EP0022830A1 - Plat isole et couvercle pour la cuisson par micro-ondes - Google Patents

Plat isole et couvercle pour la cuisson par micro-ondes

Info

Publication number
EP0022830A1
EP0022830A1 EP80900230A EP80900230A EP0022830A1 EP 0022830 A1 EP0022830 A1 EP 0022830A1 EP 80900230 A EP80900230 A EP 80900230A EP 80900230 A EP80900230 A EP 80900230A EP 0022830 A1 EP0022830 A1 EP 0022830A1
Authority
EP
European Patent Office
Prior art keywords
vessel
double
recited
container
rim
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.)
Ceased
Application number
EP80900230A
Other languages
German (de)
English (en)
Other versions
EP0022830A4 (fr
Inventor
Walter Kingdon Haverland, Jr.
Patricia Lynn Haverland
Original Assignee
HAVERLAND PATRICIA LYNN
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 HAVERLAND PATRICIA LYNN filed Critical HAVERLAND PATRICIA LYNN
Publication of EP0022830A1 publication Critical patent/EP0022830A1/fr
Publication of EP0022830A4 publication Critical patent/EP0022830A4/fr
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
    • A47J36/04—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay the materials being non-metallic
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
    • A47J36/027—Cooking- or baking-vessels specially adapted for use in microwave ovens; Accessories therefor

