WO2003018405A1 - Method and device for the vacuum sealing of a container for foodstuff - Google Patents

Method and device for the vacuum sealing of a container for foodstuff Download PDF

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Publication number
WO2003018405A1
WO2003018405A1 PCT/FR2002/002943 FR0202943W WO03018405A1 WO 2003018405 A1 WO2003018405 A1 WO 2003018405A1 FR 0202943 W FR0202943 W FR 0202943W WO 03018405 A1 WO03018405 A1 WO 03018405A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
cover
enclosure
vacuum
outlet
Prior art date
Application number
PCT/FR2002/002943
Other languages
French (fr)
Inventor
Bazile Mery Larroche
Original Assignee
Larroche, Brigitte
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Larroche, Brigitte filed Critical Larroche, Brigitte
Priority to EP02796317A priority Critical patent/EP1421001A1/en
Publication of WO2003018405A1 publication Critical patent/WO2003018405A1/en

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Classifications

    • 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
    • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • B65B31/02—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas
    • B65B31/025—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas specially adapted for rigid or semi-rigid containers
    • 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
    • B65D51/00—Closures not otherwise provided for
    • B65D51/16—Closures not otherwise provided for with means for venting air or gas
    • B65D51/1672—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by manual actuation of the closure or other element
    • B65D51/1677—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by manual actuation of the closure or other element by rupturing a portion of the closure
    • 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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/18—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
    • B65D81/20—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
    • B65D81/2007—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum
    • B65D81/2015—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum in an at least partially rigid container

Definitions

  • the invention is in the field of packaging, and more particularly vacuum packaging of foodstuffs in rigid containers. It relates to a method and a device for the vacuum closure of such a container and the vacuum preservation of food. It also relates to a method for the sterilization or pasteurization of foodstuffs vacuum-packed in a rigid container. It also relates to a container intended to be closed under vacuum by implementing the method and a device for applying the invention.
  • a technique for preserving food which consists of packaging them under vacuum inside a rigid container closed by a lid, itself rigid.
  • a problem to be solved lies in the closing of the container and in its subsequent opening.
  • the cover is fixed to the outlet of the container by crimping or by flap of claws of the cover under a rim of the outlet of the container.
  • the means for opening the container are commonly constituted by a member for gripping the cover by the user, either to break the connection between the cover and the container, or to tear the cover by shearing along a path of embrittlement which it comprises.
  • FR2686059 remains speculative as to the means making it possible to carry out such an operation.
  • European patent 79101660 proposes an installation for the vacuum closure of boxes with a lid which comprises a first step of blocking the lid, on the outlet of the box by the vacuum obtained in an enclosure and a second step, in another enclosure, of crimping the cover.
  • this patent does not teach the use of vacuum in the preservation process.
  • the crimping technique makes opening the box tedious.
  • a pasteurization or sterilization operation may be provided after the vacuum closure of the container.
  • FR2686059 mentions the possibility of sterilizing or pasteurizing the container after it has been closed by vacuum.
  • This operation is improved in the invention, by the fact of the deep vacuum, which facilitates the temperature rise effected by vaporization / condensation instead of simple conduction. Back pressure in the enclosure must be ensured in order to maintain the lid on the container.
  • This technique thanks to its application equipment, is capable of controlling all the criteria that allow food to be stored under vacuum in a rigid container, without having to cover the food with a liquid that protects against oxidation, a liquid which tends to dilute the soluble substances in the preserved product. It appears that in general the use of the technique of preserving food under vacuum in a container remains delicate, both with regard to the mechanical closure of the container and with regard to the conditions of placing the food under vacuum.
  • the general aim of the present invention is to propose means for the vacuum preservation of food in rigid containers, which tend to solve the stated problems.
  • the object of the invention is to propose a method and a device for the vacuum closure of a rigid container, the lid of which is held by vacuum, for the preservation of food under vacuum and for the easier opening of the container. rigid container.
  • the invention also aims to propose methods of using such a container kept closed by vacuum, for subsequent treatment by sterilization or pasteurization of the food it contains.
  • the present invention generally proposes to exploit the evacuation of the interior volume of the container, not only for preserving food in the known manner, but also:
  • the invention therefore provides means for placing the cover on the outlet of the container while it is inside a vacuum enclosure.
  • the invention also proposes in this way modalities (progressive depressurization of the container) to limit the impact of this depressurization on the texture of the food.
  • modalities progressive depressurization of the container
  • These methods provide in particular for causing a differential pressure between the interior of the container and atmospheric pressure, at least of the order of 0.3 atmosphere and according to the temperature of the product at its closure by gradually putting the container under vacuum.
  • the inventor realized that it was important to obtain a good preservation of food without deterioration of their appearance and their structure or their taste, to be able to achieve a complete degassing of the container by achieving a deep vacuum, by example of approximately 500 to 980 millibars approximately and being able to drive the descent of the vacuum in a more or less progressive manner according to products ; driving the vacuum level and driving the vacuum exposure time before closing the cover.
  • the concept of deep vacuum is a relative concept linked to the temperature of the product when the container is closed and its subsequent storage temperature.
  • the method of the invention aims to allow the vacuum closure of a rigid container filled with foodstuffs. This process involves placing the filled container and its lid in an enclosure. The latter is successively placed under vacuum so as to create a vacuum in the interior volume of the container, then brought to atmospheric pressure, while the outlet of the container is closed by the cover.
  • These provisions are such that the cover is naturally maintained on the outlet of the container from the pressure differential between the interior volume of the container and atmospheric pressure.
  • this method consists in: a) placing the container and its cover inside the enclosure while holding the cover by magnetic means beyond the outlet of the container; b) putting the enclosure under vacuum and gradually putting the container under vacuum by causing a differential pressure between the interior of the container and atmospheric pressure at least of the order of 0.3 atmosphere, this progressiveness being determined according to the above-mentioned value of pressure differential and the nature of the foodstuffs packed inside the container and also the temperature of the product; c) to control and conduct the descent of the vacuum, the level of the vacuum and the duration of exposure of the product to the vacuum; d) together with the evacuation to position the cover on the outlet of the container by exerting a pressure on the latter which compresses its seal against the outlet of the container; e) bringing the enclosure to atmospheric pressure and releasing the pressure exerted on the cover, the connection between the magnetic means and the cover being interrupted.
  • this magnetism is a naturally permanent magnetism, which is produced by permanent magnets and whose value is evaluated as a function of the bearing surface area of the cover by the magnetic means.
  • this magnetism is a temporary magnetism which is produced by electromagnetic means, the supply of which is interrupted after the enclosure has been brought to atmospheric pressure and before the magnetic means are moved to the initial position.
  • the container and its cover are preferably introduced in superposition inside the enclosure. Then the magnetic means come to grip the cover to keep it away from the outlet of the container, prior to placing the enclosure under vacuum.
  • Another aspect of the invention relates to the implementation of a food processing operation by sterilization or pasteurization, which is provided by heating the container after it is closed. It will be understood that such a treatment relates to foodstuffs containing water.
  • the method of the invention comprises the characteristic that; during the initial operation of introducing the container and its lid into the enclosure, this introduction is carried out with hot foodstuffs.
  • this temperature is determined according to the nature of the food, and that more precisely this temperature is considered to be hot as soon as it is significantly higher than the ambient temperature which is present inside the enclosure. .
  • the instantaneous evaporation of the water caused by placing the container under vacuum causes suitable degassing of the food product.
  • the steam in the water it contains expels the residual air from the product and therefore guarantees an environment for it inside the container made up solely of steam. It follows that the product is protected from any oxidation and that it is not necessary to cum it in full coverage.
  • This process also makes it possible, on pieces of products with reduced juicing such as beans, peas, corn or similar foodstuffs, to considerably reduce the sterilization or pasteurization time for the same result as for the previous degassing processes. obtained promotes the transmission of heat during these operations, by condensation of the vapor contained inside the container on the product itself
  • the present invention also provides a device for implementing the above-mentioned method.
  • This device comprises an enclosure for receiving the container and its cover, these being rigid. This enclosure is connected to means for alternately placing it in vacuum and setting it in place. at atmospheric pressure
  • the device comprises magnetic means for holding the cover, and means for moving these magnetic means. This movement takes place between an initial position, in which the cover is placed beyond the outlet of the container, and a closed position, following the vacuuming of the enclosure, in which the lid is placed so as to close the outlet of the container
  • the means for moving the magnetic means consist of a movable body which supports them and which is maneuverable in a guided manner on the enclosure.
  • the maneuvering of the mobile body is carried out in particular by a motor member external to the enclosure, such as a hydraulic, pneumatic or electric jack.
  • FIG. 1 is a diagram illustrating a device for implementing the method proposed by the invention, according to a preferred embodiment
  • FIGS. 2 and 3 are diagrams illustrating another type of device for implementing the method proposed by the invention.
  • FIGS. 4, 5 and 6 are views respectively in section and from above of a cover for closing a container according to a second embodiment
  • a device for the vacuum packaging of foodstuffs comprises an enclosure 1 intended to receive a container 2 and its cover 3. This enclosure 1 is connected to means 4 for alternately the put under vacuum and at atmospheric pressure.
  • the enclosure 1 comprises a base 5 forming a centering base for the container 2 and a bell 6 covering the base 5.
  • This bell 6 is provided with means 7 for its movement between an open position, in which the interior volume of the enclosure 1 is accessible for setting up and removing the container 2, and a confining position in which the interior volume of the enclosure 1 is hermetically closed.
  • the means 7 for moving the bell consist for example of a motor member, such as the rod of a pneumatic, hydraulic or electric jack.
  • This enclosure 1 also comprises a movable body 8 for alternately lifting the cover 3 and depositing it on the outlet of the container 2.
  • This movable body 8 is moved by motor means 9, such as a pneumatic cylinder, electric hydraulic or the like.
  • This movable body 8 is further equipped with magnetic means 10 for gripping the cover 3.
  • the movable body 8 is part of a wall of the bell 6, and consists of a piston circulating along the side walls of the latter.
  • the method proposed by the invention consists in particular: a) of introducing the container 2 filled with foodstuffs into the enclosure 1, and of positioning it on the base 5. It will be noted that at this stage, the container 2 supports the cover 3 at its outlet.
  • the device for implementing the method comprises an enclosure 1 intended to receive a container 2 and its cover 3 This enclosure 1 is connected to means 4 for alternately the vacuum and atmospheric pressure
  • the enclosure 1 comprises a base 5 forming a centering base for the container 2 and a bell 6 covering the base 5 This bell 6 is provided with means 7 for its movement between an open position, in which the interior volume of the enclosure 1 is accessible for setting up and removing container 2, and a confining position in which the interior volume of enclosure 1 is hermetically sealed
  • the means 7 for moving the bell are for example constituted by a motor member, such as the rod of a pneumatic, hydraulic or electric jack.
  • the base 5 is mounted movable from top to bottom under the action of a jack controlled so that during the evacuation and preferably at the end of the evacuation operation but before interruption thereof, the container and the cover are compressed against the upper wall of the bell 6, which exerts pressure on the seal 20 with which the cover is provided, said seal being housed in a groove at the edge of the container,
  • the free height inside the bell 6 is a function of the height of the container plus a few millimeters, for example two, which allows when the container and its cover are inserted into the bell and that the latter closes, that the lid separates from the container outlet under the action of magnets
  • FIG. 6 is shown an embodiment of a metal container, the outlet of which consists of a cylindrical or partially cylindrical annular rim on which a cover is fixed.
  • the cover is provided with a hollow annular zone receiving a flexible material forming a gasket. sealing
  • the lid has a central perforation covered with a cover which can be perforated to put the container in the atmosphere
  • the cover 3 shown is provided with a small weakening zone 19, which allows, under the effect of the lifting of the ring 22, to carry out a slight perforation on the edge of the cover 3, which has the effect of breaking the vacuum in the container and which allows by a slight pull of the ring to carry out with great ease the total opening of the container
  • a peripheral seal 20 located at the base of cover 3 This seal 20 is intended to be applied against a seat of the container outlet Note that the latter (not shown) preferably has an annular groove formed in said seat This groove is intended to form a reserve for receiving the creep of the seal 20 when it is compressed

