EP0269484A1 - Method and device for hermetically closing receptacles - Google Patents

Method and device for hermetically closing receptacles Download PDF

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Publication number
EP0269484A1
EP0269484A1 EP87402384A EP87402384A EP0269484A1 EP 0269484 A1 EP0269484 A1 EP 0269484A1 EP 87402384 A EP87402384 A EP 87402384A EP 87402384 A EP87402384 A EP 87402384A EP 0269484 A1 EP0269484 A1 EP 0269484A1
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EP
European Patent Office
Prior art keywords
container
enclosure
blank
opening
sealing
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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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EP87402384A
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German (de)
French (fr)
Inventor
André Douard
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JOKEY-FRANCE
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JOKEY-FRANCE
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Publication of EP0269484A1 publication Critical patent/EP0269484A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/162—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by feeding web material to securing means
    • B65B7/164—Securing by heat-sealing

Definitions

  • the present invention relates to a method and a device for leaktight closure of containers comprising an opening using a cover by the so-called cover technique.
  • the sealing methods of such packages require the evacuation of the air contained in the container and possibly its replacement by an appropriate gas, before the operation of sealing a seal and cutting of this seal according to the contours of the container. .
  • the patent FR 1 351 301 describes a method for closing containers according to which the container is placed in a box higher than the container by holding above the box a sheet of plastic material which can be welded with the edge of the container, we approach the box of the sheet held above it until the edge of the box forms with the sheet an airtight seal, we expel the air from the box and then we press the one against the other the edge of the container and the sheet and soda them together.
  • US 2 120 272 (WILLIAMS) describes an apparatus for evacuating and closing containers comprising a vacuum enclosure in which the upper part of the container. This device further comprises elements ensuring the sealing of the enclosure at the edges of the container. However, this device does not apply a cover but only a cover.
  • the method of the present invention virtually eliminates the need for a sealed enclosure enclosing the container and minimizes the volume of air that must be exhausted to evacuate the container.
  • a first object of the invention is to propose a method of sealing tightly containers having an opening using a cover by the so-called sealing technique comprising: - bringing said container into a sealing enclosure capable of being sealed from the outside after introduction of the container, - the supply of a blank cover above the opening of the container, the at least partial evacuation of the air contained in said enclosure, in order to evacuate the air contained in the container, and its possible replacement with an appropriate gas, and the sealing of said container by application of said blank against the opening and its sealing on the container with possible cutting of the cover, characterized in that said container is brought so that it constitutes part of said enclosure, thereby limiting the volume of said enclosure to a minimum.
  • a second object of the invention is to provide a sealed container closure device comprising an opening to using a seal by the so-called seal technique, comprising: means for bringing said container into a sealing enclosure capable of being isolated, means for supplying a blank cover, means for at least partial evacuation of the air contained in the enclosure for evacuating the air contained in the container, and possibly means for introducing an appropriate replacement gas, means for applying the blank against the opening of the container, means for sealing the blank on the container, and - possible means of cutting the sealed cover, characterized in that it comprises: - An element provided with an orifice of dimension at least equal to that of the opening of the container, the lateral internal wall of said orifice forming part of the enclosure, said element comprising a bearing surface of said blank and a surface d support of said container, so as to define the aforementioned enclosure between said blank, said lateral internal wall of the element and said container and - A seal between said element and said container, mounted on said element projecting inwardly so that the container comes to bear against the seal in
  • the air evacuation means comprise at least one suction duct produced in the mass of the aforementioned element and opening out on its side wall facing immediately from the projecting inner edge of said seal while leaving a free space for the passage of air.
  • Figure 1 is a perspective view of the apparatus for sealing the buckets according to the closing method of the invention.
  • the bucket 1 is brought by the conveyor belt 20 to the support plate 21 movable vertically.
  • the support plate 21 then lifts the bucket 1 to the sealing enclosure 2, so that the upper rim of the bucket comes to engage in a sealed manner in the receiving orifice 6, thereby limiting the volume of the enclosure.
  • the means for supplying a blank cover consist of a feed roller 22 delivering a thermoplastic film 9 intended to serve both as an upper wall to the sealing enclosure 2 for the evacuation of the air from said enclosure and seal for the final operation of closing the bucket.
  • This film has a width greater than the diameter of the bucket 1 to be sealed and is placed under tension above the opening of the bucket. Furthermore, it is necessary that this film has sufficient strength to withstand the mechanical stresses imposed by the suction in the enclosure 2.
  • the at least partial evacuation of the air contained in said enclosure 2 is implemented to evacuate the air contained in the container and its replacement is carried out, if necessary, by an appropriate gas.
  • the sealing of the bucket 1 is carried out by application of said blank against the opening and its sealing on the container with possible cutting of the cover.
  • the plate 21 descends it on the conveyor belt which will convey it to the exit of the machine.
  • the operation of the device of the invention is fully automatic and the sealing operation is very fast.
  • Figure 2 is a partial section of the closure device according to the invention used for sealing plastic buckets.
  • the enclosure 2 in which the vacuum is created is isolated from the outside and has a very small volume corresponding substantially to the free interior volume of the bucket completed by the free space situated under the blank of cover 3 between the internal lateral walls 5 of element 4.
  • the envelope of the bucket 1 therefore constitutes a part of the enclosure 2.
  • the air evacuation means consist of at least one suction duct 13 made in the mass of the element 4, connected to a valve (not shown) and opening into the enclosure 2 on the internal wall lateral 5 of said element.
  • the lateral internal wall 5 defining the receiving orifice 6 of the bucket 1 in the element 4 is part of the enclosure 2.
  • the receiving orifice 6 has a diameter at least equal to the diameter of the opening of the bucket 1, which allows great flexibility of use.
  • the element 4 has a bearing surface consisting of a flexible annular sealing gasket 7 mounted on the lower periphery of the lateral internal wall 5 so that the upper edge of the bucket 1 comes to bear towards the high against seal 7 in receiving hole 6.
  • the seal 7 projects towards the inside of the enclosure 2 relative to the profile of the lateral internal wall 5 of the element 4.
  • This assembly guarantees the tightness of the enclosure 2 and makes it possible to receive in the orifice 6 buckets of slightly different models and diameters.
  • the element 4 has a bearing surface 8 for receiving and stretching the blank of cover 3 from a continuous thermoplastic film 9 delivered by a feed roller.
  • the blank 3 is pressed against the bearing surface 8 by a holding member 10 which blocks the film during the sealing operation and which then releases it to advance it and put in place a new blank 3.
  • the enclosure After evacuation of the air contained in the enclosure 2 and therefore in the bucket 1, the enclosure can be pressurized with inert gas or any other gas by means of gas introduction means constituted either of the conduit 13 and of a valve (located upstream and not shown), or of another conduit made in the same way as the conduit 13 in the mass of the element 4.
  • the cover 3 is heat sealed on the collar of the bucket 1 by means of the press 11, then is cut by means of the movable blade 12 following the bucket outline 1.
  • the bucket 2 is then released from the orifice 6 and lowered by the plate onto the conveyor belt for the unloading operation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vacuum Packaging (AREA)
  • Closing Of Containers (AREA)