Definitions

  • This invention pertains generally to the field of apparatus for food and beverages, more particularly to cookware and dishes for cooking, warming, serving, storing, and refrigerating foods and beverages, and especially to cookware designed for use with microwave ovens and induction heating devices.
  • One conventional solution to this problem is to return the container to the oven, or to employ a hot plate or warming device, and to subject the food to low intensity heat to keep it warm during the meal.
  • This solution entails the necessity of having such a heating device proximately available during the meal, and it normally causes the food to suffer deterioration in quality.
  • the problem of handling hot dishes during a meal may be alleviated by transferring the cooked food from the cooking vessel to a serving dish to be placed on the dining table. This causes the food to cool even more rapidly, since it loses heat immediately upon contact with the dish. The dish can be warmed in advance in a heating device to offset this cooling partially. Such pre-heating may result again in the danger of having a hot dish on the dining table.
  • Thermos bottles and double-walled insulating dishes have been used to store and handle hot (and cold) foods and beverages to maintain their temperature at a constant level over an extended period of time.
  • Such containers are unsuitable for cooking food in conventional stoves or ovens because of the thermal resistance of the container walls to heat flow, which is the primary physical mechanism for heating the food in these ovens.
  • double boilers are double-walled containers in which the food is cooked by heating a liquid residing in the space between the walls, and therefore these boilers do not alleviate the problems of handling hot containers or rapid cooling of the food because of the low thermal resistance of their walls.
  • microwave ovens offer advantages over conventional ranges which could solve the problems discussed above.
  • a microwave oven heats or cooks the food by induction heating through the direct application of microwave radiation inside the oven.
  • the cooking vessels used in these ovens are fabricated from materials which are generally transparent to this radiation, such as polycarbonate or polysulfone plastic. The radiation therefore heat the food directly without heat flow through the container walls.
  • the container itself becomes hot during the cooking process, since it is in contact with the food.
  • a double-walled vessel can be used to cook or heat food in a microwave oven, and when it is removed the outer wall will remain cool to the touch and the food will remain hot in the dish for an extended period of time.
  • An alternative version of such a double-walled microwave cooking vessel has an inner wall that is constructed out of a material which absorbs microwave radiation and is thermally conductive, or partially conductive.
  • the inner surface is heated by the radiation, and it cooks or heats the food by conduction.
  • a conventional double-walled dish must be provided with sturdy mechanical supports to resist this wall deformation. This may be accomplished by designing the walls to be very thick, or by filling the space between them with a mechanically strong heat-insulating material, or even by providing support struts across this space. These measures result in a heavier, bulkier, and costlier dish with decreased thermal insulating efficiency and less food capacity, and some residual wall deformation.
  • An alternative measure is to provide vent holes to allow air to escape from the interior of the gap upon heating, thereby relieving much of the stress in the walls.
  • foreign material may enter the gap through these holes, and water may become trapped there when the dish is washed. This again reduces the thermal insulating effi ciency of the dish, and further leads to a cleaning problem for the gap interior.
  • no satisfactory design has been found for heat insulated cookware, despite many past attempts.
  • a further problem with conventional dishes is that space in most ovens is generally limited, and it is often difficult to fit more than one dish inside. It is desirable to. provide a lid for oven cookware so that the containers can be stacked on each other in order to cook more than one food in the oven simultaneously.
  • conventional lids for such cookware have handles or other upward projections which preclude the stacking of these dishes.
  • the present invention is a dish for cooking, storing and serving of foods and beverages.
  • This dish is particularly suitable for cocking or heating with microwave ovens or other induction heating devices.
  • the dish is a double-walled vessel with a narrow air space between the wails to provide thermal insulation.
  • the inner vessel is supported by a flange around its upper rim extending outward and resting on the rim of the outer container, thereby allowing the two vessels to be separated easily.
  • the rim of the outer vessel fits into a groove on the underside of this flange.
  • the rim and groove are designed to allow air to escape from the space between the walls while the food is being cooked, and to form a seal which prevents the influx of air into the gap after the dish is removed from the oven.
  • the dish is further provided with a lid which rests on the rim of the inner vessel and is raised above this rim.
  • the lid has a handle which is recessed into this raised space, so that the upper surface of the lid is flat with no upward projection
  • a second object of this invention is to provide a heat insulated container for cooking and heating foods and beverages in a microwave oven, such that the temperature of the heated contents will be maintained at a constant level for an extended .period of time when the container is removed from the oven.
  • Another object of this invention is to provide a heat insulated container for cooking and heating foods and beverages in a microwave oven, such that the container is relatively light-weight, thin-walled, non-bulky, simple and inexpensive in construction, and unsusceptible to thermal deformation.
  • Another object of this invention is to provide a container for cooking and heating foods and beverages that is aesthetically and functionally suitable for serving and storing the contents during and after a meal.
  • a further object of this invention is to provide a container for cooking and storing foods and beverages with a lid such that a plurality of containers may be stacked on each other in order to conserve space.
  • Figure 1 is a plan view of the preferred embodiment of an assembled heat insulated cookware container with a lid.
  • Figure 2 is a sectional elevation view of the container taken along the lines 2 - 2 in Figure 1, showing the double-walled construction of the container with the lid in place.
  • Figure 3 is a magnified fragmentary view of the rim. and groove forming the joint between the inner and outer vessels in Figure 2.
  • Figure 4 is a sectional elevation view of the lid taken along the lines 4 - 4 in Figure 1, showing the construction of the recessed handle.
  • Figure 5 shows an exploded view of the container assembly in this embodiment.
  • the preferred embodiment of this invention comprises three distinct parts: an outer jacket vessel 1, an inner liner vessel 2, and a lid 9 .
  • the jacket and liner are thin-walled vessels having substantially similar geometric shapes and being open on top.
  • the liner vessel is slightly smaller to allow it to fit into the jacket vessel with sufficient clearance to leave a narrow gap 3 between the walls of the two vessels.
  • the upper rim of the liner vessel has a flange 4 extending outward from this rim around its circumference, projecting sufficiently far to cover entirely the rim of the outer jacket vessel 8 when the two vessels are nested together.
  • this flange is provided with inner and outer parallel ridges, 5 and 6 respectively, around the circumference., extending a short distance downward, with a narrow groove 7 between them. These ridges are located such that the upper rim of the outer vessel 8 fits snugly into the groove 7 when the vessels are nested.
  • the inner liner vessel is supported solely by this flange groove resting on the upper rim of the outer jacket vessel.
  • the portion of the rim 8 lying between the ridges 5 and 6 is slightly wedge-shaped; that is, the inner and outer lateral surfaces of this rim between the ridges are slightly oblique relative to each other, so that the upper edge of the rim is slightly thinner than the wall in the main body of the outer vessel.
  • the lateral surfaces of the ridges adjacent to the groove are beveled correspondingly parallel to these oblique rim surfaces, so that the inner and outer lateral surfaces of the rim-and the ridges fit flush against each other when the dish is assembled.
  • This design of the flange groove and rim has the desirable feature of one-way action on the air in the space3 between the two vessels.
  • the inner liner wall becomes hot, and the temperature and pressure of the air in this gap increase. This pressure tends to force the liner vessel upward, dislodging the flange from the rim slightly and allowing the heated air to escape across the groove joint. The stresses in the. walls produced by the air pressure are thereby relieved.
  • the dish is removed from the oven and the air in this space begins to cool, its pressure falls below that of the atmosphere.
  • a lid 9 is also provided, fitting over the open top of the inner liner vessel and having a flange 10 around its circumference extending a short distance outward and resting on the upper rim of this vessel, which is the upper surface of the flange 4, when the lid is in place.
  • the lid arches upward from this flange, and the central portion of the lid has a flat upper surface which is raised above the level of the flange 10 .
  • In the center of the lid is an indented region where the surface is recessed below this flat upper surface, forming a well 11.
  • a thin vertical slab 12 extends across, and projects upward from, the bottom of well, and the upper edge of this slab lies flush in the plane of the flat upper surface of the lid. The slab thereby forms a recessed handle for the lid.
  • This lid design allows the flat bottom of one dish to be placed on the flat lid surface of another dish, so that the dishes can be stacked to achieve greater economy of space.
  • the raised lid ensures that there is sufficient space between the contents of stacked dishes so that when they are placed in a microwave oven these contents will cook simultaneously. With several such dishes it is possible thereby to utilize the cooking space in the microwave oven with maximum efficiency.
  • a preferred material for this dish is polysulfone plastic, sold by Union Carbide Corporation under the trademark Udel.
  • the components of the container may be fabricated from this plastic by the injection mold process, a technique which is well-known to persons skilled in the relevant art.
  • This material has the features of being transparent to microwave radiation, safe in contact with foods, resistant to chemical attack by grease, and aesthetically pleasing in appearance.
  • the material is further able to withstand temperatures as high as 204 degrees Centigrade, and indeed the dish may be used even to cook foods in conventional ovens up to this temperature.
  • the material is strong, rigid, and resistant to mars and scratches.
  • the invention is not limited in any way to this material, and embodiments employing all other suitable materials are included in its scope.
  • the material must be nonmetallic, and it should be preferably non heat conducting. From the above description, it is seen that this invention is suitable for serving food during a meal and for storing food as well as for cooking or heating.
  • the inner liner vessel may be removed with the lid and contents stored in a refrigerator, while the outer jacket vessel may be used for any other purpose, such as cooking with another liner vessel. With several such dishes the liner and jacket vessels may be used interchangeably, providing great flexibility and convenience.
  • This invention provides a means for cooking, serving and storing foods and beverages in a single container. This feature, as well as the desirable heat insulating properties of the dish, make it a very useful cookware device.

