EP0678457A1 - Behälter mit einer Verschlussvorrichtung mit einer Klappe und einem Block aus Heisssiegelmaterial - Google Patents

Behälter mit einer Verschlussvorrichtung mit einer Klappe und einem Block aus Heisssiegelmaterial Download PDF

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Publication number
EP0678457A1
EP0678457A1 EP95400874A EP95400874A EP0678457A1 EP 0678457 A1 EP0678457 A1 EP 0678457A1 EP 95400874 A EP95400874 A EP 95400874A EP 95400874 A EP95400874 A EP 95400874A EP 0678457 A1 EP0678457 A1 EP 0678457A1
Authority
EP
European Patent Office
Prior art keywords
cell
chamber
valve
cap
packaging
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP95400874A
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English (en)
French (fr)
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EP0678457B1 (de
Inventor
James Gabriel Maurice Coupe
Michel Flament
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BK SC
Original Assignee
Gether SA
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Publication date
Application filed by Gether SA filed Critical Gether SA
Publication of EP0678457A1 publication Critical patent/EP0678457A1/de
Application granted granted Critical
Publication of EP0678457B1 publication Critical patent/EP0678457B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/22—Details
    • B65D77/225—Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S220/00—Receptacles
    • Y10S220/27—Vents

Definitions

  • the invention relates to a packaging for food products, capable of receiving food to be cooked at least partially in situ; it particularly relates to an improvement of such packaging, in the form of an automatic closing device, making it possible to bag the products to be treated without vacuuming and whatever their temperature and to ensure cooking in situ with evacuation of water vapor and other gaseous products resulting from cooking and finally ensuring automatic closing and natural vacuuming during cooling.
  • the invention also covers any food preparation packaged in such packaging.
  • Pre-cooked foods or food preparations are the subject of an increasing demand but the production of such packaging poses problems, in particular on an industrial scale.
  • a known method consists, after cooking, of placing the raw or pretreated food in a bag, of creating a sufficient vacuum in this bag and of closing it by heat sealing. The vacuum should be around 98%.
  • Plastic bags with a thickness of about 90 microns are commonly used. The implementation is done in a vacuum chamber including heat sealing means. Such a machine is commonly called “manual" because it requires an operator and the production rate is low.
  • thermoforming machine comprising two rolls of plastic film unwound one above the other.
  • the lower film passes over a cell tray located in a vacuum enclosure.
  • the lower film is hollowed out in the cell under the combined effect of the temperature and a depression maintained at the bottom of the cell.
  • Raw or pretreated food is deposited in the hollowed out part, then the upper film is deposited and heat-sealed on the lowered hollow film, so as to define a hermetically sealed package containing a dose of food preparation.
  • This mode of packaging is difficult to implement when certain hot food products have a liquid or pasty consistency (for example sauces) and risk being sucked out of the packaging during formation, due to the vacuum. . In this case the vacuum obtained is not sufficient, and there is presence of residual air.
  • French Patent Application No. 2,629,060 describes a shutter system automatic fitted to a packaging in which food can be cooked.
  • This device comprises a simple valve allowing the air, the vapor and the gases produced during cooking to be released freely during this cooking; theoretically it prevents outside air from entering the packaging during cooling.
  • the device as described is however too rudimentary and does not allow sufficient reliability to be achieved for industrial operation.
  • the valve may open during the storage period, causing the packaging to lose its quality as a sterile container.
  • a significant proportion of the production risks losing the benefit of pasteurization in situ and certain food preparations may turn out to be spoiled when the packaging is opened.
  • the invention proposes a package provided with an improved automatic closing device, capable of solving all of the problems mentioned above, while allowing reliable operation on an industrial scale.
  • the invention therefore relates to a packaging for food products, capable of receiving food to be cooked at least partially in situ, characterized in that it comprises, fixed in a sealed manner through a wall thereof , an automatic closing device comprising: a first chamber communicating with the outside and containing a valve, a second chamber communicating with said first chamber by a passage capable of being closed by said valve, a channel of small cross section extending between this second chamber and the interior of the packaging and a block of heat-fusible material housed in said second chamber.
