EP1422163A1 - Lebensmittelverpackung zur Erwärmung in einem Ofen - Google Patents

Lebensmittelverpackung zur Erwärmung in einem Ofen Download PDF

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Publication number
EP1422163A1
EP1422163A1 EP02388075A EP02388075A EP1422163A1 EP 1422163 A1 EP1422163 A1 EP 1422163A1 EP 02388075 A EP02388075 A EP 02388075A EP 02388075 A EP02388075 A EP 02388075A EP 1422163 A1 EP1422163 A1 EP 1422163A1
Authority
EP
European Patent Office
Prior art keywords
packaging
opening
film
food
relief valve
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.)
Withdrawn
Application number
EP02388075A
Other languages
English (en)
French (fr)
Inventor
Erik Olsen
Willy Meldgaard-Andersen
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.)
Amcor Flexibles ApS
Original Assignee
Amcor Flexibles Europe AS
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 Amcor Flexibles Europe AS filed Critical Amcor Flexibles Europe AS
Priority to EP02388075A priority Critical patent/EP1422163A1/de
Priority to AU2003280319A priority patent/AU2003280319A1/en
Priority to PCT/DK2003/000779 priority patent/WO2004048225A1/en
Publication of EP1422163A1 publication Critical patent/EP1422163A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • 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
    • B65D81/34—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 for packaging foodstuffs or other articles intended to be cooked or heated within the package
    • B65D81/3446—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 for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
    • B65D81/3453—Rigid containers, e.g. trays, bottles, boxes, cups
    • 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
    • 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
    • B65D81/34—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 for packaging foodstuffs or other articles intended to be cooked or heated within the package
    • B65D81/3446—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 for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
    • B65D81/3461—Flexible containers, e.g. bags, pouches, envelopes