Abstract

Method for hermetically closing receptacles which comprise an opening with the aid of a protective cap using the technique referred to as protective capping, comprising: - bringing the said receptacle 1 into a protective-capping chamber 2 capable of being isolated hermetically from the outside after introduction of the receptacle, - bringing a protective-cap blank 3 over the opening of the receptacle 1, - at least partially removing the air contained in the said chamber, in order to remove the air contained in the receptacle, and its possible replacement with a suitable gas, and - the protective capping of the said receptacle by applying the said blank 3 against the opening and its sealing on the receptacle with possible cutting-out of the protective cap, characterised in that the said receptacle 1 is arranged so as to form a part of the said chamber 2, thus minimising the volume of the said chamber. <IMAGE>

Description

La présente invention concerne un procédé et un dispositif de fermeture étanche de récipients comportant une ouverture à l'aide d'un opercule par la technique dite d'operculage.The present invention relates to a method and a device for leaktight closure of containers comprising an opening using a cover by the so-called cover technique.

Divers produits sont actuellement conditionnés dans des emballages sous vide ou sous atmosphère inerte. Ces emballages sont généralement constitués d'un récipient operculé par un film de matière plastique. C'est la cas notamment des produits alimentaires qui demandent une protection efficace contre l'oxydation.Various products are currently packaged in vacuum packaging or in an inert atmosphere. These packages generally consist of a container sealed with a plastic film. This is particularly the case for food products which require effective protection against oxidation.

