EP0513076A1 - Chauffage regle des denrees alimentaires a l'aide des micro-ondes. - Google Patents

Chauffage regle des denrees alimentaires a l'aide des micro-ondes.

Info

Publication number
EP0513076A1
EP0513076A1 EP19910902970 EP91902970A EP0513076A1 EP 0513076 A1 EP0513076 A1 EP 0513076A1 EP 19910902970 EP19910902970 EP 19910902970 EP 91902970 A EP91902970 A EP 91902970A EP 0513076 A1 EP0513076 A1 EP 0513076A1
Authority
EP
European Patent Office
Prior art keywords
article
layer
foodstuff
apertures
electroconductive material
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
EP19910902970
Other languages
German (de)
English (en)
Other versions
EP0513076B1 (fr
Inventor
D Gregory Beckett
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.)
Beckett Industries Inc
Original Assignee
Beckett Industries Inc
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
Priority claimed from CA002009207A external-priority patent/CA2009207A1/fr
Application filed by Beckett Industries Inc filed Critical Beckett Industries Inc
Publication of EP0513076A1 publication Critical patent/EP0513076A1/fr
Application granted granted Critical
Publication of EP0513076B1 publication Critical patent/EP0513076B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B65D2581/00—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
    • B65D2581/34—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
    • B65D2581/3401—Cooking or heating method specially adapted to the contents of the package
    • B65D2581/3402—Cooking or heating method specially adapted to the contents of the package characterised by the type of product to be heated or cooked
    • B65D2581/3405—Cooking bakery products
    • 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
    • B65D2581/00—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
    • B65D2581/34—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
    • B65D2581/3437—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 specially adapted to be heated by microwaves
    • B65D2581/3439—Means for affecting the heating or cooking properties
    • B65D2581/344—Geometry or shape factors influencing the microwave heating properties
    • 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
    • B65D2581/00—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
    • B65D2581/34—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
    • B65D2581/3437—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 specially adapted to be heated by microwaves
    • B65D2581/3463—Means for applying microwave reactive material to the package
    • B65D2581/3467—Microwave reactive layer shaped by delamination, demetallizing or embossing
    • 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
    • B65D2581/00—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
    • B65D2581/34—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
    • B65D2581/3437—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 specially adapted to be heated by microwaves
    • B65D2581/3471—Microwave reactive substances present in the packaging material
    • B65D2581/3472—Aluminium or compounds thereof
    • 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
    • B65D2581/00—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
    • B65D2581/34—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
    • B65D2581/3437—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 specially adapted to be heated by microwaves
    • B65D2581/3486—Dielectric characteristics of microwave reactive packaging
    • B65D2581/3489—Microwave reflector, i.e. microwave shield