Definitions

  • the invention relates to a packaging for packing articles of food and heating thereof in an oven, especially in a microwave oven, said packaging including at least one sealable packaging film at least partially defining a closed chamber containing said article of food, said packaging further including a venting means for allowing gas and vapour emitted during the heating of the article of food to escape from the chamber.
  • Food products are increasingly sold in a partly or fully cooked state, ie either precooked for reheating, eg complete meals, or prepared for cooking, eg fresh vegetables. For consumer convenience these products are packed in packagings allowing for heating or cooking of the food product contained therein without removal of the packaging.
  • EP 1 067 058 A1 discloses a packaging of the above type, in which the venting means is provided by means of a specifically designed heat-sealed area causing the packaging material to rupture at at least one point when an excess pressure occurs in the interior of the packaging during heating of the article of food contained therein in a microwave oven.
  • FR 27 96 047 A1 and JP 2001-240150 disclose a packaging of the above type, wherein the venting means is formed of a weak seal, which is broken when an excess pressure occurs in the interior of the packaging during heating of the article of food contained therein.
  • venting means is thus provided in the above known packagings by an excess pressure in the interior of the packaging causing a seal or the packaging material per se to rupture.
  • the venting means in fact opens at a predetermined excess pressure.
  • the object of the present invention is to provide a packaging of the above type which ensures a controlled opening of the venting means at a predetermined excess pressure in the interior of the packaging during heating of the article of food contained therein.
  • Another object of the invention is to provide a packaging having a venting means which is prevented from opening before the packed product is heated in an oven, such as a conventional oven, an IR oven or a microwave oven, said venting means further maintaining an excess pressure in the interior of the packaging during the heating process.
  • the packaging according to the invention is characterised in that the venting means is a pressure relief valve opening at a predetermined excess pressure generated in the inner chamber of the packaging, said valve including a first inner film provided with a first opening communicating with the inner chamber of the packaging, and a second outer flexible film covering the opening in the first inner film and connected thereto to form a channel portion between the inner and the outer films, said channel portion communicating with the surroundings of the packaging through a second opening being offset in relation to the first opening.
  • the venting means is a pressure relief valve opening at a predetermined excess pressure generated in the inner chamber of the packaging, said valve including a first inner film provided with a first opening communicating with the inner chamber of the packaging, and a second outer flexible film covering the opening in the first inner film and connected thereto to form a channel portion between the inner and the outer films, said channel portion communicating with the surroundings of the packaging through a second opening being offset in relation to the first opening.
  • the first film and the second film sealingly abut each other either directly or indirectly in the closed position of the valve so as to prevent an open connection between the first and second opening.
  • ambient air is thus prevented from penetrating into the interior of the packaging to the packed article of food.
  • the packaging and the article of food contained therein is heated, the article of food releases gases and the water present in the article of food evaporates, thus generating an excess pressure in the interior of the packaging.
  • the excess pressure causes the pressure relief valve to open at a predetermined excess pressure, gases and aqueous vapour penetrating into the channel portion through the first opening and further from the channel portion to the surroundings through the second opening.
  • the valve opens, the inner and outer films move away from each other due to the excess pressure in the channel, a certain excess pressure being maintained in the inner chamber of the packaging at the same time.
  • the internal excess pressure effects a rapid heating of the packed product.
  • the use of the present packaging may reduce the heating or cooking time of an article of food by 30 to 40% compared to the use of known packagings.
  • film should be understood in its widest sense, as it also covers mono films, multilayered co-extrudates and laminates.
  • a multi-layered packaging material having a pressure relief valve or one-way valve is thus known from EP 0 144 011 B2, EP 0 559 598 B1 and WO 88/07479.
  • DE 25 37 317 A1, EP 0 023 703 B1, EP 0 738 227, DE 44 35 492 A1 and EP 0 760 790 B1 disclose a pressure relief valve or a packaging having a pressure relief valve corresponding to the pressure relief valve of the packaging according to the present invention.
  • valve structures also may be used for packaging of articles of food which are to be heated in a microwave oven.
  • the amount of gases being emitted per time unit by for instance coffee is about 100 times less than the amount of gases and vapour typically being emitted by articles of food during heating thereof.
  • a person skilled in the art would thus not consider using the said known valve structures in packagings for articles of food, which are to be heated in a microwave oven.
  • the pressure relief valve of the packaging according to the invention has an initial pressure of between 5 and 100 mbars, most preferably of between 5 and 30 mbars.
  • a fluid is provided in the channel portion, preferably at least in the area adjacent the opening of the inner film.
  • the fluid may be an oil, preferably a vegetable oil or a silicon oil.
  • the fluid may include an antibacterial agent.
  • a fluid film in the channel portion aims to provide a secure closure of the channel, until the predetermined excess pressure is reached in the inner chamber of the packaging.