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Vacuum Packaging (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
  • Closures For Containers (AREA)

Abstract

The invention relates to a method and device for the vacuum sealing of a container for foodstuff. The aim of the invention is for the cover to be held in place naturally on the opening of the container (2) using the pressure differential between the volume inside the container (2) and at atmospheric pressure. Said method is characterised in that it consists in: a) placing the container (2) and the cover (3) thereof inside the cavity (1) and holding the cover (3) above the opening of the container (2) using magnetic means (10); b) placing the cavity (1) under vacuum; c) positioning the cover (3) on top of the opening of the container (2) by moving the magnetic means (10) supporting said cover towards a closed position; d) placing the cavity (1) at atmospheric pressure; e) moving the magnetic means (10) to the initial position such that the connection between said means (10) and the cover (3) is broken during said movement; f) subsequently raising the cavity to the initial position thereof, thereby freeing the cover-equipped container (2).

Description

PROCEDE ET DISPOSITIF POUR LA FERMETURE SOUS VIDE D'UN CONTENEUR DE DENREES ALIMENTAIRES.METHOD AND DEVICE FOR VACUUM CLOSURE OF A FOOD CONTAINER.
L'invention est du domaine de l'emballage, et plus particulièrement de l'emballage sous vide de denrées alimentaires en conteneur rigide. Elle a pour objet une méthode et un dispositif pour la fermeture sous vide d'un tel conteneur et la conservation sous vide des aliments. Elle a aussi pour objet une méthode pour la stérilisation ou la pasteurisation des denrées alimentaires emballées sous vide en conteneur rigide. Elle a aussi pour objet un conteneur prévu pour être fermé sous vide en mettant en oeuvre la méthode et un dispositif d'application de l'invention.The invention is in the field of packaging, and more particularly vacuum packaging of foodstuffs in rigid containers. It relates to a method and a device for the vacuum closure of such a container and the vacuum preservation of food. It also relates to a method for the sterilization or pasteurization of foodstuffs vacuum-packed in a rigid container. It also relates to a container intended to be closed under vacuum by implementing the method and a device for applying the invention.
On connaît une technique pour la conservation des aliments qui consiste à les emballer sous vide à l'intérieur d'un conteneur rigide fermé par un couvercle, lui même rigide. Un problème à résoudre réside dans la fermeture du conteneur et dans son ouverture ultérieure.A technique is known for preserving food which consists of packaging them under vacuum inside a rigid container closed by a lid, itself rigid. A problem to be solved lies in the closing of the container and in its subsequent opening.
Selon des méthodes connues et couramment appliquées, le couvercle est fixé au débouché du conteneur par sertissage ou par rabat de griffes du couvercle sous un rebord du débouché du conteneur. Lorsque le couvercle est fixé au conteneur par sertissage, les moyens d'ouverture du conteneur sont couramment constitués par un organe de préhension du couvercle par l'utilisateur, soit pour rompre la liaison entre le couvercle et le conteneur, soit pour déchirer le couvercle par cisaillement le long d'un chemin de fragilisation qu'il comporte.According to known and commonly applied methods, the cover is fixed to the outlet of the container by crimping or by flap of claws of the cover under a rim of the outlet of the container. When the cover is fixed to the container by crimping, the means for opening the container are commonly constituted by a member for gripping the cover by the user, either to break the connection between the cover and the container, or to tear the cover by shearing along a path of embrittlement which it comprises.
Un problème posé par cette technique réside dans les inconvénients liés à la structure des moyens mis en oeuvre pour la fermeture du conteneur. Ces moyens impliquent pour le consommateur une opération contraignante et délicate, voire sujette à un risque de blessure. Par ailleurs, et notamment dans le cas d'une fixation par sertissage du couvercle sur le conteneur, le débouché du conteneur n'est pas totalement dégagé, ce qui entraîne des difficultés d'accès par l'utilisateur aux denrées alimentaires qu'il contient.One problem posed by this technique lies in the drawbacks linked to the structure of the means used for closing the container. These means involve for the consumer a binding and delicate operation, even subject to the risk of injury. Furthermore, and in particular in the case of a fixing by crimping the lid on the container, the outlet of the container is not completely cleared, which causes difficulties of access by the user to the foodstuffs which it contains. .
C'est pourquoi il a été émis l'idée d'exploiter la mise sous vide du conteneur pour maintenir naturellement le couvercle par dépression, en mettant à profit la différence de pression entre l'intérieur du conteneur et la pression atmosphérique. On pourra notamment se reporter au brevet FR2686059 (CATRAIN) qui fait mention d'une telle méthode de fixation. Il apparaît que l'opération consistant à la fois à placer le volume intérieur du conteneur sous vide et à le fermer par le couvercle reste délicate à mettre en oeuvre. FR2686059 mentionne la possibilité de ménager dans le couvercle un évent pour permettre l'échappée de l'air hors du conteneur lors de sa mise sous vide. Cet évent est ensuite obturé par une pastille, avant mise à l'atmosphère du conteneur hermétiquement fermé par le couvercle.This is why the idea was put forward to exploit the vacuuming of the container to naturally maintain the lid by vacuum, by taking advantage of the pressure difference between the interior of the container and the atmospheric pressure. Reference may in particular be made to patent FR2686059 (CATRAIN) which mentions such a fixing method. It appears that the operation consisting both of placing the interior volume of the container under vacuum and of closing it with the lid remains difficult to implement. FR2686059 mentions the possibility of providing a vent in the cover to allow the escape of air out of the container when it is placed under vacuum. This vent is then closed by a pellet, before venting the container hermetically closed by the lid.
Cependant, FR2686059 reste spéculatif quant aux moyens permettant de réaliser une telle opération.However, FR2686059 remains speculative as to the means making it possible to carry out such an operation.
Le brevet européen 79101660 propose une installation pour la fermeture sous vide de boites avec couvercle qui comprend une première étape de blocage du couvercle , sur le débouché de la boîte par le vide obtenu dans une enceinte et une deuxième étape, dans une autre enceinte, de sertissage du couvercle.European patent 79101660 proposes an installation for the vacuum closure of boxes with a lid which comprises a first step of blocking the lid, on the outlet of the box by the vacuum obtained in an enclosure and a second step, in another enclosure, of crimping the cover.
D'une part, ce brevet n'enseigne pas l'utilisation du vide dans le processus de conservation. D'autre part, la technique de sertissage rend l'ouverture de la boîte fastidieuse.On the one hand, this patent does not teach the use of vacuum in the preservation process. On the other hand, the crimping technique makes opening the box tedious.
Un autre problème posé généralement dans le domaine de la mise sous vide de conteneurs alimentaires, réside dans les modalités de cette mise sous vide. Cette mise sous vide doit être organisée de manière à assurer une totale élimination des gaz incondensables et donc une totale élimination de l'oxygène, ces éléments ayant pour effet l'altération du contenu tant sur le goût que sur la couleur. Il est également indispensable de moduler la progressivité de la mise sous vide pour éviter l'altération de la texture de l'aliment (éclatement des cellules dans la mise sous vide brutale).Another problem generally posed in the field of vacuum packaging of food containers lies in the methods of this vacuum packaging. This evacuation must be organized so as to ensure a total elimination of the incondensable gases and therefore a total elimination of the oxygen, these elements having the effect of altering the content both on the taste and on the color. It is also essential to modulate the progressiveness of the vacuum to avoid alteration of the texture of the food (bursting of the cells in the brutal vacuum).