Definitions

  • the present invention relates to the cooking of foodstuffs by microwave energy.
  • Some food products which are to be cooked by microwave energy are in the form of an outer pastry dough shell and an inner filling.
  • An example is an apple turnover.
  • One problem which has arisen when packages employing thin metal films to generate thermal energy to obtain crispening and browning of such products, is that there is a considerable moisture loss from the filling and sometime a spilling of filling as the shell splits open, leading to an unsatisfactory produc .
  • Such normally microwave-opaque electroconductive materials for example, aluminum foil, have been commonly-used to achieve shielding of foodstuffs from microwave radiation during microwave cooking, but are not known as being capable of converting any portion of the incident microwave radiation to thermal energy, in contrast to the very thin electroconductive material layers described in U.S. Patent No. 4,641,005 mentioned above.
  • the layer of flexible apertured electroconductive material For the layer of flexible apertured electroconductive material to be usefully incorporated into a packaging structure, it is essential that the layer of flexible electroconductive material be supported on and be in adhered structural relationship with a substrate layer of microwave energy transparent material.
  • a multiple layer article of manufacture adapted to be formed into a packaging structure in which a foodstuff may be heated by microwave energy to an edible condition.
  • a food product may be maintained in the same structure through the multiple steps of filling, freezing, storing, shipping, retailing and then microwave reconstitution for consumption, before discard.
  • the article of manufacture of the invention comprises a layer of flexible electroconductive material supported on a substrate layer.
  • the plurality of apertures is sized and arranged in the layer of flexible electroconductive material to generate sufficient thermal energy to effect a desired surface browning of the foodstuff while permitting sufficient microwave energy to penetrate the layer of flexible electroconductive material through the plurality of apertures into the foodstuff to effect a desired degree of dielectric heating of the foodstuff, whereby the foodstuff may be provided in an edible condition.
  • the substrate layer is formed of microwave energy transparent material and is in adhered structural supporting relationship with the flexible layer of electroconductive material so that a packaging structure may be formed from the article in which the foodstuff may be positioned.
  • the article described in '266 is a utensil for a microwave oven in the form of a slotted rigid stainless steel plate, whereas the article with which the present invention is concerned is suitable for formation of packaging material for foodstuffs, which enables the advantage of employing the same structure for the foodstuff through its multiple stages of processing from filling of the packaging structure to microwave reconstitution of the foodstuff to be realized.
  • the structure shown in '266 is not capable of utilization or adoption as a packaging structure and is employed solely during microwave reconstitution of the foodstuff;
  • the layer of apertured electroconductive material is a flexible material, such as aluminum foil, whereas the element that produces thermal energy in , 266 is described as load supporting and hence must be capable of supporting the load of the foodstuff to be heated.
  • the element takes the form of a rigid stainless steel plate.
  • the flexible electroconductive material layer used in the present invention is not itself load supporting, in the sense the term is used in
  • the flexible electroconductive material layer is supported on and adhered to a substrate layer of microwave transparent material.
  • packaging structures may be provided in which the foodstuff may be packaged from filling to consumption.
  • the article resulting from the combination of the flexible electroconductive material layer with the substrate layer may itself take a variety of physical forms, depending upon the packaging structures to be formed therefrom and the foodstuff to be packaged therein, including flexible, stiff or semi-stiff or rigid.
  • the , 266 patent discloses a second element, which is a member of microwave transparent material, which also is rigid and underlies the slotted stainless steel plate in the microwave oven cavity.
  • Figure 1 is a perspective view of a pot pie dish provided in accordance with one embodiment of the invention.
  • Figure 2 is a sectional view of the pot pie dish of Figure 1;
  • Figure 3 is a plan view of a blank from which the pot pie dish of Figure 1 is formed;
  • Figure 12 is a perspective view of a microwave bag provided in accordance with an additional embodiment of the invention.
  • a plurality of elongate apertures is formed through the electroconductive metal layer.
  • the metal or other electroconductive material shields the foodstuff from the passage of microwave energy therethrough while microwave energy is permitted to pass through the elongate apertures into the foodstuff.
  • a portion of the microwave energy passes through the apertures, producing an intense field at the periphery and access the whole dimension of each aperture, which, in turn, causes surface browning of the food.
  • the intensity of microwave energy reaching the foodstuff filling is considerably decreased by the shielding effect of the metal, while permitting browning and crispening of the exterior, so as to produce a cooked food product with much decreased moisture loss.
  • the proportion of incident microwave energy passing through the apertures into the foodstuff may be increased by making the gap wider, while making the gap longer and narrower increases the intensity of the surface heating.
  • the layer has a minimum thickness of about 1 micron.
  • the flexible electroconductive material layer conveniently may be provided by aluminum foil having a thickness of about 1 to about 15 microns in thickness, preferably about 3 to about 10 microns, typically about 7 to about 8 microns.
  • Other suitable electroconductive materials include stainless steel, copper and carbon.
  • the layer of electroconductive material is provided with a plurality of elongate thermal energy- generating apertures therethrough.
  • the number, size and relative location of the elongate apertures depends on the size of the foodstuff and the degrees of internal cooking and of surface browning desired.
  • Each aperture is elongate and may comprise a single opening formed into a spiral or other pattern so as to have the physical appearance of a plurality of apertures.
  • Each aperture of the plurality of apertures generally is no shorter than about 1.75 cm and may extend for any desirable length.
  • An aperture generally varies in width from about 1 mm to about 2 cm, provided that the length is greater than the width. In general, more surface heating of the foodstuff is achieved as the apertures become longer and narrower. As the apertures become wider, more microwave energy is able to pass through into the interior of the foodstuff, so that less intense heat generation and less shielding of the microwave energy from penetration to the foodstuff result.
  • a metal spacing of at least about 0.5 mm is maintained between individual apertures or between portions of the same aperture.
  • the apertures may be equally dimensioned and equally spaced apart, which produces an even degree of heating over the expanse of the continuous layer of electroconductive material containing such plurality of apertures.
  • the dimensions and spacing of individual ones or groups of the plurality of apertures may be varied and may be located only in selected portions of the expanse of the continuous layer of electroconductive material, so as to achieve differential degrees of heating, differential ratios of internal and surface heating and shielding only, as desired, in various locations of the expanse of the layer of electroconductive material.