  • the fluid film may provide an interspacing between the inner and outer films allowing gases and aqueous vapour to penetrate into the channel portion when the predetermined excess pressure has been reached in the interior of the packaging.
  • the fluid may contain colloids, preferably of a size between 20 and 80 ⁇ m, and most preferably of a size between 40 and 60 ⁇ m.
  • the colloids provide an interspacing between the inner and the outer films in the channel portion, the fluid preventing an open connection between the inner outer openings in the closed position of the valve.
  • the interspacing between the inner and outer films ensures that the interior excess pressure in the packaging also acts on the fluid in the channel portion.
  • the internal pressure causes the heated film to be blown out of the channel through the outer opening, whereby a connection between the inner and outer openings is established.
  • the fluid may have a boiling point exceeding that of water such that during heating in an oven the fluid is heated to a higher temperature than the water contained in the packed article of food.
  • At least a partial fluid evaporation may take place in the channel during the initial heating process causing an earlier opening of the valve and at a lower excess pressure in the inner chamber of the packaging.
  • the above applies in particular when the fluid in the channel contains colloids providing an interspacing between the inner and the outer films.
  • the large amount of aqueous vapour released by the packed article of food during the continued heating process may more readily escape from the packaging through the valve.
  • Between 30 and 90% of the fluid in the channel portion is discharged during the initial evaporation of the fluid and the subsequent vapour outflow through the valve.
  • the pressure relief valve may be formed of the packaging material, which is a laminate formed of the first inner film and the second outer film being laminated together except in an unlaminated area forming the channel portion.
  • the size of the first inner film and the second outer film is substantially the same. However, it should be understood that one of these two films may be smaller than the other film transversely of the machine direction.
  • the first inner film of the pressure relief valve may be formed of the packaging material and the second outer film of the valve may be a label fixed to the outer surface of the packaging material, preferably by means of a pressure-sensitive adhesive.
  • the outer film of the pressure relief valve may be formed of the packaging material and the inner film of the valve may be a label fixed to the inner surface of the packaging material.
  • the pressure relief valve may be a label including the inner and outer films, said inner film fixed to the outer surface of the packaging material, preferably by means of a pressure-sensitive adhesive.
  • the opening of inner film moreover, being aligned with a third opening in the packaging material.
  • the pressure relief valve is entirely formed as a label fixed to the packaging material around an opening therein.
  • the label is attached during the manufacture of the packaging.
  • the pressure relief valve may be a label including the inner and outer films, said outer film fixed to the inner surface of the packaging material and being provided with an opening aligned with an opening in the packaging material.
  • the second opening through which the channel portion communicates with the surroundings of the packaging may be formed of at least one edge area of at least the outer film.
  • This embodiment of the invention is particularly advantageous when the outer film of the valve or the inner as well as the outer film of the valve is/are formed as a label.
  • the said embodiment may also be combined with the embodiment, in which the pressure relief valve is formed by means of an unlaminated area of the packaging material.
  • the interspacing between the first and the second openings may be between 2 and 40 mm, preferably between 2 and 25 mm, and most preferably between 2 and 10 mm.
  • the openings in the inner and outer films may be provided and shaped in many ways.
  • the openings may thus for instance be slits formed by means of a knife, perforations made by means of a needle and punched-out or laser-cut perforations of various shapes.
  • the inner film may be provided with two openings in the form of two parallel slits and the outer film may be provided with a slit-shaped opening arranged in parallel to and between the openings in the inner film.
  • the first embodiment shown in Figures 1 and 2 of a packaging according to the invention includes a bowl-shaped lower part 1 and a planar cover part 2.
  • the lower part 1 is rectangular and includes a bottom 3. Two pairs of opposing lateral walls 4, 5 and 6, 7 extend upwardly from the bottom 3. At their upper ends the lateral walls continue into a common flange 8.
  • the lower part 1 is typically made from polypropylene (PP) and made by thermoforming or injection moulding.
  • the planar cover part 2 is sealed to the flange 8 of the lower part 1 to form a closed inner chamber 16, in which the packed article of food 9 is housed.
  • the cover part 2 is made from a flexible packaging material, which is a laminate including a first inner film 10 and a second outer film 11. The two films are laminated together in their entirety except in an unlaminated area extending in the machine direction and forming a narrow channel 12 between the inner and outer films 10, 11.
  • Two parallel and mutually interspaced first openings in the form of slits 13, 14 are provided in the channel 12 in the inner film 10.
  • Another opening in the form of a slit 15 is provided in the outer film 11 between the inner slits 13, 14.
  • the slit 15 is parallel to the slits 13, 14 in the inner film 10.
  • the inner slits 13, 14 thus form a connection between the channel 12 and the inner chamber of the packaging.
  • the other slit 15 in the outer film 13 forms a connection between the channel 12 and the surroundings.
  • a fluid in form of silicon oil containing colloids 17 is provided in the channel adjacent the area of the slits 13, 14, 15.