Les procédés de fermeture étanche de tels emballages nécessitent l'évacuation de l'air contenu dans le récipient et éventuellement son remplacement par un gaz approprié, avant l'opération de scellage d'un opercule et la découpe de cet opercule suivant les contours du récipient.The sealing methods of such packages require the evacuation of the air contained in the container and possibly its replacement by an appropriate gas, before the operation of sealing a seal and cutting of this seal according to the contours of the container. .

Jusqu'à présent, la plupart des opérations précédentes étaient mises en oeuvre dans une chambre à vide où étaient enfermés le récipient et son contenu et où s'effectuait l'operculage.Until now, most of the above operations have been carried out in a vacuum chamber where the container and its contents were enclosed and where the sealing was carried out.

Le brevet FR 1 351 301 décrit un procédé pour la fermeture de récipients suivant lequel on place le récipient dans une boîte plus haute que le récipient en maintenant au-dessus de la boîte une feuille d'une matière plastique soudable avec le bord du récipient, on approche la boîte de la feuille maintenue au-dessus d'elle jusqu'à ce que le rebord de la boîte forme avec la feuille une fermeture étanche à l'air, on chasse l'air de la boîte et on presse alors l'un contre l'autre le bord du récipient et la feuille et les soude ensemble.The patent FR 1 351 301 describes a method for closing containers according to which the container is placed in a box higher than the container by holding above the box a sheet of plastic material which can be welded with the edge of the container, we approach the box of the sheet held above it until the edge of the box forms with the sheet an airtight seal, we expel the air from the box and then we press the one against the other the edge of the container and the sheet and soda them together.

Ce procédé nécessite l'utilisation d'une boîte entourant le récipient, ce qui complique le dispositif. D'autre part, l'évacuation de l'air n'est possible qu'avec des récipients dont le bord est rainuré.This process requires the use of a box surrounding the container, which complicates the device. On the other hand, the evacuation of the air is only possible with containers whose edge is grooved.

Le US 2 120 272 (WILLIAMS) décrit un appareil de mise sous vide et de fermeture de récipients comprenant une enceinte de mise sous vide dans laquelle vient se loger la partie supérieure du récipient. Cet appareil comporte en outre des éléments assurant l'étanchéité de l'enceinte au niveau des bords du récipient. Cependant, cet appareil ne pose pas d'opercule mais seulement un couvercle.US 2 120 272 (WILLIAMS) describes an apparatus for evacuating and closing containers comprising a vacuum enclosure in which the upper part of the container. This device further comprises elements ensuring the sealing of the enclosure at the edges of the container. However, this device does not apply a cover but only a cover.

Des procédés et dispositifs similaires sont décrits dans les brevets FR 1 538 738 (ANDERSON BROS. MFG. CO.), FR 1 534 586 (ANDERSON BROS. MFG. CO.), FR 2 479 773 (METAL BOX LIMITED), FR 1 335 117 (PROXIMA) et FR 1 457 943 (INDIVE GMBH).Similar methods and devices are described in patents FR 1,538,738 (ANDERSON BROS. MFG. CO.), FR 1,534,586 (ANDERSON BROS. MFG. CO.), FR 2,479,773 (METAL BOX LIMITED), FR 1 335 117 (PROXIMA) and FR 1 457 943 (INDIVE GMBH).

Le procédé de la présente invention élimine pratiquement la nécessité d'une enceinte étanche renfermant le récipient et permet de réduire au minimum le volume d'air qu'il est nécessaire d'évacuer pour faire le vide dans le récipient.The method of the present invention virtually eliminates the need for a sealed enclosure enclosing the container and minimizes the volume of air that must be exhausted to evacuate the container.

Ce problème technique est résolu pour la première fois par la présente invention de manière simple, efficace et peu coûteuse en permettant d'augmenter les cadences de production.This technical problem is solved for the first time by the present invention in a simple, efficient and inexpensive manner by making it possible to increase the production rates.