  • the number, location and size of the apertures may be such as to achieve any desirable combination of microwave energy reflected, transmitted and converted into thermal energy for the packaging structure, both in the overall structure and locally within the structure.
  • the elongate apertures may be formed in the continuous flexible electroconductive material layer in any convenient manner, depending on the nature of the electroconductive material and the physical form of the electroconductive material.
  • the apertures may be stamped out using suitable stamping equipment, and then adhered to the substrate layer.
  • the apertures may be formed by selective demetallization of metal from the polymeric film using, for example, the procedures described in U.S. Patents Nos.
  • a polymeric lacquer or other detackifying material may be applied over the exposed surfaces of laminating adhesive in the selectively demetallized electroconductive layer to inhibit adjacent layers from adhering to one another as a result of exposed adhesive in the apertures, when a web of such selectively demetallized material is rolled up, as is often the case prior to formation of the desired packaging material.
  • the layer of flexible electroconductive material also may be laminated between two outer paper or paperboard layers, or may be laminated between a heat resistant polymeric material layer, and a paper or paperboard layer.
  • the polymeric material layer such as polyester or polyethylene, may be flexible or rigid.
  • the flexible layer of electroconductive material may be laminated to a single or between two rigid thermoformable polymeric material layer(s), by adhesive bonding, and the laminate may be thermoformed to the desired product shape.
  • the multiple layer article of manufacture of the present invention may be incorporated into a variety of packaging structures for housing foodstuffs where the generation of thermal energy during microwave heating is desired.
  • the structures may include a variety of trays and dishes, such as disposable pot pie dishes and rigid reusable trays or dishes, a variety of bag structures, such as french fry bags and bags for cooking crusty filled products, for example, an apple turnover, a variety of box structures, such as pizza boxes, and domestic ware, such as reusable or disposable plates and dishes.
  • the packaging structure generally conforms to the physical three-dimensional form of the foodstuff, whether in the form of relatively stiff or rigid dish or tray, or in the form of a flexible bag structure, to enable the desired microwave heating of the foodstuff to be achieved. It may be desirable to provide a layer of release material on food-contacting surfaces of the structure, to inhibit sticking of food to such surfaces.
  • DESCRIPTION OF PREFERRED EMBODIMENTS Referring first to Figures 1 to 3, there is shown therein a pot pie dish 10 constructed in accordance with one embodiment of the invention. ( Figure 3 shows the blank for the dish 10 prior to stamping or other suitable forming operation) .
  • the dish is of conventional shape, having a circular base 12, an upwardly and outwardly flared side wall 14 and an outwardly-extending lip 16.
  • the pot pie dish 10 is formed from a laminate of an outer layer 18 of paperboard of suitable thickness to provide structural support to the dish 10, an inner layer 20 of heat-resistant polymeric film and a layer 22 of aluminum foil or similar flexible microwave-opaque electroconductive material sandwiched therebetween.
  • the layer 22 of aluminum foil has a plurality of elongate narrow thermal energy-producing apertures 24 formed therethrough.
  • the apertures 24 are provided in a star-like array in the aluminum foil layer, with arms radiating in a uniform pattern from the centre of the base 12 of the dish.
  • the presence of the microwave-opaque aluminum foil in the side wall 14 limits the proportion of the incident microwave energy which can pass through the side wall 14 into the contents of the pot pie dish.
  • the pot pie may be cooked by microwave energy for consumption and an adequate degree of browning both to the side wall and bottom of the pot pie achieved, without overcooking the pie filing and causing significant moisture loss.
  • the apertures 24 are rectangular in outline shape and are of the same width, although differing in length and having a significantly longer longitudinal dimension than transverse dimension.
  • Figures 4, 5 and 6 illustrate alternative arrangements of apertures in a blank from which a pot pie dish may be formed by a suitable forming operation, in which the apertures are elongate and of regular geometric shape but not rectangular.
  • the apertures 24 are formed as a plurality of series of concentric rings.
  • the apertures 24 are formed in the shape of two discontinuous spirals.
  • the aperture 24 takes the form of a single spiral, with an additional small counter-spiral formed near the center to enhance thermal energy generation at that location.
  • Figures 10 and 11 illustrate further alternative structures for the arrangement of apertures. Each of the arrangements of apertures shown in Figures 1 to 11 is useful for a microwave oven pot pie dish. The specific arrangement employed, or whichever alternative arrangement is employed, depends on the desired proportion of incident microwave energy to be converted into thermal energy, to be reflected by the microwave-opaque aluminum foil or to be permitted to pass through into the pie filling.
  • a bag structure 40 for heating a foodstuff by microwave energy such as french fries or apple turnovers.
  • the bag structure is formed of a laminate of outer and inner layers of paper and a layer of aluminum foil or similar flexible microwave-opaque electroconductive material sandwiched therebetween.
  • a plurality of elongate thermal energy-generating apertures 42 is formed through the aluminum foil in a regular parallel array.
  • the laminate may comprise only one side of the bag structure.
  • the desired outer crispening of the foodstuff by thermal energy produced in the apertures 42 may be achieved while the shielding effect of the remainder of the continuous aluminum foil layer slows down the heating of the interior of the foodstuff, decreasing moisture loss and avoiding boil- over.
  • Various modifications to the numbers, geometry, dimensions and spacing of the apertures 42 may be effected, along the lines discussed above with respect to the pot pie dish structure of Figures 1 to 11, to achieve any desired microwave heating effect with respect to the foodstuff packaged in the bag structure.
  • a chicken pot pie was cooked for 6 minutes in a standard microwave oven packaged in a pot pie dish as illustrated in Figure 1 and also as illustrated in my aforementioned copending U.S. patent application No. 442,153 ("Pot Pie Dish").
  • a vegetable pastry was cooked for 3% minutes in a microwave oven in a bag structure as illustrated in Figure 11 and in a bag structure as illustrated in my copending U.S. patent application Serial No. 421,668 filed October 16, 1989 ("Ele-Met Bag”), the disclosure of which is incorporated herein by reference.
  • the product was cooked, ready to eat and had a browned exterior.
  • the moisture loss was 14%, as compared with 26% for the prior structure, i.e. considerably less in the case of the present invention.
  • the present invention provides a novel structure which is able to control the flow of microwave radiation to a foodstuff, so as to control the degree of cooking and the ratio of internal to external cooking. Modifications are possible within the scope of this invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Package Specialized In Special Use (AREA)
  • Cookers (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Laminated Bodies (AREA)