  • the self-closing device which is in the form of a small rigid plastic insert, can be adapted to any type of packaging known in flexible or semi-rigid plastic, for example bags or trays.
  • the filling of a food preparation can be carried out at atmospheric pressure and at any temperature, with raw or pretreated food. Cooking or the final cooking phase takes place in the packaging, but the flap remains open and the food is not isolated from the cooker during the cooking cycle.
  • the air, water vapor and gaseous products released by the elements themselves during cooking can escape freely from the packaging so that the food is cooked exactly as if it were arranged " in bulk "in the cooker.
  • the heat-fusible material solidifies in the small section channel.
  • the valve is not solely responsible for maintaining the vacuum in the packaging during the entire period of storage. Its main role is to retain the block of hot-melt material when it softens or liquefies during cooking. This could be destroyed or at least damaged, or even expelled from its housing by being first entrained by the gases exiting at high speed during cooking and then sucked inside the packaging during the cooling period.
  • the valve also has the function of preventing the entry of air after cooking; this air could cool the hot-melt material too quickly and prevent it from plugging the small section channel.
  • the valve makes it possible to maintain the heat-fusible material in said second chamber during cooking and to ensure that it is not completely sucked inside the packaging during cooling.
  • the heat-fusible material is entrained in the small section channel by the only vacuum created in the packaging when the water vapor which it contains condenses.
  • the heat-fusible material solidifies in the small section channel and permanently closes the latter, which guarantees the isolation of the processed food products for a period of time corresponding to the shelf life of the products. This hermetic and vacuum closure of the packaging is not called into question subsequently, if the valve detaches from its seat.
  • this type of packaging is particularly suitable for cooking in a vacuum steam cooker, of the type described, for example, in French patent No. 2,674,116 belonging to the applicant.
  • Sachets of products to be cooked, hermetically sealed by thermoforming machines could not generally be used in such a cooker because the bags would swell from the initial phase of injecting steam into the cooker. Then, the condensation created later in the cooker to control the temperature by acting on the vacuum in it would increase the stresses on the bags.
  • the packaging may burst during cooking.
  • the invention also makes it possible to solve this particular problem. In all cases, the plastic films used can be thinner (in particular with a thickness of less than 90 microns), which allows savings in packaging.
  • the invention also relates to a conditioned food preparation, precooked in a package, the latter being hermetically sealed at the end of cooking, characterized in that the said package comprises, fixed in a sealed manner through a wall of that -ci, an automatic closing device comprising a first chamber communicating with the outside and containing a valve, a second chamber communicating with said first chamber by a passage capable of being closed by said valve, a channel of small section extending between said second chamber and the interior of the packaging and of heat-fusible material closing off said channel.
  • the hot-melt material may consist of a paraffin "doped" with a synthetic product based on polyethylene, known per se.
  • the invention marks a significant advance in the field of industrial vacuum packaging of food products. Because the filling of the sachets can be carried out at atmospheric pressure, and at any temperature, liquid or pasty products no longer risk being sucked when the sachet is placed under vacuum. In addition, this evacuation being carried out by condensation of the water vapor remaining in the packaging at the end of cooking, the definitive and reliable sealing of said packaging is carried out after a process of pasteurization of food products, operated under optimal hygienic conditions.
  • one of the walls of the bag 12 is provided with an automatic closing device 15 fixed in leaktight manner (for example by heat-sealing also) through said wall.
  • This device makes it possible to cook the food at least in part in the bag 12, that is to say after the conditioning operation leading to the formation of the weld 13.
  • FIGs 2 and 3 show in detail the structure of the automatic closing device 15.
  • This is in the general form of a rigid plastic insert mounted through a hole 16 of a wall 12a of the bag 12. It is provided with an annular collar 17 hermetically welded to this wall 12a.
  • the device 15 essentially comprises a hollow body 18, in which a first cell 19 is defined and a cap 20 assembled in a sealed manner to the said body, by a weld 21 extending all around the edge 22 of said first cell.
  • the hollow body 18 consists of a cylindrical part extended by a conical part.