Un premier objet de l'invention est de proposer un procédé de fermeture étanche de récipients comportant une ouverture à l'aide d'un opercule par la technique dite d'operculage comprenant :
- l'amenée dudit récipient dans une enceinte d'operculage susceptible d'être isolée de manière étanche de l'extérieur après introduction du récipient,
- l'amenée d'une ébauche d'opercule au-dessus de l'ouverture du récipient,
- l'évacuation au moins partielle de l'air contenu dans ladite enceinte, pour évacuer l'air contenu dans le récipient, et son remplacement éventuel par un gaz approprié, et
- l'operculage dudit récipient par application de ladite ébauche contre l'ouverture et son scellage sur le récipient avec découpe éventuelle de l'opercule,
caractérisé en ce qu'on amène ledit récipient de telle sorte qu'il constitue une partie de ladite enceinte, en limitant ainsi au minimum le volume de ladite enceinte.A first object of the invention is to propose a method of sealing tightly containers having an opening using a cover by the so-called sealing technique comprising:
- bringing said container into a sealing enclosure capable of being sealed from the outside after introduction of the container,
- the supply of a blank cover above the opening of the container,
the at least partial evacuation of the air contained in said enclosure, in order to evacuate the air contained in the container, and its possible replacement with an appropriate gas, and
the sealing of said container by application of said blank against the opening and its sealing on the container with possible cutting of the cover,
characterized in that said container is brought so that it constitutes part of said enclosure, thereby limiting the volume of said enclosure to a minimum.

Un second objet de l'invention est de fournir un appareil de fermeture étanche de récipients comportant une ouverture à l'aide d'un opercule par la technique dite d'operculage, comprenant:
- des moyens d'amenée dudit récipient dans une enceinte d'operculage susceptible d'être isolée,
- des moyens d'amenée d'une ébauche d'opercule,
- des moyens d'évacuation au moins partielle de l'air contenu dans l'enceinte pour évacuer l'air contenu dans le récipient, et éventuellement des moyens d'introduction d'un gaz de remplacement approprié,
- des moyens d'application de l'ébauche contre l'ouverture du récipient,
- des moyens de scellage de l'ébauche sur le récipient, et
- des moyens éventuels de découpe de l'opercule scellée,
caractérisé en ce qu'il comprend :
- un élément pourvu d'un orifice de dimension au moins égale à celle de l'ouverture du récipient, la paroi interne latérale dudit orifice faisant partie de l'enceinte, ledit élément comportant une surface d'appui de ladite ébauche et une surface d'appui dudit récipient, de manière à définir l'enceinte précitée entre ladite ébauche, ladite paroi interne latérale de l'élément et ledit récipient et
- un joint d'étanchéité entre ledit élément et ledit récipient, monté sur ledit élément en faisant saillie vers l'intérieur de sorte que le récipient vienne en appui contre le joint dans l'orifice de dimension supérieure à celle de son ouverture.A second object of the invention is to provide a sealed container closure device comprising an opening to using a seal by the so-called seal technique, comprising:
means for bringing said container into a sealing enclosure capable of being isolated,
means for supplying a blank cover,
means for at least partial evacuation of the air contained in the enclosure for evacuating the air contained in the container, and possibly means for introducing an appropriate replacement gas,
means for applying the blank against the opening of the container,
means for sealing the blank on the container, and
- possible means of cutting the sealed cover,
characterized in that it comprises:
- An element provided with an orifice of dimension at least equal to that of the opening of the container, the lateral internal wall of said orifice forming part of the enclosure, said element comprising a bearing surface of said blank and a surface d support of said container, so as to define the aforementioned enclosure between said blank, said lateral internal wall of the element and said container and
- A seal between said element and said container, mounted on said element projecting inwardly so that the container comes to bear against the seal in the orifice of dimension greater than that of its opening.

Selon un mode de réalisation préféré de l'invention, les moyens d'évacuation de l'air comprennent au moins un conduit d'aspiration réalisé dans la masse de l'élément précité et débouchant sur sa paroi latérale en vis-à-vis immédiat du bord intérieur en saillie dudit joint tout en ménageant un espace libre pour le passage de l'air.According to a preferred embodiment of the invention, the air evacuation means comprise at least one suction duct produced in the mass of the aforementioned element and opening out on its side wall facing immediately from the projecting inner edge of said seal while leaving a free space for the passage of air.

L'invention sera mieux comprise à la lecture de la description qui va suivre en référence aux dessins annexés dans lesquels :

  • La figure 1 est une vue schématique en perspective avec arrachement partiel de l'appareil de fermeture selon la présente invention.
  • La figure 2 est une coupe partielle de l'appareil de fermeture par la technique dite d'operculage selon la présente invention.
The invention will be better understood on reading the description which follows with reference to the appended drawings in which:
  • Figure 1 is a schematic perspective view with partial tearing of the closing device according to the present invention.
  • Figure 2 is a partial section of the closure apparatus by the so-called lidding technique according to the present invention.