  • the channel portion, in which the silicon oil containing colloids 17 is provided, is indicated by means of dots in Figure 1.
  • the colloids 17 keeps the inner and outer films 10, 11 slightly spaced apart in the said portions of the channel, while the silicon oil prevents an open connection between the inner openings 13, 14 and outer opening 15.
  • a one-way valve or a pressure relief valve 18 is thus provided by means of the channel, the slits 13, 14, 15 and the silicon oil with colloids.
  • the valve prevents ambient air from entering the inner chamber 16 of the packaging in the closed position of the valve as shown in Figure 2. However, the valve 18 is caused to open when a specific excess pressure is generated in the inner chamber 16 of the packaging.
  • Such an excess pressure is generated when the packaging and the article of food 9 packed therein are heated in a microwave oven.
  • the packed article of food 9 releases large amounts of aqueous vapour or steam which generate the excess pressure.
  • the aqueous vapour penetrates into the channel 12 and moves the inner and outer films 10, 11 further away from each other such that an open connection between the inner slits 13, 14 and the outer slit 15 is formed.
  • the aqueous vapour may escape from the inner chamber 16 of the packaging through the inner slits 13, 14, the channel area with the silicon oil and the outer slit 15.
  • a partial evaporation of the silicon oil takes place during the initial heating process in the microwave oven. The reason why is that the silicon oil is more polar than water and is thus heated more rapidly than the water contained in the packed article of food, which contributes to a faster opening of the valve.
  • the cover part 2 is provided with an additional pressure relief valve 18' corresponding to the pressure relief valve 18.
  • the venting capacity may be adjusted according to the amount of vapour or steam generated at the heating of the article of food.
  • the valve may be provided in non-laminated pockets between the outer and inner films 11, 10, even though the channel 12 is shown as a through-going channel. This feature may be obtained by laminating the two films in register.
  • the inner film 10 of the laminated packaging material 2 is typically a PE film (polyethylene film) or another sealing medium film sealable to the lower part 1.
  • a sealing medium may further be chosen, which seals peelably to the lower part 1, offering the consumer easy access to the heated product by peeling off the cover part 2.
  • the outer film 11 of the laminate 2 may for instance be OPP (oriented polypropylene), OPA (oriented polyamide) and PET (polyethylene terephthalate).
  • the inner film as well as the outer film of the cover 2 may be a multilayered film or a laminate and include a barrier layer or a metallisation layer. This also applies to the film used for the lower part 1.
  • the second embodiment shown in Figures 3 - 5 of a packaging according to the invention is formed as a bag.
  • the bag is made from a packaging material 20 having an inner sealing medium layer.
  • the bag has a back seal 21, a bottom seal 21 and a top seal 23.
  • the said three seals 21, 22, 23 are shaped as fin seals, ie the packaging material is sealed inner face to inner face.
  • the seals provide a sealed inner chamber 25 housing the article of food.
  • the article of food is not shown in Figures 3 - 5.
  • the bag packaging further includes a pressure relief or one-way valve 24 formed as a label.
  • the pressure relief valve or label 24 includes an inner annular film part 26 having a rectangular aperture 27.
  • the inner film part 26 is provided with a pressure-sensitive adhesive 28 by means of which it is fixed to the outer face 29 of the packaging material 20.
  • the inner film part of the label 24 is fixed to the packaging material 29 such that its rectangular aperture 27 is aligned with an aperture 30 formed in the packaging material.
  • On the side opposite the one containing the pressure-sensitive adhesive 28 the inner film part 26 is connected to an outer flexible film part 31.
  • the outer film part 31 has substantially the same contour as the inner film part 26.
  • the inner and the outer film parts 26, 31 are mutually connected in strip-shaped areas 32, 33 on either side of the rectangular aperture 27, whereby two channel portions 34, 35 are formed between the inner film part 26 and the outer film part 31.
  • the channel portions 34, 35 are open at the inner edges at the periphery of the aperture 27.
  • the channel portions are also open (at reference numerals 36, 37) at their outer edges at the outer periphery of the inner film part 26 and the outer film part 31, respectively.
  • silicon oil containing colloids is provided in these channel portions.
  • the valve 24 allows the aqueous vapour to escape when a specific excess pressure occurs in the packaging.
  • the vapour escapes through the aperture 30 in the packaging material 20 and through the rectangular aperture 27, where the pressure of the vapour acts on the silicon oil in the channel portions 34, 35 and on the outer flexible film part 31. This causes the outer film part 31 to move away from the inner film part 26 in the channel portions 34, 35.
  • the channel portions 34, 35 are thus opened between their inner edges and their outer edges. Consequently vapour may flow from the inner chamber of the packaging to the surroundings.
  • the inner film part 26 is omitted and the outer film part 31 is adhered directed onto the outer face of packaging material 20 in strip-shaped areas corresponding to the strip-shaped areas 32, 33.
  • the packaging material 20 and the outer film part 31 form the channel portions.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Package Specialized In Special Use (AREA)
EP02388075A 2002-11-22 2002-11-22 Lebensmittelverpackung zur Erwärmung in einem Ofen Withdrawn EP1422163A1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP02388075A EP1422163A1 (de) 2002-11-22 2002-11-22 Lebensmittelverpackung zur Erwärmung in einem Ofen
AU2003280319A AU2003280319A1 (en) 2002-11-22 2003-11-13 Food package for heating in an oven
PCT/DK2003/000779 WO2004048225A1 (en) 2002-11-22 2003-11-13 Food package for heating in an oven