Abstract

On décrit une nouvelle structure destinée à la cuisson par micro-ondes des denrées alimentaires de consommation. La structure comprend une couche (22) d'un matérau électroconducteur souple qui est normalement opaque au rayonnement des micro-ondes et qui est traversé par une pluralité d'ouvertures allongées (24) dimensionnées pour permettre aux micro-ondes de pénétrer jusqu'à l'intérieur des aliments et de produire de l'énergie thermique à la surface de ceux-ci. On peut ainsi obtenir à la fois un effet de blindage anti-micro-ondes et un double effet de chauffage par micro-ondes et par énergie thermique, ce qui permet un réglage rapproché du type et de l'étendue de la cuisson par micro-ondes recherchée. La couche (22) de matériau électroconducteur souple est soutenue par un substrat (18), et collée à celui-ci, le substrat étant exécuté dans un matériau transparent aux micro-ondes. L'article fabriqué multi-couche ainsi formé est apte à servir de structure d'emballage dans laquelle des denrées alimentaires peuvent être chauffées par micro-ondes jusqu'à ce qu'elles soient prêtes à la consommation.
EP91902970A 1990-02-02 1991-01-31 Chauffage regle des denrees alimentaires a l'aide des micro-ondes Expired - Lifetime EP0513076B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
CA002009207A CA2009207A1 (fr) 1990-02-02 1990-02-02 Cuisson controlee des aliments par miro-ondes
CA200920 1990-02-02
US53516890A 1990-06-08 1990-06-08
US535168 1990-06-08
PCT/CA1991/000031 WO1991011893A1 (fr) 1990-02-02 1991-01-31 Chauffage regle des denrees alimentaires a l'aide des micro-ondes