La figure 1 est une vue en perspective de l'appareil à operculer les seaux selon le procédé de fermeture de l'invention.Figure 1 is a perspective view of the apparatus for sealing the buckets according to the closing method of the invention.

Selon un mode de réalisation préféré, le seau 1 est amené par la bande transporteuse 20 jusque sur le plateau support 21 mobile verticalement. Le plateau support 21 soulève ensuite le seau 1 jusqu'à l'enceinte d'operculage 2, de sorte que le rebord supérieur du seau vienne s'engager de façon étanche dans l'orifice de réception 6 en limitant ainsi au minimum le volume de l'enceinte.According to a preferred embodiment, the bucket 1 is brought by the conveyor belt 20 to the support plate 21 movable vertically. The support plate 21 then lifts the bucket 1 to the sealing enclosure 2, so that the upper rim of the bucket comes to engage in a sealed manner in the receiving orifice 6, thereby limiting the volume of the enclosure.

Les moyens d'amenée d'une ébauche d'opercule sont constitués d'un rouleau d'alimentation 22 délivrant un film thermoplastique 9 destiné à servir à la fois de paroi supérieure à l'enceinte d'operculage 2 pour l'évacuation de l'air de ladite enceinte et d'opercule pour l'opération finale de fermeture du seau.The means for supplying a blank cover consist of a feed roller 22 delivering a thermoplastic film 9 intended to serve both as an upper wall to the sealing enclosure 2 for the evacuation of the air from said enclosure and seal for the final operation of closing the bucket.

Ce film a une largeur supérieure au diamètre du seau 1 à operculer et est placé sous tension au-dessus de l'ouverture du seau. Par ailleurs, il est nécessaire que ce film ait une résistance suffisante pour supporter les contraintes mécaniques imposées par l'aspiration dans l'enceinte 2.This film has a width greater than the diameter of the bucket 1 to be sealed and is placed under tension above the opening of the bucket. Furthermore, it is necessary that this film has sufficient strength to withstand the mechanical stresses imposed by the suction in the enclosure 2.

L'évacuation au moins partielle de l'air contenu dans ladite enceinte 2 est mise en oeuvre pour évacuer l'air contenu dans le récipient et on effectue, le cas échéant, son remplacement par un gaz approprié.The at least partial evacuation of the air contained in said enclosure 2 is implemented to evacuate the air contained in the container and its replacement is carried out, if necessary, by an appropriate gas.

L'operculage du seau 1 est effectué par application de ladite ébauche contre l'ouverture et son scellage sur le récipient avec découpe éventuelle de l'opercule.The sealing of the bucket 1 is carried out by application of said blank against the opening and its sealing on the container with possible cutting of the cover.

Lorsque le seau est operculé, le plateau 21 le redescend sur la bande transporteuse qui va l'acheminer jusqu'à la sortie de la machine.When the bucket is sealed, the plate 21 descends it on the conveyor belt which will convey it to the exit of the machine.

Le fonctionnement du dispositif de l'invention est entièrement automatique et l'opération d'operculage est très rapide.The operation of the device of the invention is fully automatic and the sealing operation is very fast.

La figure 2 est une coupe partielle de l'appareil de fermeture selon l'invention utilisé pour operculer des seaux en matière plastique.Figure 2 is a partial section of the closure device according to the invention used for sealing plastic buckets.

L'enceinte 2 dans laquelle on fait le vide est isolée de l'extérieur et a un volume très faible correspondant sensiblement au volume intérieur libre du seau complété de l'espace libre situé sous l'ébauche d'opercule 3 entre les parois internes latérales 5 de l'élément 4. L'enveloppe du seau 1 constitue donc une partie de l'enceinte 2.The enclosure 2 in which the vacuum is created is isolated from the outside and has a very small volume corresponding substantially to the free interior volume of the bucket completed by the free space situated under the blank of cover 3 between the internal lateral walls 5 of element 4. The envelope of the bucket 1 therefore constitutes a part of the enclosure 2.