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02388075A EP1422163A1 (de) 2002-11-22 2002-11-22 Lebensmittelverpackung zur Erwärmung in einem Ofen

Publications (1)

Publication Number Publication Date
EP1422163A1 true EP1422163A1 (de) 2004-05-26

Family

ID=32187287

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02388075A Withdrawn EP1422163A1 (de) 2002-11-22 2002-11-22 Lebensmittelverpackung zur Erwärmung in einem Ofen

Country Status (3)

Country Link
EP (1) EP1422163A1 (de)
AU (1) AU2003280319A1 (de)
WO (1) WO2004048225A1 (de)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004106190A1 (en) * 2003-05-30 2004-12-09 Micvac Ab Valve
EP1600399A1 (de) * 2004-05-27 2005-11-30 Haver & Boecker oHG Mit einem Schüttgut befüllbarer Sack aus Kunststofffolie
WO2006012282A1 (en) * 2004-06-25 2006-02-02 The Procter & Gamble Company Flexible laminate having an integrated pressure release valve
WO2006092562A1 (en) * 2005-03-03 2006-09-08 Ffp Packaging Solutions Limited Self-venting cover for heatable food package
WO2007006060A1 (de) * 2005-07-08 2007-01-18 Starlinger & Co Gesellschaft M.B.H. Entlüftbarer sack
WO2007020854A1 (ja) * 2005-08-16 2007-02-22 Toyo Seikan Kaisha, Ltd. 電子レンジ調理用包装容器
EP2070837A1 (de) * 2007-12-14 2009-06-17 SEDA S.p.A. Mehrschichtfolie für ein Mikrowellenbauteil
EP2157030A1 (de) * 2008-08-19 2010-02-24 Amcor Flexibles Transpac N.V. Verfahren zum Ventilschutz bei der Hitzebehandlung und atmungsaktiver Beutel mit dem Ventilschutzmechanismus
CH700481A1 (de) * 2009-02-26 2010-08-31 Micropast Gmbh Verfahren zum Haltbarmachen von Lebensmitteln.
US7927015B2 (en) 2004-05-27 2011-04-19 Jürgen Heinemeier Plastic bag with overpressure relief
ITVA20100086A1 (it) * 2010-11-30 2012-05-31 Masterpack S P A Sacchetto termosaldato per confezionamento di prodotti alimentari soggetti a rilascio di gas o vapori dopo sigillatura e nastro continuo per la formazione dei sacchetti
JP2013209128A (ja) * 2012-03-30 2013-10-10 Toppan Printing Co Ltd 蒸気抜き機能を有する蓋材
US8748786B2 (en) 2009-11-19 2014-06-10 Kraft Foods Group Brands Llc Multi-component food packaging for microwave oven
WO2016205649A1 (en) * 2015-06-18 2016-12-22 Ccl Label, Inc. Pre-oiled valve
US10009963B1 (en) 2017-04-17 2018-06-26 Silicon Valley Factory LLC Decoding a custom cooking program
US10061285B1 (en) 2017-04-17 2018-08-28 Silicon Valley Factory LLC Encoding a custom cooking program
US10070485B1 (en) 2017-04-17 2018-09-04 Silicon Valley Factory LLC Automatic heating system and method
US10101035B1 (en) 2017-04-17 2018-10-16 Silicon Valley Factory LLC Custom cooking program based on feedback
WO2018194715A1 (en) * 2017-04-17 2018-10-25 Silicon Valley Factory LLC Automatic heating system and method
US10120553B1 (en) 2017-04-17 2018-11-06 Sebastian Thrun User interface and controller for a heating system
US10155602B2 (en) 2005-02-10 2018-12-18 Conagra Foods Rdm, Inc. Magnetron control system and associated methodology

