is placed, has an adhesive preventing the definitive separation of the upper and lower parts of the lid, thus forming a hinge, while the remaining part of the lower side, in particular the perimeter, has a relocatable adhesive.
  2. Lid according to claim 1 characterized in that there are two reinforcing films (4, 5) with printing possibly applied between the two films.
  3. Lid according to claim 1, characterized in that it includes between the reinforcing film(s) and the sealing film, a sheet made of conductive material (10).
  4. Lid according to claim 3, characterized in that the sheet made of a conductive material (10) is itself covered with at least one reinforcing film (8), possibly separated from said sheet by foam (9) having a thickness included between 0.4 and 4 mm.
  5. A lid manufacturing process according to one of the claims 1 to 4, characterized in that:
    - the tabs are cut out of a strip of reinforcing film,
    - the entire surface of the tabs is turned over mechanically onto the upper face of the reinforcing film strip,
    - the lower face of the reinforcing film strip is then combined with the upper face of the sealing film, by differential bonding, to form the lid strip,
    - holes are pre-drilled into the thickness of the sealing film strip,
    - the lids of the desired shape, matching the tabs, are cut out through the total thickness of the lid strip.
  6. Process according to claim 5 characterized in that the lower face of the reinforcing film strip is combined with the upper face of a sheet of dielectric material itself applied to the upper face of the sealing strip.
  7. Seal including a support (16, 17) designed to be positioned at the bottom of a stopper associated with the lid (1) forming the subject of one of the claims 1 to 4 with the supports (16, 17) and the lid (1) attached by means of a temporary adhesive.
  8. Seal according to claim 7, characterized in that the entire surface of the tab (6) of the lid, designed to come into contact with the corresponding face of the support (16, 17), is folded against the upper face of the lid (1).
  9. Manufacturing process of a heat-sealed seal according to one of the claims 7 to 8, characterized in that
    - a lid strip is manufactured according to the method of claim 5,
    - in parallel, a support strip is prepared and the support strip is attached temporarily to the lid strip to form a seal strip,
    - the seals are cut out of the entire thickness of the sealing strip in the desired shape in order to match the tabs.
  10. Device including a recipient provided with an opening at the drinking edge (14) of which the lid (1) forming the subject of one of the claims 1 to 4 is arranged.
EP20100305268 2009-03-18 2010-03-18 Membrane seal provided with a pull tab for sealing a container Active EP2230190B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0901258A FR2943321B1 (en) 2009-03-18 2009-03-18 PERFORATED OPENING HAVING A TAPPING TAB FOR CLOSING A CONTAINER

Publications (2)

Publication Number Publication Date
EP2230190A1 EP2230190A1 (en) 2010-09-22
EP2230190B1 true EP2230190B1 (en) 2014-08-27

Family

ID=41134625

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100305268 Active EP2230190B1 (en) 2009-03-18 2010-03-18 Membrane seal provided with a pull tab for sealing a container

Country Status (2)

Country Link
EP (1) EP2230190B1 (en)
FR (1) FR2943321B1 (en)

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Also Published As

Publication number Publication date
FR2943321A1 (en) 2010-09-24
EP2230190A1 (en) 2010-09-22
FR2943321B1 (en) 2013-12-27

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