Les moyens d'évacuation de l'air sont constitués d'au moins un conduit d'aspiration 13 réalisé dans la masse de l'élément 4, relié à une vanne (non représentée) et débouchant dans l'enceinte 2 sur la paroi interne latérale 5 dudit élément.The air evacuation means consist of at least one suction duct 13 made in the mass of the element 4, connected to a valve (not shown) and opening into the enclosure 2 on the internal wall lateral 5 of said element.

La paroi interne latérale 5 définissant l'orifice de réception 6 du seau 1 dans l'élément 4 fait partie de l'enceinte 2. L'orifice de réception 6 a un diamètre au moins égal au diamètre de l'ouverture du seau 1, ce qui permet und grande souplesse d'utilisation.The lateral internal wall 5 defining the receiving orifice 6 of the bucket 1 in the element 4 is part of the enclosure 2. The receiving orifice 6 has a diameter at least equal to the diameter of the opening of the bucket 1, which allows great flexibility of use.

A sa partie inférieure, l'élément 4 comporte une surface d'appui constituée d'un joint souple annulaire d'étanchéité 7 monté sur le pourtour inférieur de la paroi interne latérale 5 pour que le bord supérieur du seau 1 vienne en appui vers le haut contre le joint 7 dans l'orifice de réception 6.At its lower part, the element 4 has a bearing surface consisting of a flexible annular sealing gasket 7 mounted on the lower periphery of the lateral internal wall 5 so that the upper edge of the bucket 1 comes to bear towards the high against seal 7 in receiving hole 6.

Le joint 7 fait saillie vers l'intérieur de l'enceinte 2 par rapport au profil de la paroi interne latérale 5 de l'élément 4.The seal 7 projects towards the inside of the enclosure 2 relative to the profile of the lateral internal wall 5 of the element 4.

Lorsque le bord supérieur du seau 1 est en appui vers le haut contre le joint souple 7, la position de la sortie du conduit 13 se trouve en vis-à-vis immédiat du bord intérieur en saillie du joint 7 tout en ménageant un espace libre pour le passage de l'air. Cette conformation spécifique permet de réaliser une enceinte 2 de volume minimum puisque la paroi latérale interne 5 a ainsi une hauteur très faible qui laisse un intervalle étroit entre l'ouverture du seau 1 et la face inférieure de l'ébauche d'opercule 3.When the upper edge of the bucket 1 bears upwards against the flexible seal 7, the position of the outlet of the duct 13 is immediately opposite the internal protruding edge of the seal 7 while leaving a free space for the passage of air. This specific conformation makes it possible to produce an enclosure 2 of minimum volume since the internal lateral wall 5 has thus a very low height which leaves a narrow gap between the opening of the bucket 1 and the underside of the lid cover 3.

Ce montage garantit l'étanchéité de l'enceinte 2 et permet de recevoir dans l'orifice 6 des seaux de modèle et de diamètres légèrement différents.This assembly guarantees the tightness of the enclosure 2 and makes it possible to receive in the orifice 6 buckets of slightly different models and diameters.

A sa partie supérieure, l'élément 4 comporte une surface d'appui 8 pour recevoir et étirer l'ébauche d'opercule 3 à partir d'un film thermoplastique continu 9 délivré par un rouleau d'alimentation.At its upper part, the element 4 has a bearing surface 8 for receiving and stretching the blank of cover 3 from a continuous thermoplastic film 9 delivered by a feed roller.

L'ébauche 3 est pressée contre la surface d'appui 8 par un organe de maintien 10 qui bloque le film pendant l'opération d'operculage et qui le libère ensuite pour le faire avancer et mettre en place une nouvelle ébauche 3.The blank 3 is pressed against the bearing surface 8 by a holding member 10 which blocks the film during the sealing operation and which then releases it to advance it and put in place a new blank 3.

Après l'évacuation de l'air contenu dans l'enceinte 2 et donc dans le seau 1, l'enceinte peut être mise sous pression de gaz inerte ou de tout autre gaz par l'intermédiaire de moyens d'introduction de gaz constitués soit du conduit 13 et d'une vanne (située en amont et non représentée), soit d'un autre conduit réalisé de la même façon que le conduit 13 dans la masse de l'élément 4.After evacuation of the air contained in the enclosure 2 and therefore in the bucket 1, the enclosure can be pressurized with inert gas or any other gas by means of gas introduction means constituted either of the conduit 13 and of a valve (located upstream and not shown), or of another conduit made in the same way as the conduit 13 in the mass of the element 4.