Abstract

Recipient thermiquement isole pour la cuisson, le service et l'emmagasinage d'aliments et de boissons, particulierement destines a etre utilises dans des unites de cuisson aux micro-ondes. Un recipient a double paroi, comprend un chemisage externe (1) et une doublure detachable interne (2), les deux ayant des formes sensiblement similaires. La doublure est supportee par une collerette rainuree (4) s'etendant vers l'exterieur depuis son bord superieur qui repose sur le bord superieur du recipient externe. Les parois interne et externe sont separees par un espace etroit (3) formant une cavite d'air enfermee. La rainure de collerette (7) et le bord sont destines a permettre a l'air de s'echapper de la cavite afin de limiter la pression engendree par les nourritures ou boissons chaudes du recipient et d'empecher l'air de penetrer dans la cavite pendant que le recipient se refroidit. Un couvercle sureleve (9) est egalement prevu et s'ajuste sur le recipient de doublure interne, et presente une partie superieure plate et une poignee dans un renfoncement (12) afin de permettre a plusieurs recipients d'etre empiles les uns sur les autres pour la cuisson et le stockage.
EP19800900230 1979-01-12 1980-07-29 Plat isole et couvercle pour la cuisson par micro-ondes. Ceased EP0022830A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US287579A 1979-01-12 1979-01-12
US2875 1979-01-12

Publications (2)

Publication Number Publication Date
EP0022830A1 true EP0022830A1 (fr) 1981-01-28
EP0022830A4 EP0022830A4 (fr) 1981-06-16

Family

ID=21702957

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800900230 Ceased EP0022830A4 (fr) 1979-01-12 1980-07-29 Plat isole et couvercle pour la cuisson par micro-ondes.