En outre, une opération de pasteurisation ou de stérilisation peut être prévue postérieurement à la fermeture sous vide du conteneur. FR2686059 mentionne la possibilité de stériliser ou de pasteuriser le conteneur après sa fermeture par dépression. Cette opération est améliorée dans l'invention, par le fait du vide profond, qui facilite la montée de température effectuée par vaporisation/condensation au lieu de la simple conduction. Une contre-pression dans l'enceinte doit être assurée afin d'assurer le maintien du couvercle sur le contenant. Cette technique grâce à son matériel d'application est capable de contrôler tous les critères qui permettent la conservation sous vide des aliments dans un contenant rigide, sans avoir l'obligation de recouvrir l'aliment d'un liquide protecteur de l'oxydation, liquide qui tend à diluer les substances solubles du produit conservé. Il ressort que d'une manière générale l'utilisation de la technique de conservation des aliments sous vide en conteneur reste délicate, tant au regard de la fermeture mécanique du conteneur qu'au regard des conditions de mise sous vide des aliments.In addition, a pasteurization or sterilization operation may be provided after the vacuum closure of the container. FR2686059 mentions the possibility of sterilizing or pasteurizing the container after it has been closed by vacuum. This operation is improved in the invention, by the fact of the deep vacuum, which facilitates the temperature rise effected by vaporization / condensation instead of simple conduction. Back pressure in the enclosure must be ensured in order to maintain the lid on the container. This technique, thanks to its application equipment, is capable of controlling all the criteria that allow food to be stored under vacuum in a rigid container, without having to cover the food with a liquid that protects against oxidation, a liquid which tends to dilute the soluble substances in the preserved product. It appears that in general the use of the technique of preserving food under vacuum in a container remains delicate, both with regard to the mechanical closure of the container and with regard to the conditions of placing the food under vacuum.
Le but général de la présente invention est de proposer des moyens pour la conservation sous vide des aliments en conteneur rigide, qui tendent à résoudre les problèmes énoncés.The general aim of the present invention is to propose means for the vacuum preservation of food in rigid containers, which tend to solve the stated problems.
Plus précisément, le but de l'invention est de proposer une méthode et un dispositif pour la fermeture sous vide d'un conteneur rigide, dont le couvercle est maintenu par dépression, pour la conservation des aliments sous vide et pour l'ouverture facilitée du conteneur rigide.More specifically, the object of the invention is to propose a method and a device for the vacuum closure of a rigid container, the lid of which is held by vacuum, for the preservation of food under vacuum and for the easier opening of the container. rigid container.
L'invention a aussi pour but de proposer des modalités d'utilisation d'un tel conteneur maintenu fermé par dépression, pour un traitement ultérieur par stérilisation ou pasteurisation des aliments qu'il contient.The invention also aims to propose methods of using such a container kept closed by vacuum, for subsequent treatment by sterilization or pasteurization of the food it contains.
La présente invention propose dans sa généralité d'exploiter la mise sous vide du volume intérieur du conteneur, non seulement pour conserver les aliments à la manière connu, mais aussi :The present invention generally proposes to exploit the evacuation of the interior volume of the container, not only for preserving food in the known manner, but also:
En premier lieu pour participer des moyens de fermeture du conteneur, et plus particulièrement des moyens de maintien du couvercle à son débouché. L'invention propose en cela des moyens pour placer le couvercle sur le débouché du conteneur alors qu'il se trouve à l'intérieur d'une enceinte sous vide.Firstly, to participate in the means for closing the container, and more particularly in the means for holding the cover at its outlet. The invention therefore provides means for placing the cover on the outlet of the container while it is inside a vacuum enclosure.
L'invention propose aussi en cela des modalités (une progressivité de mise en dépression du conteneur) pour limiter l'impact de cette mise en dépression sur la texture des aliments. Ces modalités prévoient notamment de provoquer une pression différentielle entre l'intérieur du conteneur et la pression atmosphérique, au moins de l'ordre de 0,3 atmosphère et selon la température du produit à sa fermeture en mettant progressivement sous vide le conteneur.The invention also proposes in this way modalities (progressive depressurization of the container) to limit the impact of this depressurization on the texture of the food. These methods provide in particular for causing a differential pressure between the interior of the container and atmospheric pressure, at least of the order of 0.3 atmosphere and according to the temperature of the product at its closure by gradually putting the container under vacuum.
L'inventeur s'est aperçu qu'il était important pour obtenir une bonne conservation des aliments sans détérioration de leur aspect et de leur structure ou de leur goût, de pouvoir parvenir à un dégazage complet du conteneur en y réalisant un vide profond, par exemple d'environ 500 à 980 millibars environ et en étant en mesure de conduire la descente du vide de manière plus ou moins progressive selon les produits ; de conduire le niveau de vide et de conduire la durée d'exposition au vide avant fermeture du couvercle.The inventor realized that it was important to obtain a good preservation of food without deterioration of their appearance and their structure or their taste, to be able to achieve a complete degassing of the container by achieving a deep vacuum, by example of approximately 500 to 980 millibars approximately and being able to drive the descent of the vacuum in a more or less progressive manner according to products ; driving the vacuum level and driving the vacuum exposure time before closing the cover.
La notion de vide profond est une notion relative liée à la température du produit lors de la fermeture du conteneur et à sa température ultérieure de conservation.The concept of deep vacuum is a relative concept linked to the temperature of the product when the container is closed and its subsequent storage temperature.
Des essais effectués ont montré que si l'on prend selon le procédé objet de l'invention un produit à 40° et qu'on le soumet à un vide de 950 millibars, on abaisse sa température à 20° du fait de l'évaporation et on obtient un dégazage complet.Tests carried out have shown that if, according to the process which is the subject of the invention, a product is taken at 40 ° and it is subjected to a vacuum of 950 millibars, its temperature is lowered to 20 ° due to evaporation and a complete degassing is obtained.
Dans le cas du foie gras, si on utilise une stérilisation traditionnelle à 105° pendant 90 minutes, on va avoir une perte de matière de 20 % par ressuage de la graisse. Avec le procédé selon l'invention, on limitera le rejet de graisse à une perte de 2 %. Le vide permet de garder la substance du produit et dont son onctuosité.In the case of foie gras, if we use a traditional sterilization at 105 ° for 90 minutes, we will have a loss of material of 20% by bleeding the fat. With the process according to the invention, the rejection of fat will be limited to a loss of 2%. The vacuum keeps the substance of the product and its smoothness.
Dans le cas du thon de qualité germond, une tranche de 100 grammes, perd 3 % et l'huile ne s'intègre pas dans la chair.In the case of germond quality tuna, a slice of 100 grams loses 3% and the oil does not integrate into the flesh.
Avec le procédé objet de l'invention en faisant un vide à 980 millibars, 2 % de l'huile va s'intégrer dans la chair qui sera plus onctueuse et on aura un gain en poids de 2 %, ce qui amène à un différentiel de poids net de 5%.With the process which is the subject of the invention, by creating a vacuum at 980 millibars, 2% of the oil will integrate into the flesh which will be more creamy and there will be a weight gain of 2%, which leads to a differential. 5% net weight.
On relèvera que les modalités de cette progressivité de mise sous vide du conteneur sont inhabituelles dans le domaine en ce qu'elles sont dépendantes et assujetties à la valeur susvisée de différentiel de pression et à la nature des denrées alimentaires emballées à l'intérieur du conteneur et également dépendante de la température d'emballage du produit.It will be noted that the methods of this progressive evacuation of the container are unusual in the field in that they are dependent and subject to the above-mentioned value of pressure differential and to the nature of the foodstuffs packed inside the container. and also dependent on the packaging temperature of the product.