Une fois le vide ou l'atmosphère recherchée obtenu dans l'enceinte 2, l'opercule 3 est scellé à chaud sur la collerette du seau 1 au moyen de la presse 11, puis est découpé au moyen de la lame mobile 12 en suivant le contour du seau 1.Once the desired vacuum or atmosphere has been obtained in enclosure 2, the cover 3 is heat sealed on the collar of the bucket 1 by means of the press 11, then is cut by means of the movable blade 12 following the bucket outline 1.

Le seau 2 est ensuite dégagé de l'orifice 6 et redescendu par le plateau sur la bande transporteuse pour l'opération de déchargement.The bucket 2 is then released from the orifice 6 and lowered by the plate onto the conveyor belt for the unloading operation.

Bien entendu, diverses modifications peuvent être apportées par l'homme de l'art aux procédés et dispositifs qui viennent d'être décrits uniquement à titre d'exemples non limitatifs sans sortir du cadre de l'invention.Of course, various modifications can be made by those skilled in the art to the methods and devices which have just been described only by way of nonlimiting examples without departing from the scope of the invention.

Claims (5)

1. Procédé de fermeture étanche de récipients comportant une ouverture à l'aide d'un opercule par la technique dite d'operculage comprenant :
- l'amenée dudit récipient 1 dans une enceinte d'operculage 2 susceptible d'être isolée de manière étanche de l'extérieur après introduction du récipient,
- l'amenée d'une ébauche d'opercule 3 au-dessus de l'ouverture du récipient 1,
- l'évacuation au moins partielle de l'air contenu dans ladite enceinte, pour évacuer l'air contenu dans le récipient, et son remplacement éventuel par un gaz approprié, et
- l'operculage dudit récipient par application de ladite ébauche 3 contre l'ouverture et son scellage sur le récipient avec découpe éventuelle de l'opercule,
caractérisé en ce qu'on amène ledit récipient 1 de telle sorte qu'il constitue une partie de ladite enceinte 2, en limitant ainsi au minimum le volume de ladite enceinte.1. A method of leaktight closure of containers comprising an opening using a seal by the so-called seal technique comprising:
- bringing said container 1 into a sealing enclosure 2 capable of being sealed in isolation from the outside after introduction of the container,
the supply of a blank for a cover 3 above the opening of the container 1,
the at least partial evacuation of the air contained in said enclosure, in order to evacuate the air contained in the container, and its possible replacement with an appropriate gas, and
the sealing of said container by applying said blank 3 against the opening and its sealing on the container with possible cutting of the cover,
characterized in that said container 1 is brought so that it forms part of said enclosure 2, thus limiting the volume of said enclosure to a minimum. 2. Appareil de fermeture étanche de récipients comportant une ouverture à l'aide d'un opercule par la technique dite d'operculage, comprenant :
- des moyens d'amenée 20 dudit récipient 1 dans une enceinte d'operculage 2 susceptible d'être isolée,
- des moyens d'amenée 22 d'une ébauche d'opercule 3,
- des moyens d'évacuation au moins partielle de l'air contenu dans l'enceinte 2 pour évacuer l'air contenu dans le récipient 1, et éventuellement des moyens d'introduction d'un gaz de remplacement approprié,
- des moyens d'application de l'ébauche contre l'ouverture du récipient,
- des moyens de secellage 11 de l'ébauche sur le récipient, et
- des moyens éventuels de découpe 12 de l'opercule scellé,
caractérisé en ce qu'il comprend :
- un élément 4 pourvu d'un orifice 6 de dimension au moins égale à celle de l'ouverture du récipient 1, la paroi interne latérale 5 dudit orifice 6 faisant partie de l'enceinte 2, ledit élément 4 comportant une surface d'appui 8 de ladite ébauche 3 et une surface d'appui dudit récipient, de manière à définir l'enceinte précitée entre ladite ébauche 3, ladite paroi interne latérale 5 de l'élément 4 et ledit récipient 1 et
- un joint d'étanchéité 7 entre ledit élément 4 et ledit récipient, monté sur ledit élément 4 en faisant saillie vers l'intérieur de sorte que le récipient vienne en appui contre le joint 7 dans l'orifice 6 de dimension supérieure à celle de son ouverture.2. Apparatus for sealing containers tightly comprising an opening using a cover by the so-called sealing technique, comprising:
means 20 for bringing said container 1 into a sealing enclosure 2 capable of being isolated,
means 22 for supplying a blank cover 3,
means for at least partial evacuation of the air contained in the enclosure 2 to evacuate the air contained in the container 1, and possibly means for introducing an appropriate replacement gas,
means for applying the blank against the opening of the container,
- means 11 for sealing the blank on the container, and
- possible means for cutting 12 the sealed cover,
characterized in that it comprises:
an element 4 provided with an orifice 6 of dimension at least equal to that of the opening of the container 1, the lateral internal wall 5 of said orifice 6 forming part of the enclosure 2, said element 4 comprising a bearing surface 8 of said blank 3 and a bearing surface of said container, so as to define the aforementioned enclosure between said blank 3, said internal wall side 5 of element 4 and said container 1 and
a seal 7 between said element 4 and said container, mounted on said element 4 projecting inwards so that the container comes to bear against the seal 7 in the orifice 6 of dimension greater than that of its opening. 3. Appareil selon la revendication 2, caractérisé en ce que les moyens d'évacuation de l'air comprennent au moins un conduit d'aspiration 13 réalisé dans la masse de l'élément précité et débouchant sur sa paroi latérale 5 en vis-à-vis immédiat du bord intérieur en saillie du joint 7 tout en ménageant un espace libre pour le passage de l'air.3. Apparatus according to claim 2, characterized in that the air evacuation means comprise at least one suction duct 13 formed in the mass of the aforementioned element and opening onto its side wall 5 opposite immediate screw of the projecting inner edge of the joint 7 while leaving a free space for the passage of air. 4. Appareil selon l'une quelconque des revendications 2 et 3 caractérisé en ce que les moyens d'introduction de gaz sont communs aux moyens d'évacuation.4. Apparatus according to any one of claims 2 and 3 characterized in that the gas introduction means are common to the discharge means. 5. Appareil selon l'une quelconque des revendications 2 à 4 caractérisé en ce que l'ébauche est pressée contre la surface d'appui 8 par un organe de maintien 10.5. Apparatus according to any one of claims 2 to 4 characterized in that the blank is pressed against the bearing surface 8 by a holding member 10.
EP87402384A 1986-11-14 1987-10-23 Method and device for hermetically closing receptacles Withdrawn EP0269484A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8615914 1986-11-14
FR8615914A FR2606738B1 (en) 1986-11-14 1986-11-14 METHOD AND DEVICE FOR SEALING CLOSURES OF CONTAINERS