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Publication number Priority date Publication date Assignee Title
US8610039B2 (en) 2010-09-13 2013-12-17 Conagra Foods Rdm, Inc. Vent assembly for microwave cooking package
US8729437B2 (en) 2007-01-08 2014-05-20 Con Agra Foods RDM, Inc. Microwave popcorn package, methods and product
EP2157029A1 (de) 2008-08-19 2010-02-24 Amcor Flexibles Transpac N.V. Verfahren zur Herstellung einer selbstbelüftenden Verpackung
EP2272661A1 (de) * 2009-07-10 2011-01-12 Amcor Flexibles Transpac N.V. Verpackungsmaterial mit integriertem Druckentlastungsventil
CA2792969A1 (en) * 2010-03-19 2011-09-22 Tobias Schlegel Package for objects that have a portion of liquid
USD703547S1 (en) 2011-06-14 2014-04-29 Conagra Foods Rdm, Inc. Microwavable bag
USD671012S1 (en) 2011-06-14 2012-11-20 Conagra Foods Rdm, Inc. Microwavable bag
US9446893B2 (en) * 2012-04-29 2016-09-20 Vp Sheets Ltd. Sheet material with integrally formed one-way valve
USD743810S1 (en) 2013-03-01 2015-11-24 General Mills, Inc. Expandable gusseted sleeve for a pouch

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US4640838A (en) * 1984-09-06 1987-02-03 Minnesota Mining And Manufacturing Company Self-venting vapor-tight microwave oven package
WO1988007479A1 (en) * 1987-03-21 1988-10-06 Robert Bosch Gmbh Packaging receptacle with gas outlet vent
EP0661219A2 (de) * 1993-12-28 1995-07-05 Packs Co. Ltd. Vorrichtung zum Umhüllen
EP0915013A1 (de) * 1997-11-07 1999-05-12 Brodart S.A. Verfahren zum Deckelverschliessen von Behältern, Deckelfolie zum Durchführen dieses Verfahrens und so hergestelltes Produkt
FR2796924A1 (fr) * 1999-07-29 2001-02-02 Proplast Valve et emballage a valve,notamment pour cuisson d'aliments
EP1122189A1 (de) * 1998-05-27 2001-08-08 Morinaga Milk Industry Co., Ltd. Verpackungsmaterial sowie behälter zur aufnahme von getränken und nahrungsmitteln
JP2001301802A (ja) * 2000-04-27 2001-10-31 Mitsubishi Alum Co Ltd 蓋および容器
EP1157942A1 (de) * 2000-05-22 2001-11-28 KIM, Bang Hyun Verpackung zum Kochen von Nahrungsmitteln, mit eine Druckkontrollsystem

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Publication number Priority date Publication date Assignee Title
US4640838A (en) * 1984-09-06 1987-02-03 Minnesota Mining And Manufacturing Company Self-venting vapor-tight microwave oven package
WO1988007479A1 (en) * 1987-03-21 1988-10-06 Robert Bosch Gmbh Packaging receptacle with gas outlet vent
EP0661219A2 (de) * 1993-12-28 1995-07-05 Packs Co. Ltd. Vorrichtung zum Umhüllen
EP0915013A1 (de) * 1997-11-07 1999-05-12 Brodart S.A. Verfahren zum Deckelverschliessen von Behältern, Deckelfolie zum Durchführen dieses Verfahrens und so hergestelltes Produkt
EP1122189A1 (de) * 1998-05-27 2001-08-08 Morinaga Milk Industry Co., Ltd. Verpackungsmaterial sowie behälter zur aufnahme von getränken und nahrungsmitteln
FR2796924A1 (fr) * 1999-07-29 2001-02-02 Proplast Valve et emballage a valve,notamment pour cuisson d'aliments
JP2001301802A (ja) * 2000-04-27 2001-10-31 Mitsubishi Alum Co Ltd 蓋および容器
EP1157942A1 (de) * 2000-05-22 2001-11-28 KIM, Bang Hyun Verpackung zum Kochen von Nahrungsmitteln, mit eine Druckkontrollsystem

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004106190A1 (en) * 2003-05-30 2004-12-09 Micvac Ab Valve
US7927015B2 (en) 2004-05-27 2011-04-19 Jürgen Heinemeier Plastic bag with overpressure relief
EP1600399A1 (de) * 2004-05-27 2005-11-30 Haver & Boecker oHG Mit einem Schüttgut befüllbarer Sack aus Kunststofffolie
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