En deuxième lieu, en combinaison ou indépendamment avec les dispositions précédemment visées, pour favoriser un traitement ultérieur de pasteurisation ou de stérilisation des aliments, en limitant l'altération de leur texture et/ou de leur goût et en réduisant les contraintes liées à la mise en oeuvre d'un tel traitement. Ainsi, le procédé de l'invention vise à permettre la fermeture sous vide d'un conteneur rigide rempli de denrées alimentaires. Ce procédé consiste à placer le conteneur rempli et son couvercle dans une enceinte. Celle-ci est successivement mise sous dépression de manière à faire le vide dans le volume intérieur du conteneur, puis mise à la pression atmosphérique, alors que le débouché du conteneur est obturé par le couvercle. Ces dispositions sont telles que le couvercle est naturellement maintenu sur le débouché du conteneur à partir du différentiel de pression entre le volume intérieur du conteneur et la pression atmosphérique.Secondly, in combination or independently with the previously mentioned provisions, to favor a subsequent treatment of pasteurization or sterilization of food, by limiting the alteration of their texture and / or their taste and by reducing the constraints linked to the placing implementing such treatment. Thus, the method of the invention aims to allow the vacuum closure of a rigid container filled with foodstuffs. This process involves placing the filled container and its lid in an enclosure. The latter is successively placed under vacuum so as to create a vacuum in the interior volume of the container, then brought to atmospheric pressure, while the outlet of the container is closed by the cover. These provisions are such that the cover is naturally maintained on the outlet of the container from the pressure differential between the interior volume of the container and atmospheric pressure.
Selon un premier aspect de la présente invention, ce procédé consiste à : a) à placer le conteneur et son couvercle à l'intérieur de l'enceinte en maintenant par des moyens magnétiques le couvercle au-delà du débouché du conteneur ; b) à mettre l'enceinte sous vide et à mettre progressivement sous vide le conteneur en provoquant une pression différentielle entre l'intérieur du conteneur et la pression atmosphérique au moins de l'ordre de 0,3 atmosphère, cette progressivité étant déterminée selon la valeur susvisée de différentiel de pression et la nature des denrées alimentaires emballées à l'intérieur du conteneur et également de la température du produit ; c) à contrôler et conduire la descente du vide, le niveau du vide et la durée d'exposition du produit au vide ; d) conjointement à la mise sous vide à positionner le couvercle sur le débouché du conteneur en exerçant une pression sur celui-ci qui comprime son joint d'étanchéité contre le débouché du conteneur ; e) à mettre l'enceinte à la pression atmosphérique et à relâcher la pression exercée sur le couvercle, la liaison entre les moyens magnétiques et le couvercle étant interrompue.According to a first aspect of the present invention, this method consists in: a) placing the container and its cover inside the enclosure while holding the cover by magnetic means beyond the outlet of the container; b) putting the enclosure under vacuum and gradually putting the container under vacuum by causing a differential pressure between the interior of the container and atmospheric pressure at least of the order of 0.3 atmosphere, this progressiveness being determined according to the above-mentioned value of pressure differential and the nature of the foodstuffs packed inside the container and also the temperature of the product; c) to control and conduct the descent of the vacuum, the level of the vacuum and the duration of exposure of the product to the vacuum; d) together with the evacuation to position the cover on the outlet of the container by exerting a pressure on the latter which compresses its seal against the outlet of the container; e) bringing the enclosure to atmospheric pressure and releasing the pressure exerted on the cover, the connection between the magnetic means and the cover being interrupted.
On comprendra que l'effet susvisé exercé par les moyens magnétiques sur le couvercle résulte d'un magnétisme dont la puissance exercée sur le couvercle est déterminée et produite selon la dépression induite à l'intérieur du conteneur.It will be understood that the above-mentioned effect exerted by the magnetic means on the cover results from a magnetism whose power exerted on the cover is determined and produced according to the vacuum induced inside the container.
Selon une première variante, ce magnétisme est un magnétisme naturellement permanent, qui est produit par des aimants permanents et dont la valeur est évaluée en fonction de la surface de portée du couvercle par les moyens magnétiques. Selon une autre variante, ce magnétisme est un magnétisme temporaire qui est produit par des moyens électromagnétiques, dont l'alimentation est interrompue après mise à la pression atmosphérique de l'enceinte et avant déplacement des moyens magnétiques en position initiale.According to a first variant, this magnetism is a naturally permanent magnetism, which is produced by permanent magnets and whose value is evaluated as a function of the bearing surface area of the cover by the magnetic means. According to another variant, this magnetism is a temporary magnetism which is produced by electromagnetic means, the supply of which is interrupted after the enclosure has been brought to atmospheric pressure and before the magnetic means are moved to the initial position.
On notera aussi qu'afin de simplifier la structure du dispositif prévu pour le maintien du couvercle, le conteneur et son couvercle sont préférentiellement introduits en superposition à l'intérieur de l'enceinte. Puis les moyens magnétiques viennent saisir le couvercle pour le maintenir à distance du débouché du conteneur, préalablement à la mise sous vide de l'enceinte.It will also be noted that in order to simplify the structure of the device provided for holding the cover, the container and its cover are preferably introduced in superposition inside the enclosure. Then the magnetic means come to grip the cover to keep it away from the outlet of the container, prior to placing the enclosure under vacuum.
Un autre aspect de l'invention concerne la mise en oeuvre d'une opération de traitement des aliments par stérilisation ou pasteurisation, qui est prévue par chauffage du conteneur postérieurement à sa fermeture. On comprendra qu'un tel traitement concerne des denrées alimentaires contenant de l'eau. Selon cet aspect, le procédé de l'invention comprend la caractéristique selon laquelle; lors de l'opération initiale d'introduction du conteneur et de son couvercle dans l'enceinte, cette introduction est effectuée avec des denrées alimentaires chaudes.Another aspect of the invention relates to the implementation of a food processing operation by sterilization or pasteurization, which is provided by heating the container after it is closed. It will be understood that such a treatment relates to foodstuffs containing water. According to this aspect, the method of the invention comprises the characteristic that; during the initial operation of introducing the container and its lid into the enclosure, this introduction is carried out with hot foodstuffs.
On comprendra que le degré de cette température est déterminé selon la nature des aliments, et que plus précisément cette température est considérée comme chaude dès lors qu'elle est nettement plus élevée que la température ambiante qui est présente à l'intérieur de l'enceinte.It will be understood that the degree of this temperature is determined according to the nature of the food, and that more precisely this temperature is considered to be hot as soon as it is significantly higher than the ambient temperature which is present inside the enclosure. .
L'évaporation instantanée de l'eau provoquée par la mise sous vide en température du conteneur provoque un dégazage idoine du produit alimentaire. La vapeur de l'eau qu'il contient chasse l'air résiduel du produit et de ce fait garanti un environnement de celui-ci à l'intérieur du conteneur constitué uniquement de vapeur d'eau. Il en découle que le produit est protégé de toute oxydation et qu'il n'est pas nécessaire de le juter en couverture totale.The instantaneous evaporation of the water caused by placing the container under vacuum causes suitable degassing of the food product. The steam in the water it contains expels the residual air from the product and therefore guarantees an environment for it inside the container made up solely of steam. It follows that the product is protected from any oxidation and that it is not necessary to cum it in full coverage.
Ce jutage d'un volume limité mais suffisant pour assurer la stérilisation, permet d'éviter l'inconvénient de la présence d'un liquide de couverture habituellement prévu pour protéger les denrées alimentaires de l'oxydation, qui tend couramment à provoquer la dilution des substances solubles contenues dans le produit.This juicing of a limited volume but sufficient to ensure sterilization, makes it possible to avoid the disadvantage of the presence of a covering liquid usually provided to protect foodstuffs from oxidation, which commonly tends to cause the dilution of soluble substances contained in the product.
En outre, ce procédé permet une meilleure conservation aux substances alimentaires de leurs éléments, tels que vitamines et sels minéraux, qui n'ont pas à subir l'altération de l'oxygène résiduel habituellement contenu dans les produits emballés par les techniques antérieuresIn addition, this process allows better preservation of the food substances of their elements, such as vitamins and mineral salts, which do not have to undergo the alteration of the residual oxygen usually contained in products packaged by prior techniques
