GB2307160A - Microwave dish - Google Patents

Microwave dish Download PDF

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Publication number
GB2307160A
GB2307160A GB9623118A GB9623118A GB2307160A GB 2307160 A GB2307160 A GB 2307160A GB 9623118 A GB9623118 A GB 9623118A GB 9623118 A GB9623118 A GB 9623118A GB 2307160 A GB2307160 A GB 2307160A
Authority
GB
United Kingdom
Prior art keywords
microwave
region
dish
layer
main region
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Withdrawn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
GB9623118A
Other versions
GB9623118D0 (en
Inventor
James Connolly
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB9623118D0 publication Critical patent/GB9623118D0/en
Publication of GB2307160A publication Critical patent/GB2307160A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/647—Aspects related to microwave heating combined with other heating techniques
    • H05B6/6491—Aspects related to microwave heating combined with other heating techniques combined with the use of susceptors
    • H05B6/6494—Aspects related to microwave heating combined with other heating techniques combined with the use of susceptors for cooking
    • 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
    • B65D2581/3406—Pizza or bread
    • 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
    • B65D2581/3441—3-D geometry or shape factors, e.g. depth-wise
    • 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
    • B65D2581/347—Microwave reactive material moulded with the container, e.g. as a filler in thermoplastics
    • 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
    • B65D2581/3477—Iron 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
    • B65D2581/3494—Microwave susceptor

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Ovens (AREA)
  • Cookers (AREA)

Abstract

A microwave dish is disclosed comprising a base (11) having a layer (13) incorporating a microwave heatable material, ferrite. The layer has a main region (15) towards the centre of the layer and a peripheral region (14). The main region has a greater proportion of microwave heatable material than the peripheral region so that in use a greater amount of microwave radiation is absorbed by the main region than by the peripheral region.

Description

Microwave Dish The present invention relates to a microwave dish.
It has long been a problem, when cooking a circular food product in a microwave oven, that the periphery of the food product tends to cook faster than the centre causing the food product to cook unevenly. This is a particular problem when cooking a product such as pizza.
It is an object of the present invention to mitigate this problem.
According to the present invention there is provided a microwave dish comprising a base having a layer incorporating a microwave heatable material, said layer having a main region towards the centre of the layer and a peripheral region, said main region having a greater proportion of microwave heatable material than said peripheral region so that in use a greater amount of microwave radiation is absorbed by the main region than by the peripheral region.
An embodiment of the invention will now be described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a cross-sectional view of a microwave dish according to the invention; and Figure 2 is a detailed cross-sectional view of the region I of Figure 1 of the drawings.
Referring now to the drawings wherein similar numerals have been used to indicate like parts, there is shown a microwave dish generally indicated at 10 according to the invention. The microwave dish 10 comprises a circular pan 11, of diameter D equal to approximately 275mm, having an upturned lip 12. The pan 11 is fabricated from metal ranging in thickness D1 from around 0.25mm to 3.Omm, Figure 2.
A microwaveable layer 13 comprising a mixture substantially of high temperature vulcanising silicone rubber, a material with a high thermal resistance, and, for example, ferrite, which heats when stimulated by microwave radiation used in conventional microwave ovens, is applied to the underside of the pan 11.
The layer 13 varies in depth from the periphery towards the centre of the pan. The layer 13 includes an annular main region 15, extending radially from the centre of the pan from 12.5mm, D1, to 145mm, D2. In the present embodiment the main region 15 has a depth D3 of not more than approximately 3mm. An annular peripheral region 14, extends approximately 45mm from the main region 15 to the periphery of the pan. The region 14 has a depth D4 approximately 40% of the depth D3. The layer 13 also includes a central region 16 extending across a diameter of 25mm, D5, in the centre of the pan and its thickness is reduced by a depth D6, approximately 30 of the depth D3.
In use, the dish may be placed in a microwave oven and pre-heated. The main region 15, being of greater thickness than the peripheral region 14, absorbs a proportionally greater amount of microwave radiation and heats to a temperature of approximately 2400C in comparison to a temperature of approximately 1900C in the region 14.
The reduced thickness of the central region 16 means that it receives proportionally less radiation than the region 15. Thus, if the centre of the oven has a "hot spot", the region 16 will not overheat.
Once the dish is pre-heated, a pizza or other food product, not shown, can be placed on the dish, and the oven can be set to cook the pizza over a required period. The main portion of the pizza lying in register with the region 15 attracts proportionally less radiation than the peripheral region of the pizza.
However, the main portion of the pizza receives a proportionally greater amount of heat through conduction, through the pan 11, from the higher heat store contained in the main region 15. Thus, even cooking of the pizza is provided by the dish.
It will be seen that in an alternative embodiment of the invention, the main region 15 could incorporate a higher density of ferrite than the peripheral region 14.
In this case the layer thickness could remain constant, yet the main region 15 would still in use absorb a greater amount of heat than the peripheral region.
The invention is not limited to the embodiments described herein which may be modified or varied without departing from the scope of the invention.