  • the collar 17 has come integrally outside the cylindrical part.
  • the cap 20 comprises a second cell 25 having in its bottom wall 26 at least one hole and preferably several 28 of small section capable of establishing communication between the cell 25 and the outside.
  • a partition element 30 through which a central passage 31 is formed is assembled to the cap 20 by a weld 32 extending all around the edge 33 of said second cell 25.
  • a valve 35, movable, is retained in the first cell between the hole 28 and the partitioning element 30.
  • the automatic closing device 15 comprises a first chamber 38 defined in the cap 20 and housing the valve 35, communicating through the holes 28 with the outside of the packaging and a second chamber 40 communicating with said first chamber through the passage 31 capable of being closed by the valve 35.
  • This second chamber is defined by the space left available at the bottom of said first cell 19 by the cap 20 partially engaged therein.
  • a small section channel 41 extends between said second chamber and the interior of the package. Taking into account the heat-fusible material indicated above, such a channel will have a length of approximately 1 cm and a diameter of approximately 1 mm.
  • the second chamber 40 contains, before use (that is to say before cooking food in situ), a block of heat-fusible material 44 shown in broken lines in FIG. 2.
  • This block is simply held captive in said second chamber, it does not adhere to the inner wall of the cell. Therefore, even at the start of cooking, it does not prevent gas circulation from the inside of the package to the outside.
  • the valve 35 has a smaller diameter than that of the cell 25 so that, when it is not applied against the partitioning element 30 forming a seat, the valve does not oppose the evacuation of gaseous products towards the enclosure of the cooker, through the holes 28.
  • the bottom wall 26 of the second cell 25 is curved and that a flat insert 48 provided with peripheral notches 49 is interposed in said second cell between said valve 35 and the holes 28.
  • the valve 35 abuts against this insert 48 when it is pushed back by the flow of gases evacuated from the packaging but these gases can flow by bypassing the valve and crossing the notches 49.
  • the channel 41 is formed in a radial rib 46 extending between one end of the body 18, at the bottom of the cell 19, and the flange 17. It opens into the packaging in the immediate vicinity of this rigid flange, at a place where there is no risk of being blocked by the product contained in the packaging or by its flexible wall when the interior space is evacuated.
  • this radial rib 46 makes it possible to define a channel 41 of desired length without lengthening the height of the automatic closing device.
  • the consumable products collected to form a given food preparation are first introduced into the bag 12 and the latter is closed by heat sealing.
  • the food preparation can be introduced between two strips of flexible plastic material scrolling continuously and each package is individualized by a peripheral heat seal 13 surrounding the food products.
  • automatic closing devices 15 are fixed to one of the bands, at selected and regularly spaced locations, so that each package includes such a device at a predetermined location. All these operations and the apparatuses which carry them out are within the reach of those skilled in the art.
  • the food preparations thus conditioned are subjected to a cooking operation.
  • a cooking operation For example and preferably, such packages, which have been filled at atmospheric pressure, are introduced into a steam cooker operating under vacuum, of the type indicated above. From the start of cooking, communication is possible between the interior of the package and the exterior of the package so that gases escape at high speed by pushing the valve 35 against the insert 48, during all cooking. We thus naturally obtain a pasteurization of the food products cooked in the packaging. During this time, the plug of heat-fusible material 44 softens but nevertheless remains inside the device due to the presence of the valve 35. Then, during cooling, the vapor remaining in the packaging begins to condense which has the immediate consequence of closing the valve 35 and preventing relatively cold air from entering the packaging.
  • the heat-fusible material is not likely to re-solidify too quickly and it is entrained in the channel 41 by the only suction force resulting from the condensation of vapor in the packaging. No reverse circulation of cold gas risks disturbing the solidification of the hot-melt material in this channel.
  • the packaging is definitively hermetically sealed and contains a perfectly pasteurized food preparation.
EP95400874A 1994-04-20 1995-04-19 Behälter mit einer Verschlussvorrichtung mit einer Klappe und einem Block aus Heisssiegelmaterial Expired - Lifetime EP0678457B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9404719 1994-04-20
FR9404719A FR2719028B1 (fr) 1994-04-20 1994-04-20 Emballage pour produits alimentaires et préparation alimentaire conditionnée, utilisant un tel emballage.