Ce procédé permet aussi, sur des produits en morceaux avec jutage réduit tels que les haricots, les petits pois, le mais ou denrées alimentaires analogues, de réduire considérablement le temps de stérilisation ou de pasteurisation pour un même résultat que pour les procédés antérieurs le dégazage obtenu favorise la transmission de la chaleur lors de ces opérations, par condensation de la vapeur contenue à l'intérieur du conteneur sur le produit lui-mêmeThis process also makes it possible, on pieces of products with reduced juicing such as beans, peas, corn or similar foodstuffs, to considerably reduce the sterilization or pasteurization time for the same result as for the previous degassing processes. obtained promotes the transmission of heat during these operations, by condensation of the vapor contained inside the container on the product itself
Pour les produits liquides ou pâteux, comme le foie gras, les pâtés ou analogues, qui permettent uniquement une transmission de la chaleur par conduction, ce procédé permet aussiFor liquid or pasty products, such as foie gras, pâtés or the like, which only allow heat transmission by conduction, this process also allows
* une limitation du ressuage des graisses, et donc une limitation de la perte du poids net du produit emballé lors de la stérilisation* a limitation of the bleeding of fats, and therefore a limitation of the loss of the net weight of the packaged product during sterilization
* la suppression du brunissement de la surface du produit, résultant d'une oxydation habituellement provoquée par l'oxygène résiduel contenu dans les emballages de l'art antérieur * the suppression of the browning of the surface of the product, resulting from an oxidation usually caused by the residual oxygen contained in the packaging of the prior art
* d'améliorer l'onctuosité du produit et donc sa qualité, pour les produits tels que le confit de canard ou analogues * improve the smoothness of the product and therefore its quality, for products such as duck confit or the like
* de favoriser la pénétration de l'huile ou du liquide de couverture, pour les produits tels que les poissons à l'huile ou analogues * to favor the penetration of oil or cover liquid, for products such as fish in oil or the like
La présente invention propose aussi un dispositif pour la mise en oeuvre du procédé susvisé Ce dispositif comprend une enceinte de réception du conteneur et de son couvercle, ceux-ci étant rigides Cette enceinte est reliée à des moyens pour alternativement sa mise en dépression et sa mise a la pression atmosphériqueThe present invention also provides a device for implementing the above-mentioned method. This device comprises an enclosure for receiving the container and its cover, these being rigid. This enclosure is connected to means for alternately placing it in vacuum and setting it in place. at atmospheric pressure
Selon la présente invention, le dispositif comprend des moyens magnétiques de maintien du couvercle, et des moyens pour déplacer ces moyens magnétiques Ce déplacement s'effectue entre une position initiale, dans laquelle le couvercle est placé au-delà du débouché du conteneur, et une position de fermeture, succédant à la mise sous vide de l'enceinte, dans laquelle le couvercle est placé de manière à obturer le débouché du conteneurAccording to the present invention, the device comprises magnetic means for holding the cover, and means for moving these magnetic means. This movement takes place between an initial position, in which the cover is placed beyond the outlet of the container, and a closed position, following the vacuuming of the enclosure, in which the lid is placed so as to close the outlet of the container
Plus précisément et selon une forme avantageuse de réalisation, les moyens de déplacement des moyens magnétiques sont constitués par un corps mobile qui les supporte et qui est manœuvrable de manière guidée sur l'enceinte. La manœuvre du corps mobile s'effectue notamment par un organe moteur extérieur à l'enceinte, tel que vérin hydraulique, pneumatique ou électrique.More precisely and according to an advantageous embodiment, the means for moving the magnetic means consist of a movable body which supports them and which is maneuverable in a guided manner on the enclosure. The maneuvering of the mobile body is carried out in particular by a motor member external to the enclosure, such as a hydraulic, pneumatic or electric jack.
La présente invention sera mieux comprise et des détails en relevant apparaîtront, à la description qui va en être faite d'une forme préférée de réalisation, en relation avec les figures des planches annexées, dans lesquelles :The present invention will be better understood and details will become apparent from the description which will be made of a preferred embodiment thereof, in relation to the figures of the appended plates, in which:
la figure 1 est un schéma illustrant un dispositif pour la mise en oeuvre du procédé proposé par l'invention, selon une forme préférée de réalisation,FIG. 1 is a diagram illustrating a device for implementing the method proposed by the invention, according to a preferred embodiment,
les figures 2 et 3 sont des schémas illustrant un autre type de dispositif pour la mise en oeuvre du procédé proposé par l'invention,FIGS. 2 and 3 are diagrams illustrating another type of device for implementing the method proposed by the invention,
les figures 4, 5 et 6 sont des vues respectivement en coupe et de dessus d'un couvercle d'obturation d'un conteneur selon un deuxième exemple de réalisation,FIGS. 4, 5 and 6 are views respectively in section and from above of a cover for closing a container according to a second embodiment,
Selon la forme de réalisation du dispositif représenté en figure 1 , un dispositif pour l'emballage sous vide de denrées alimentaires comprend une enceinte 1 destinée à recevoir un conteneur 2 et son couvercle 3. Cette enceinte 1 est reliée à des moyens 4 pour alternativement la mettre sous vide et à la pression atmosphérique.According to the embodiment of the device represented in FIG. 1, a device for the vacuum packaging of foodstuffs comprises an enclosure 1 intended to receive a container 2 and its cover 3. This enclosure 1 is connected to means 4 for alternately the put under vacuum and at atmospheric pressure.
L'enceinte 1 comprend un socle 5 formant une assise de centrage pour le conteneur 2 et une cloche 6 coiffant le socle 5. Cette cloche 6 est pourvue de moyens 7 pour son déplacement entre une position d'ouverture, dans laquelle le volume intérieur de l'enceinte 1 est accessible pour la mise en place et le retrait du conteneur 2, et une position de confinement dans laquelle le volume intérieur de l'enceinte 1 est hermétiquement clos.The enclosure 1 comprises a base 5 forming a centering base for the container 2 and a bell 6 covering the base 5. This bell 6 is provided with means 7 for its movement between an open position, in which the interior volume of the enclosure 1 is accessible for setting up and removing the container 2, and a confining position in which the interior volume of the enclosure 1 is hermetically closed.
Les moyens 7 pour déplacer la cloche sont par exemple constitués d'un organe moteur, tel que la tige d'un vérin pneumatique, hydraulique ou électrique.The means 7 for moving the bell consist for example of a motor member, such as the rod of a pneumatic, hydraulic or electric jack.
On comprend que la forme de réalisation illustrée n'est donnée que pour exemple. Cette enceinte 1 comporte en outre un corps mobile 8 pour alternativement soulever le couvercle 3 et le déposer sur le débouché du conteneur 2.It is understood that the illustrated embodiment is given only for example. This enclosure 1 also comprises a movable body 8 for alternately lifting the cover 3 and depositing it on the outlet of the container 2.
Ce corps mobile 8 est mû par des moyens moteurs 9, tels que vérin pneumatique, hydraulique électrique ou analogue. Ce corps mobile 8 est en outre équipé de moyens magnétiques 10 pour saisir le couvercle 3.This movable body 8 is moved by motor means 9, such as a pneumatic cylinder, electric hydraulic or the like. This movable body 8 is further equipped with magnetic means 10 for gripping the cover 3.
On remarque sur l'exemple illustré que le corps mobile 8 est participant d'une paroi de la cloche 6, et est constitué d'un piston circulant le long de parois latérales de cette dernière.Note in the example illustrated that the movable body 8 is part of a wall of the bell 6, and consists of a piston circulating along the side walls of the latter.
Le procédé proposé par l'invention, mis en oeuvre à partir du dispositif représenté, consiste notamment : a) A introduire le conteneur 2 rempli de denrées alimentaires dans l'enceinte 1 , et à le positionner sur le socle 5. On relèvera qu'à cette étape, le conteneur 2 supporte le couvercle 3 à son débouché.The method proposed by the invention, implemented from the device shown, consists in particular: a) of introducing the container 2 filled with foodstuffs into the enclosure 1, and of positioning it on the base 5. It will be noted that at this stage, the container 2 supports the cover 3 at its outlet.
