IES75367B2 - Microwave dish - Google Patents

Microwave dish

Info

Publication number
IES75367B2
IES75367B2 IES950872A IES75367B2 IE S75367 B2 IES75367 B2 IE S75367B2 IE S950872 A IES950872 A IE S950872A IE S75367 B2 IES75367 B2 IE S75367B2
Authority
IE
Ireland
Prior art keywords
region
microwave
layer
main region
peripheral region
Prior art date
Application number
Inventor
James Connolly
Original Assignee
James Connolly
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 James Connolly filed Critical James Connolly
Priority to IES950872 priority Critical patent/IES75367B2/en
Priority to GB9623118A priority patent/GB2307160A/en
Priority to AU70659/96A priority patent/AU7065996A/en
Publication of IES75367B2 publication Critical patent/IES75367B2/en

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

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 Dl from around 0.25mm to 3.0mm, Figure 2.
A microwaveable layer 13 comprising a mixture substantially of high temperature vulcanising silicone rubber, a material with a high thermal resistance, and 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, Dl, 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, attracts a proportionally greater amount of microwave radiation and heats to a temperature of approximately 240°C in comparison to a temperature of approximately 190°C 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, to the 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 (5)

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.
IES950872 1995-11-13 1995-11-13 Microwave dish IES75367B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
IES950872 IES75367B2 (en) 1995-11-13 1995-11-13 Microwave dish
GB9623118A GB2307160A (en) 1995-11-13 1996-11-06 Microwave dish
AU70659/96A AU7065996A (en) 1995-11-13 1996-11-07 A microwave dish

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
IES75367B2 true IES75367B2 (en) 1997-08-27

Family

ID=11040964

Family Applications (1)

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

Country Status (3)

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

Families Citing this family (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

Family Cites Families (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
CA1293918C (en) * 1987-01-26 1992-01-07 Donald E. Beckett Element for microwave heating
CA1313231C (en) * 1987-11-18 1993-01-26 Richard M. Keefer Microwave heating
US5239153A (en) * 1988-11-28 1993-08-24 Beckett Industries Inc. Differential thermal heating in microwave oven packages
US4959120A (en) * 1989-06-21 1990-09-25 Golden Valley Microwave Foods, Inc. Demetallization of metal films

Also Published As

Publication number Publication date
AU7065996A (en) 1997-05-22
GB9623118D0 (en) 1997-01-08
GB2307160A (en) 1997-05-14

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Legal Events

Date Code Title Description
MM4A Patent lapsed