Country Status (2)

Country Link
EP (1) EP0022830A4 (fr)
WO (1) WO1980001483A1 (fr)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4317017A (en) * 1981-03-03 1982-02-23 Raytheon Company Microwave steamer
US4439656A (en) * 1981-04-06 1984-03-27 The Stouffer Corporation Apparatus and method for the reconstitution of frozen foods in a microwave oven
US4532397A (en) * 1982-07-06 1985-07-30 Rubbermaid Incorporated Ovenware receptacle system
US4563561A (en) * 1984-05-10 1986-01-07 Rubbermaid Incorporated Microwave ovenware assembly for popping grain
AU579542B2 (en) * 1984-12-10 1988-11-24 House Food Industrial Company Limited Container heated by microwave oven
FR2586921B1 (fr) * 1985-09-06 1988-04-29 Esswein Sa Dispositif pour cuire et brunir les produits dans un four a micro-ondes, et four muni d'un tel dispositif
GB2214631B (en) * 1987-02-02 1992-04-01 Keith Barnwell Heat treatment cup for a beverage container
DE8707187U1 (fr) * 1987-02-20 1987-07-16 Emsa-Werke Wulf Gmbh & Co, 4407 Emsdetten, De
DE3913707C2 (de) * 1989-04-26 1998-01-29 Amc Int Alfa Metalcraft Corp Doppelwandiger Kochtopf
DE4108766C2 (de) * 1991-03-18 1996-08-01 Knapp Guenter Univ Prof Dipl I Vorrichtung zum Erhitzen von Substanzen unter Entstehung hoher Drücke im Mikrowellenfeld
WO2002085718A2 (fr) * 2001-04-25 2002-10-31 Robert Pappler Recipient pour aliments conçu en particulier pour servir, conserver et transporter des aliments, procede de fermeture d'un recipient et systeme adequat de repartition d'aliments
US9675946B2 (en) * 2010-12-29 2017-06-13 Whirlpool Corporation Mixing bowl liner and lid
DE102011079411A1 (de) * 2011-07-19 2013-01-24 BSH Bosch und Siemens Hausgeräte GmbH Lebensmittelbehälter
FR3000889B1 (fr) * 2013-01-16 2015-02-27 Mastrad Contenant destine a recevoir des produits alimentaires
CN205037382U (zh) * 2015-09-14 2016-02-17 佛山市顺德区汉蒲电器科技有限公司 一种改进的可拆式微波烤盘
CN107669133B (zh) * 2017-11-10 2020-06-16 王晓作 微波炉保温料理煲玻璃内胆与壳体的固定装置
CN107917575B (zh) * 2017-11-16 2020-02-28 合肥华凌股份有限公司 解冻装置和具有其的冰箱
CN107906841B (zh) * 2017-11-16 2020-04-17 合肥华凌股份有限公司 解冻装置以及具有其的冰箱
CN107996674B (zh) * 2017-11-24 2021-07-23 合肥华凌股份有限公司 解冻装置和制冷设备
CN110115486B (zh) * 2018-02-05 2022-03-22 佛山市顺德区美的电热电器制造有限公司 上内胆和烹饪器具

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3083284A (en) * 1961-02-06 1963-03-26 Gen Electric Electronic cooking apparatus

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US1499364A (en) * 1924-07-01 Cooking vessel
US1330868A (en) * 1915-09-18 1920-02-17 Cleveland Metal Products Co Cooking utensil
US1541799A (en) * 1924-02-08 1925-06-16 Ethel C Dodge Compartment steam cooker
US2298814A (en) * 1939-01-25 1942-10-13 Albert M Weis Casserole
US2681211A (en) * 1953-01-19 1954-06-15 Marguerette E Reynolds Food mixer
US3302632A (en) * 1963-12-06 1967-02-07 Wells Mfg Company Microwave cooking utensil
US3365092A (en) * 1965-12-06 1968-01-23 Anna M. Blessing Insulated food container
US3349941A (en) * 1966-04-25 1967-10-31 Illinois Tool Works Compartmented container package
US3741427A (en) * 1971-02-08 1973-06-26 Continental Can Co Double boiler food tray
US3745290A (en) * 1972-03-01 1973-07-10 Gen Electric Inductively heatable utensils or vessels for heating,serving and storing food
US3794090A (en) * 1972-07-14 1974-02-26 Mobil Oil Corp Covered container for serving food
US4047633A (en) * 1976-09-23 1977-09-13 Dart Industries Inc. Ice container

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3083284A (en) * 1961-02-06 1963-03-26 Gen Electric Electronic cooking apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO8001483A1 *

Also Published As

Publication number Publication date
EP0022830A4 (fr) 1981-06-16
WO1980001483A1 (fr) 1980-07-24

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19810901