b) A fermer hermétiquement l'enceinte 1 , en déplaçant la cloche 6 jusqu'à compression d'un joint 1 1 situé à sa base. On remarquera que selon la forme avantageuse de réalisation illustrée, le déplacement de la cloche 6 entraîne aussi le déplacement du corps mobile 8 participant de sa paroi, pour approcher les moyens magnétiques 10 qu'il supporte à proximité, voire au contact, du couvercle 3 en vue de sa préhension.b) Hermetically close the enclosure 1, by moving the bell 6 until compression of a seal 11 located at its base. It will be noted that according to the advantageous embodiment illustrated, the displacement of the bell 6 also causes the displacement of the mobile body 8 participating from its wall, to approach the magnetic means 10 that it supports near, even in contact with, the cover 3 for gripping.
c) A déplacer le corps mobile 8 à l'intérieur de la cloche 6, pour retirer le couverclec) To move the movable body 8 inside the bell 6, to remove the cover
3 soutenu par les moyens magnétiques 10.3 supported by magnetic means 10.
d) A mettre l'enceinte 1 sous vide.d) Vacuum enclosure 1.
e) A déplacer le corps mobile 8 pour amener le couvercle 3 contre le débouché du conteneur 2, qu'il ferme alors hermétiquement.e) moving the movable body 8 to bring the cover 3 against the opening of the container 2, which it then closes tightly.
f) A mettre l'enceinte 1 à la pression atmosphérique.f) To put the enclosure 1 at atmospheric pressure.
g) A déplacer le corps mobile 8 pour libérer le couvercle 3 de l'emprise des moyens magnétiques 10.g) moving the movable body 8 to free the cover 3 from the grip of the magnetic means 10.
h) A ouvrir l'enceinte 1 par un déplacement de la cloche 6, pour permettre l'accès au conteneur 2 hermétiquement clos par son couvercle 3, en vue de son retrait Il va de soi que l'installation mettant en œuvre le procédé selon l'invention est dotée comme représenté schématiquement en figure 1 de moyens 4 pour conduire la mise sous vide, c'est-à-dire pour régler la vitesse de descente du vide de manière progressive, pour régler la puissance du vide de manière plus ou moins progressive et pour régler la durée d'exposition au vide, ces données pouvant être variables pour les produits mais le procédé est universel pour tous les produits et tous les emballages rigidesh) To open the enclosure 1 by moving the bell 6, to allow access to the container 2 hermetically closed by its cover 3, with a view to its removal It goes without saying that the installation implementing the method according to the invention is provided, as shown diagrammatically in FIG. 1, with means 4 for carrying out the evacuation, that is to say to adjust the speed of descent of the vacuum gradually, to adjust the power of the vacuum more or less gradually and to adjust the duration of exposure to vacuum, these data can be variable for the products but the process is universal for all products and all rigid packaging
Selon la forme de réalisation représentée à la figure 2 et à la figure 3, le dispositif de mise en oeuvre du procédé comprend une enceinte 1 destinée à recevoir un conteneur 2 et son couvercle 3 Cette enceinte 1 est reliée à des moyens 4 pour alternativement la mettre sous vide et à la pression atmosphériqueAccording to the embodiment shown in FIG. 2 and in FIG. 3, the device for implementing the method comprises an enclosure 1 intended to receive a container 2 and its cover 3 This enclosure 1 is connected to means 4 for alternately the vacuum and atmospheric pressure
L'enceinte 1 comprend un socle 5 formant une assise de centrage pour le conteneur 2 et une cloche 6 coiffant le socle 5 Cette cloche 6 est pourvue de moyens 7 pour son déplacement entre une position d'ouverture, dans laquelle le volume intérieur de l'enceinte 1 est accessible pour la mise en place et le retrait du conteneur 2, et une position de confinement dans laquelle le volume intérieur de l'enceinte 1 est hermétiquement closThe enclosure 1 comprises a base 5 forming a centering base for the container 2 and a bell 6 covering the base 5 This bell 6 is provided with means 7 for its movement between an open position, in which the interior volume of the enclosure 1 is accessible for setting up and removing container 2, and a confining position in which the interior volume of enclosure 1 is hermetically sealed
Les moyens 7 pour déplacer la cloche sont par exemple constitues d'un organe moteur, tel que la tige d'un vérin pneumatique, hydraulique ou électrique Suivant cette forme de réalisation le socle 5 est monté mobile de haut en bas sous l'action d'un vérin commandé en sorte que lors de la mise sous vide et de préférence en fin de l'opération de mise sous vide mais avant interruption de celui-ci, le conteneur et le couvercle soient comprimés contre la paroi supérieure de la cloche 6, ce qui exerce une pression sur le joint 20 d'étanchéité dont est muni le couvercle, ledit joint se logeant dans une rainure du bord du conteneur,The means 7 for moving the bell are for example constituted by a motor member, such as the rod of a pneumatic, hydraulic or electric jack. According to this embodiment, the base 5 is mounted movable from top to bottom under the action of a jack controlled so that during the evacuation and preferably at the end of the evacuation operation but before interruption thereof, the container and the cover are compressed against the upper wall of the bell 6, which exerts pressure on the seal 20 with which the cover is provided, said seal being housed in a groove at the edge of the container,
Lors de l'ouverture de la cloche, les aimants 10 se détachent du couvercle qui reste fixe au conteneurWhen the bell is opened, the magnets 10 detach from the cover which remains fixed to the container
La hauteur libre à l'intérieur de la cloche 6 est fonction de la hauteur du conteneur plus quelques millimètres, par exemple deux, ce qui permet lorsque le conteneur et son couvercle sont introduits dans la cloche et que celle-ci se ferme, que le couvercle se sépare du débouché du conteneur sous l'action des aimants En figure 6 est représentée une forme de réalisation de conteneur en métal dont le débouché est constitué d'un rebord cylindrique ou partiellement cylindrique annulaire sur lequel est fixé un couvercle Le couvercle est pourvu d'une zone annulaire creuse recevant un matériau souple formant joint d'étanchéitéThe free height inside the bell 6 is a function of the height of the container plus a few millimeters, for example two, which allows when the container and its cover are inserted into the bell and that the latter closes, that the lid separates from the container outlet under the action of magnets In FIG. 6 is shown an embodiment of a metal container, the outlet of which consists of a cylindrical or partially cylindrical annular rim on which a cover is fixed. The cover is provided with a hollow annular zone receiving a flexible material forming a gasket. sealing
Le couvercle est doté d'une perforation centrale recouverte d'un opercule qui pourra être perforé pour mettre le conteneur à l'atmosphèreThe lid has a central perforation covered with a cover which can be perforated to put the container in the atmosphere
Sur les fig 4 et 5, le couvercle 3 représenté est muni d'une petite zone de fragilisation 19, qui permet, sous l'effet du soulèvement de l'anneau 22, d'effectuer une légère perforation sur le bord du couvercle 3, ce qui à pour effet de casser le vide dans le conteneur et qui permet par une légère traction de l'anneau d'effectuer avec une très grande facilité l'ouverture totale du conteneurIn FIGS. 4 and 5, the cover 3 shown is provided with a small weakening zone 19, which allows, under the effect of the lifting of the ring 22, to carry out a slight perforation on the edge of the cover 3, which has the effect of breaking the vacuum in the container and which allows by a slight pull of the ring to carry out with great ease the total opening of the container
On remarquera la présence inhabituelle pour ce genre de couvercle 3 couramment utilisé pour la fermeture des conteneurs par sertissage, d'un joint d'étanchéité périphérique 20 situé à la base du couvercle 3 Ce joint d'étanchéité 20 est prévu pour être appliqué contre une assise du débouché du conteneur On notera que ce dernier (non représenté) comporte de préférence une gorge annulaire ménagée dans la dite assise Cette gorge est prévue pour former une réserve pour recevoir le fluage du joint d'étanchéité 20 lorsqu'il est compriméNote the unusual presence for this type of cover 3 commonly used for closing containers by crimping, a peripheral seal 20 located at the base of cover 3 This seal 20 is intended to be applied against a seat of the container outlet Note that the latter (not shown) preferably has an annular groove formed in said seat This groove is intended to form a reserve for receiving the creep of the seal 20 when it is compressed
On relèvera la fonction particulière du joint d'étanchéité 20 équipant le couvercle 3, qui consiste à permettre la fermeture étanche du conteneur 2 avant l'opération de mise à la pression atmosphérique de l'enceinte 1 , selon le procédé de l'invention We will note the particular function of the seal 20 fitted to the cover 3, which is to allow the sealed closure of the container 2 before the operation of bringing the enclosure 1 to atmospheric pressure, according to the method of the invention.