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EP0269484A1 true EP0269484A1 (en) 1988-06-01

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EP87402384A Withdrawn EP0269484A1 (en) 1986-11-14 1987-10-23 Method and device for hermetically closing receptacles

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EP (1) EP0269484A1 (en)
FR (1) FR2606738B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105059592A (en) * 2015-08-04 2015-11-18 成都市罗迪波尔机械设备有限公司 Fresh-keeping gas replacement device and method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2120272A (en) * 1935-07-11 1938-06-14 Hazel Atlas Glass Co Vacuumizer
US2519353A (en) * 1946-10-15 1950-08-22 American Can Co Can closing machine
FR1146545A (en) * 1955-06-20 1957-11-13 Device for vacuum closing bottles with crown-type caps, and machine comprising this device
FR1457943A (en) * 1965-12-10 1966-11-04 Indive Gmbh Automatic closing device for a plastic container and machine fitted with such a device or similar device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2120272A (en) * 1935-07-11 1938-06-14 Hazel Atlas Glass Co Vacuumizer
US2519353A (en) * 1946-10-15 1950-08-22 American Can Co Can closing machine
FR1146545A (en) * 1955-06-20 1957-11-13 Device for vacuum closing bottles with crown-type caps, and machine comprising this device
FR1457943A (en) * 1965-12-10 1966-11-04 Indive Gmbh Automatic closing device for a plastic container and machine fitted with such a device or similar device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105059592A (en) * 2015-08-04 2015-11-18 成都市罗迪波尔机械设备有限公司 Fresh-keeping gas replacement device and method

Also Published As

Publication number Publication date
FR2606738A1 (en) 1988-05-20
FR2606738B1 (en) 1989-07-28

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