Claims (10)

Claims:
1. A microwave dish comprising a base having a layer incorporating a microwave heatable material, said layer having a main region towards the centre of the layer and a peripheral region, said main region having a greater proportion of microwave heatable material than said peripheral region so that in use a greater amount of microwave radiation is absorbed by the main region than by the peripheral region.
2. A microwave dish according to claim 1 in which the main region is thicker than the peripheral region.
3. A microwave dish according to claim 2 in which the dish is round and the main region is annular and includes a central region located at the centre of the main region, said central region being thinner than said main region.
4. A microwave dish according to claim 1 in which said layer comprises a mixture substantially of ferrite and high temperature vulcanising silicone rubber.
5. A microwave dish according to claim 1 in which the main region is substantially the same thickness as the peripheral region, the layer in said peripheral region comprising a mixture substantially of ferrite and high temperature vulcanising silicone rubber in a first ratio and the layer in said main region comprising a mixture substantially of ferrite and high temperature vulcanising silicone rubber in a second ratio, said second ratio being greater than said first ratio.
6. A microwave dish according to claim 1 in which said base conforms to the shape of a pizza.
7. A microwave dish substantially as herein described with reference to, or with reference to and as illustrated in, the accompanying drawings.
8. A method of cooking a round food product in a microwave oven, comprising: placing a round microwave dish according to any one of claims 1 to 7 in a microwave oven; pre-heating the dish; placing the round food product on the dish; and cooking the food product.
9. A method according to claim 8, wherein the food product is a pizza.
10. A method of cooking a round food product in a microwave oven, substantially as herein described with reference to the accompanying drawings.
GB9623118A 1995-11-13 1996-11-06 Microwave dish Withdrawn GB2307160A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IES950872 IES75367B2 (en) 1995-11-13 1995-11-13 Microwave dish

Publications (2)

Publication Number Publication Date
GB9623118D0 GB9623118D0 (en) 1997-01-08
GB2307160A true GB2307160A (en) 1997-05-14

Family

ID=11040964

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9623118A Withdrawn GB2307160A (en) 1995-11-13 1996-11-06 Microwave dish

Country Status (3)

Country Link
AU (1) AU7065996A (en)
GB (1) GB2307160A (en)
IE (1) IES75367B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8203107B2 (en) 2004-05-27 2012-06-19 Mastrad, S.A. Microwavable cooking implements and methods for crisping food items using the same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988005249A1 (en) * 1986-12-24 1988-07-14 Mardon Son & Hall Limited Microwave heating
EP0317203A1 (en) * 1987-11-18 1989-05-24 Alcan International Limited Improvements in microwave heating
US4915780A (en) * 1987-01-26 1990-04-10 Beckett Industries Inc. Process for making an element for microwave heating
US5059279A (en) * 1989-06-21 1991-10-22 Golden Valley Microwave Foods Inc. Susceptor for microwave heating
US5239153A (en) * 1988-11-28 1993-08-24 Beckett Industries Inc. Differential thermal heating in microwave oven packages

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988005249A1 (en) * 1986-12-24 1988-07-14 Mardon Son & Hall Limited Microwave heating
US4915780A (en) * 1987-01-26 1990-04-10 Beckett Industries Inc. Process for making an element for microwave heating
EP0317203A1 (en) * 1987-11-18 1989-05-24 Alcan International Limited Improvements in microwave heating
US5239153A (en) * 1988-11-28 1993-08-24 Beckett Industries Inc. Differential thermal heating in microwave oven packages
US5059279A (en) * 1989-06-21 1991-10-22 Golden Valley Microwave Foods Inc. Susceptor for microwave heating
US5059279B1 (en) * 1989-06-21 1995-01-03 Golden Valley Microwave Foods Susceptor for microwave heating

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8203107B2 (en) 2004-05-27 2012-06-19 Mastrad, S.A. Microwavable cooking implements and methods for crisping food items using the same

Also Published As

Publication number Publication date
IES75367B2 (en) 1997-08-27
GB9623118D0 (en) 1997-01-08
AU7065996A (en) 1997-05-22

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)