Claims

REVENDICATIONS : CLAIMS:
1. Procédé pour la fermeture sous vide d'un conteneur (2) rigide rempli de denrées alimentaires, la conservation sous vide des dites denrées et l'ouverture facilitée du dit conteneur, ce à placer le conteneur rempli avec son couvercle dans une enceinte, ledit couvercle intégrant un joint d'étanchéité et successivement à mettre cette enceinte sous dépression de manière à faire le vide dans le volume intérieur du conteneur puis à mettre cette enceinte à la pression atmosphérique, le débouché du conteneur étant obturé par le couvercle, cette mise de l'enceinte à la pression atmosphérique permet que le couvercle soit naturellement maintenu sur le débouché du conteneur à partir du différentiel de pression entre le volume intérieur du conteneur et la pression atmosphérique caractérisé en ce qu'il consiste :1. Method for the vacuum closure of a rigid container (2) filled with foodstuffs, the vacuum storage of said foodstuffs and the facilitated opening of said container, this by placing the filled container with its lid in an enclosure, said cover incorporating a seal and successively putting this enclosure under vacuum so as to create a vacuum in the interior volume of the container and then putting this enclosure at atmospheric pressure, the outlet of the container being closed by the cover, this setting of the enclosure at atmospheric pressure allows the lid to be naturally maintained on the outlet of the container from the pressure differential between the interior volume of the container and the atmospheric pressure characterized in that it consists:
a) à placer le conteneur (2) et son couvercle (3) à l'intérieur de l'enceinte (1 ), en maintenant par des moyens magnétiques (10) le couvercle (3) au-delà du débouché du conteneur (2), b) à mettre l'enceinte (1) sous vide et à mettre progressivement sous vide le conteneur (2) en provoquant une pression différentielle entre l'intérieur du conteneur (2) et la pression atmosphérique au moins de l'ordre de 0.3 atmosphère, ceci selon la température du produit contenu, cette progressivité étant déterminée selon la valeur susvisée de différentiel de pression et la nature des denrées alimentaires emballées à l'intérieur du conteneur, c) à contrôler et conduire la descente du vide, le niveau du vide et la durée d'exposition du produit au vide ; d) après la mise sous vide déterminée selon le produit à positionner .le couvercle sur le débouché du conteneur (2), en exerçant une pression sur celui-ci qui comprime son joint d'étanchéité contre le débouché du conteneur ; e) à mettre l'enceinte à la pression atmosphérique et à relâcher la pression exercée sur le couvercle, la liaison entre les moyens magnétiques et le couvercle étant interrompue.a) placing the container (2) and its cover (3) inside the enclosure (1), holding the cover (3) by magnetic means (10) beyond the outlet of the container (2 ), b) putting the enclosure (1) under vacuum and gradually putting under vacuum the container (2) by causing a differential pressure between the interior of the container (2) and atmospheric pressure at least of the order of 0.3 atmosphere, depending on the temperature of the product contained, this progressivity being determined according to the above-mentioned value of pressure differential and the nature of the foodstuffs packed inside the container, c) to control and lead the descent of the vacuum, the level vacuum and the duration of exposure of the product to vacuum; d) after evacuation determined according to the product to be positioned . the cover on the outlet of the container (2), by exerting a pressure on the latter which compresses its seal against the outlet of the container; e) bringing the enclosure to atmospheric pressure and releasing the pressure exerted on the cover, the connection between the magnetic means and the cover being interrupted.
2. Procédé selon la revendication 1 , ce procédé comprenant en outre une opération de traitement des aliments par stérilisation ou pasteurisation, qui intervient postérieurement à la fermeture du conteneur par dépression et qui consiste à le chauffer, caractérisé en ce qui consiste, lors de l'opération initiale d'introduction du conteneur (2) et de son couvercle (3) dans l'enceinte (1) et pour des denrées alimentaires contenant de l'eau, à effectuer cette introduction avec les denrées alimentaires chaudes.2. Method according to claim 1, this method further comprising a food processing operation by sterilization or pasteurization, which takes place after the closure of the container by vacuum and which consists in heating it, characterized in that consists, during the initial operation of introducing the container (2) and its cover (3) into the enclosure (1) and for foodstuffs containing water, to carry out this introduction with hot foodstuffs.
3. Procédé selon la revendication 1 caractérisé en ce que sous l'effet du vide, le joint d'étanchéité périphérique (20) du couvercle s'écrase contre le débouché du conteneur qui est doté d'une gorge annulaire.3. Method according to claim 1 characterized in that under the effect of the vacuum, the peripheral seal (20) of the cover is crushed against the outlet of the container which is provided with an annular groove.
4. Procédé selon la revendication 1 caractérisé en ce que l'ouverture du conteneur s'obtient en soulevant un anneau (22) qui effectue une perforation du couvercle sur la zone (19), ce qui a pour effet de casser le vide.4. Method according to claim 1 characterized in that the opening of the container is obtained by lifting a ring (22) which perforates the cover on the area (19), which has the effect of breaking the vacuum.
5. Dispositif pour la mise en œuvre d'un procédé selon l'une quelconque des revendications précédentes, du genre de dispositif comprenant une enceinte (1 ) de réception du conteneur (2) et de son couvercle (3), ceux-ci étant rigides, cette enceinte (1) étant reliée à des moyens (4) pour alternativement sa mise en dépression et sa mise à la pression atmosphérique caractérisé en ce qu'il comprend des moyens magnétiques (10) de maintien du couvercle (3), et des moyens (8,9) pour déplacer ces moyens magnétiques (10) entre une position initiale, dans laquelle le couvercle (3) est placé au-delà du débouché du conteneur (2), et une position de fermeture après mise sous vide de l'enceinte (1 ) dans laquelle le couvercle (3) est placé de manière à obturer le débouché du conteneur (2).5. Device for implementing a method according to any one of the preceding claims, of the type of device comprising an enclosure (1) for receiving the container (2) and its cover (3), these being rigid, this enclosure (1) being connected to means (4) for alternately placing it in vacuum and bringing it to atmospheric pressure, characterized in that it comprises magnetic means (10) for holding the cover (3), and means (8, 9) for moving these magnetic means (10) between an initial position, in which the cover (3) is placed beyond the opening of the container (2), and a closed position after evacuation of the enclosure (1) in which the cover (3) is placed so as to close the outlet of the container (2).