Publications (2)

Publication Number Publication Date
EP0678457A1 true EP0678457A1 (de) 1995-10-25
EP0678457B1 EP0678457B1 (de) 1998-07-22

Family

ID=9462308

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95400874A Expired - Lifetime EP0678457B1 (de) 1994-04-20 1995-04-19 Behälter mit einer Verschlussvorrichtung mit einer Klappe und einem Block aus Heisssiegelmaterial

Country Status (8)

Country Link
US (1) US5665408A (de)
EP (1) EP0678457B1 (de)
AT (1) ATE168648T1 (de)
CA (1) CA2147342C (de)
DE (1) DE69503554T2 (de)
DK (1) DK0678457T3 (de)
ES (1) ES2122471T3 (de)
FR (1) FR2719028B1 (de)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK0967160T3 (da) * 1998-06-24 2003-08-11 Alcan Tech & Man Ag Lukkemembran med overtryksventil
US5989608A (en) * 1998-07-15 1999-11-23 Mizuno; Maki Food container for cooking with microwave oven
FR2796924B1 (fr) * 1999-07-29 2001-10-19 Proplast Valve et emballage a valve,notamment pour cuisson d'aliments
FR2796923B1 (fr) * 1999-07-29 2001-10-19 Proplast Valve et emballage a valve, notamment pour cuisson d'aliments
FR2805250B1 (fr) * 2000-02-17 2002-05-10 Ile Bk Soc Civ Dispositif de fermeture automatique pour emballage de produits alimentaires, emballage et preparation alimentaire conditionnee correspondants
DE60107537T2 (de) 2001-05-03 2005-12-15 Société Civile B.K. Automatische Verschlußanordnung mit Heißschmelzmaterial
US6776301B2 (en) * 2002-02-07 2004-08-17 Sonoco Development, Inc. Cap with one-way de-gas feature
US6662827B1 (en) * 2002-07-15 2003-12-16 Sonoco Development, Inc. Overpressure relief valve for packaging container
US20040025711A1 (en) * 2002-08-10 2004-02-12 Cook Shelly Leann Roasting bag
US20070026111A1 (en) * 2002-08-10 2007-02-01 Shelly Leann Cook Method for Obtaining a Fluid From a Bag Containing a Cooked Food Item
US7247216B2 (en) * 2004-06-29 2007-07-24 Weyerhaeuser Co. Process for encapsulation of cellulose based substrate using non-electromagnetic heating
US7384497B2 (en) * 2004-06-29 2008-06-10 Weyerhaeuser Company Process for encapsulation of cellulose based substrates using electromagnetic radiation heating
US7290660B2 (en) 2004-07-23 2007-11-06 Tilman Paul A Storage system having a disposable vacuum bag
US7857514B2 (en) 2006-12-12 2010-12-28 Reynolds Foil Inc. Resealable closures, polymeric packages and systems and methods relating thereto
US8545973B2 (en) * 2008-03-15 2013-10-01 Daniel D. Smolko Sealable containers
US9340330B2 (en) 2010-06-24 2016-05-17 S. C. Johnson & Son, Inc. Storage container lids
US9546010B2 (en) * 2011-10-27 2017-01-17 Peking University Exhaust valve
US20150083727A1 (en) * 2013-09-25 2015-03-26 Daniel D. Smolko Sealable containers
TWI649238B (zh) * 2018-02-05 2019-02-01 川本國際包裝有限公司 包裝袋保鮮排氣閥結構

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0156404A1 (de) * 1984-02-06 1985-10-02 Wavin B.V. Verfahren zum Verpacken, das eine Wärmebehandlung einschliesst, sowie dabei erzeugte gefüllte Verpackung
FR2629060A1 (fr) * 1988-03-28 1989-09-29 Cook In Pack Sa Dispositif d'obturation automatique par effet thermique de conditionnement pour preparations alimentaires a consommations differees
EP0547941A1 (de) * 1991-12-17 1993-06-23 Societe De Constructions De Materiel Metallique Et Electrique Behälter und Verfahren zu seiner Herstellung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT989172B (it) * 1973-06-14 1975-05-20 Goglio Luigi Procedimento per il confeziona mento di prodotti in contenito ri e contenitore per l attuazio ne del procedimento
DE3125496C2 (de) * 1981-06-29 1983-12-29 Wipf AG Verpackungen, 8404 Volketswil Überdruckventil zur Entlüftung von Verpackungen
US4890637A (en) * 1988-12-12 1990-01-02 Flavorcoffee Co. Inc. One way valve
DE4129838A1 (de) * 1991-02-16 1992-08-20 Bosch Gmbh Robert Ueberdruckventil fuer verpackungsbehaelter
US5519994A (en) * 1994-02-18 1996-05-28 Tennessee Gas Pipeline Company Muffler with inlet pipe equalizer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0156404A1 (de) * 1984-02-06 1985-10-02 Wavin B.V. Verfahren zum Verpacken, das eine Wärmebehandlung einschliesst, sowie dabei erzeugte gefüllte Verpackung
FR2629060A1 (fr) * 1988-03-28 1989-09-29 Cook In Pack Sa Dispositif d'obturation automatique par effet thermique de conditionnement pour preparations alimentaires a consommations differees
EP0547941A1 (de) * 1991-12-17 1993-06-23 Societe De Constructions De Materiel Metallique Et Electrique Behälter und Verfahren zu seiner Herstellung

Also Published As

Publication number Publication date
CA2147342C (fr) 2001-08-14
ATE168648T1 (de) 1998-08-15
US5665408A (en) 1997-09-09
ES2122471T3 (es) 1998-12-16
EP0678457B1 (de) 1998-07-22
CA2147342A1 (fr) 1995-10-21
FR2719028B1 (fr) 1996-07-26
FR2719028A1 (fr) 1995-10-27
DE69503554T2 (de) 1999-04-15
DE69503554D1 (de) 1998-08-27
DK0678457T3 (da) 1999-04-26

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