Publications (2)

Publication Number Publication Date
EP0513076A1 true EP0513076A1 (fr) 1992-11-19
EP0513076B1 EP0513076B1 (fr) 1996-08-28

Family

ID=25673922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91902970A Expired - Lifetime EP0513076B1 (fr) 1990-02-02 1991-01-31 Chauffage regle des denrees alimentaires a l'aide des micro-ondes

Country Status (8)

Country Link
EP (1) EP0513076B1 (fr)
JP (1) JPH05500133A (fr)
AR (1) AR246491A1 (fr)
AT (1) ATE142073T1 (fr)
AU (1) AU645777B2 (fr)
DE (1) DE69121698T2 (fr)
NZ (1) NZ236962A (fr)
WO (1) WO1991011893A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992014864A2 (fr) 1991-02-14 1992-09-03 Beckett Industries Inc. Procede et appareil de demetallisation selective et produits ainsi obtenus

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5185506A (en) * 1991-01-15 1993-02-09 Advanced Dielectric Technologies, Inc. Selectively microwave-permeable membrane susceptor systems
CA2046836C (fr) * 1991-05-06 2000-04-04 D. Gregory Beckett Boite a pizza
GB9201932D0 (en) * 1992-01-29 1992-03-18 Beckett Ind Inc Novel microwave heating structure
US5800724A (en) * 1996-02-14 1998-09-01 Fort James Corporation Patterned metal foil laminate and method for making same
IN185348B (fr) 1997-05-19 2000-12-30 Commw Scient Ind Res Org
AU742877B2 (en) * 1997-05-19 2002-01-17 Commonwealth Scientific And Industrial Research Organisation Microwave browning of vegetables
US6492009B1 (en) * 2001-09-20 2002-12-10 Graphic Packaging Corporation Manufacture and method for obtaining accurately dimensioned features from a metal-containing web processed with a continuous etch process
DE10221471B4 (de) * 2002-05-15 2005-08-25 Rational Ag Gargutträger mit zumindest einer Kontaktfläche
CA2557267C (fr) 2004-03-01 2013-04-23 Kraft Foods Holdings, Inc. Ensemble de preparation d'aliment a usages multiples
WO2007106353A2 (fr) 2006-03-10 2007-09-20 Graphic Packaging International, Inc. Contenant a bande hyperfrequence interactive
CA2676131C (fr) * 2007-01-22 2012-11-20 Graphic Packaging International, Inc. Contenant allant au micro-onde et chauffant de maniere egale
EP2296999B1 (fr) 2008-07-11 2014-03-05 Graphic Packaging International, Inc. Contenant pour chauffage par micro-ondes

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845266A (en) * 1973-07-09 1974-10-29 Raytheon Co Microwave cooking utensil
FR2359695A1 (fr) * 1976-07-27 1978-02-24 Commissariat Energie Atomique Piece de revolution de forme plate obtenue par enroulement d'un filament impregne d'un polymere durcissable
US4268738A (en) * 1977-09-28 1981-05-19 The Procter & Gamble Company Microwave energy moderator
CA1153069A (fr) * 1979-03-16 1983-08-30 Oscar E. Seiferth Recipient pour cuisson par micro-ondes
GB2211380A (en) * 1987-10-21 1989-06-28 Int Paper Co Flexible package for microwave cooking
US4896009A (en) * 1988-07-11 1990-01-23 James River Corporation Gas permeable microwave reactive package

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9111893A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992014864A2 (fr) 1991-02-14 1992-09-03 Beckett Industries Inc. Procede et appareil de demetallisation selective et produits ainsi obtenus

Also Published As

Publication number Publication date
WO1991011893A1 (fr) 1991-08-08
NZ236962A (en) 1993-08-26
AR246491A1 (es) 1994-08-31
ATE142073T1 (de) 1996-09-15
DE69121698T2 (de) 1997-03-20
DE69121698D1 (de) 1996-10-02
AU645777B2 (en) 1994-01-27
AU7150291A (en) 1991-08-21
JPH05500133A (ja) 1993-01-14
EP0513076B1 (fr) 1996-08-28

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