6. Dispositif selon la revendication 5, caractérisé en ce que les moyens de déplacement des moyens magnétiques (10) sont constitués par un corps mobile (8) qui les supporte et qui est manœuvrable de manière guidée sur l'enceinte par un organe moteur (9) extérieur à l'enceinte (1).6. Device according to claim 5, characterized in that the means for moving the magnetic means (10) consist of a movable body (8) which supports them and which can be maneuvered in a guided manner on the enclosure by a motor member ( 9) outside the enclosure (1).
7. Dispositif selon la revendication 6 caractérisé en ce que l'enceinte (1 ) comprend un socle (5) formant une assise pour le conteneur (2), et une cloche (6) coiffant le socle (5), cette cloche (6) étant pourvue de moyens (7) pour son déplacement entre une position d'ouverture, dans laquelle le volume intérieur de l'enceinte (1) est accessible pour la mise en place et le retrait du conteneur (2), et une position de confinement dans laquelle le volume intérieur de l'enceinte (1) est hermétiquement clos. 7. Device according to claim 6 characterized in that the enclosure (1) comprises a base (5) forming a seat for the container (2), and a bell (6) covering the base (5), this bell (6 ) being provided with means (7) for its displacement between an open position, in which the interior volume of the enclosure (1) is accessible for the installation and removal of the container (2), and a position of confinement in which the interior volume of the enclosure (1) is hermetically closed.
8. Dispositif selon les revendications 6 et 7, caractérisé en ce que le corps mobile (8) est participant d'une paroi de la cloche (6), et est constitué d'un piston circulant le long de parois latérales de cette dernière.8. Device according to claims 6 and 7, characterized in that the movable body (8) is part of a wall of the bell (6), and consists of a piston circulating along the side walls of the latter.
9. Dispositif pour la mise en oeuvre du procédé selon l'une quelconque des revendications 1 à 4 comprenant une enceinte (1) de réception du conteneur (2) et de son couvercle, ceux-ci étant rigides, cette enceinte (1 ) étant relie à des moyens (4) pour conduire sa mise en dépression et sa mise à la pression atmosphérique caractérisé en ce que l'enceinte (1) comprend un socle (5) formant une assise pour le conteneur et une cloche (6) coiffant le socle à l'intérieur de laquelle sont disposés des aimants de préhension du couvercle, la cloche étant pourvue de moyens (7) pour son déplacement entre une position d'ouverture dans laquelle le volume intérieur de l'enceinte (1) est accessible pour la mise en place et le retrait du conteneur (2) et une position de confinement dans laquelle le volume de l'enceinte est hermétiquement clos et que le socle (5) est doté d'un moyen pour son déplacement verticalement vers l'intérieur de la cloche pour exercer une compression sur le conteneur et son couvercle en comprimant le joint souple du couvercle sur le débouché du conteneur, ledit moyen par un mouvement inverse relâchant cette compression.9. Device for implementing the method according to any one of claims 1 to 4 comprising an enclosure (1) for receiving the container (2) and its cover, these being rigid, this enclosure (1) being connects to means (4) for conducting its depression and its atmospheric pressure characterized in that the enclosure (1) comprises a base (5) forming a seat for the container and a bell (6) covering the base inside which magnets are arranged for gripping the cover, the bell being provided with means (7) for its movement between an open position in which the interior volume of the enclosure (1) is accessible for placement and removal of the container (2) and a confinement position in which the volume of the enclosure is hermetically sealed and that the base (5) is provided with means for its displacement vertically towards the interior of the bell to exert compression on the container and its cover by compressing the flexible seal of the cover on the outlet of the container, said means by a reverse movement releasing this compression.
10. Dispositif selon la revendication précédente caractérisé en ce que les aimants (10) de préhension du couvercle sont fixés en position dans la cloche et que le conteneur et son couvercle sont approchés des dits aimants qui soulèvent le couvercle. 10. Device according to the preceding claim characterized in that the magnets (10) for gripping the cover are fixed in position in the bell and that the container and its cover are approached said magnets which lift the cover.
PCT/FR2002/002943 2001-08-28 2002-08-28 Method and device for the vacuum sealing of a container for foodstuff WO2003018405A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02796317A EP1421001A1 (en) 2001-08-28 2002-08-28 Method and device for the vacuum sealing of a container for foodstuff

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0111155A FR2829106B1 (en) 2001-08-28 2001-08-28 METHOD AND DEVICE FOR VACUUM CLOSURE OF A FOOD CONTAINER
FR01/11155 2001-08-28

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PCT/FR2002/002944 WO2003018430A1 (en) 2001-08-28 2002-08-28 Vacuum-closed container lid and container receiving same

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CN103373487A (en) * 2012-04-24 2013-10-30 南京一擎机械制造有限公司 Modified atmosphere packing machine
CN113655188A (en) * 2021-08-31 2021-11-16 翁有生 Detection food placer that food detection device used

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FR2942618A1 (en) * 2009-03-02 2010-09-03 Sodetech PROCESS AND INSTALLATION FOR CONTINUOUS VACUUM PACKAGING OF FOOD PRODUCTS
FR3038298B1 (en) 2015-06-30 2019-10-11 Sodetech METHOD AND SYSTEM FOR DEEP VACUUM PACKAGING OF A FOOD PRODUCT WITHOUT COVER FLUID
FR3046527B1 (en) 2016-01-07 2020-11-27 Sodetech CONTINUOUS PROCESS AND SYSTEM FOR PASTEURIZATION OR STERILIZATION OF FOODSTUFFS IN A RIGID CONTAINER FOLLOWED BY ITS DEEP VACUUM CLOSURE BY ROTARY STEAM INJECTION
FR3048163B1 (en) 2016-02-25 2019-06-14 Sodetech METHOD AND SYSTEM FOR DEGASSING AND RE-INJECTING FOOD FLUIDS

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Also Published As

Publication number Publication date
EP1421001A1 (en) 2004-05-26
FR2829106A1 (en) 2003-03-07
WO2003018430A1 (en) 2003-03-06
FR2829106B1 (en) 2004-10-01

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