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Cooking instrument using a microwave oven for heating a primary cooking surface
| Details |
Inventors: Yamada, Katsuya; Yamanouchi, Shosuke; Toyooka, Shinichi;
Assignee: Sumitomo Electric Industries, Ltd. (Osaka, JP)
Primary Examiner: Leung; Philip H.
Assistant Examiner:
Attorney, Agent or Firm: Armstrong, Nikaido, Marmelstein, Kubovcik & Murray
The present invention is directed to a cooking container for use in heating food in a microwave oven. Specifically, the present invention concerns a cooking utensil capable of heating itself up by microwaves to heat food to such an extent as to be browned but not to be scorched and be stuck to the cooking surface. A fluororesin layer 1 is formed on the top surface of a metal plate 2, and a heat buildup layer 3 adapted to be dielectrically heated by microwaves is formed on the bottom thereof. A covering 4 permeable to microwaves is provided on the outside of the heat buildup layer. The covering is partially formed into legs to support the bottom surface of the plate. A lid capable of reflecting microwaves may be put on the metal plate to shield the food to be cooked against microwaves. |
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DETAILED DESCRIPTION What is claimed is: 1.
A cooking instrument for use in a microwave oven, comprising: a metal plate; a heat buildup layer provided on the bottom of said metal plate and adapted to be dielectrically heated by microwaves; and a covering means permeable to microwaves formed on the outside of said heat buildup layer, part of said covering means being formed into legs, for allowing microwaves to substantially heat said heat buildup layer, wherein said heat buildup layer is substantially made of ferroelectric substances containing Fe.
sub.
3 O.
sub.
4 as a main component and a silicone rubber containing phenyl groups, the average thickness of said heat buildup layer being determined so as to be within the range of 1.
4 mm to 2.
33 mm for 60 percent by weight and from 1.
05 mm to 1.
75 mm for 80 percent by weight, respectively, including generally corresponding thicknesses for content percentages therebetween, and the bottom of said heat buildup layer being from 13 mm to 23 mm high and the height of said legs being from 10 mm to 22.
5 mm.
2.
A cooking instrument for use in a microwave oven as claimed in claim 1, further: a microwave-reflective lid means adapted to be put on said metal plate to cover the top surface thereof, for shielding food to be cooked against microwaves; and a layer for preventing dielectric breakdown having a thickness of 3 mm or less and disposed at a contact interface between said lid and said fluororesin layer provided on the top of said metal plate.
3.
A cooking instrument for use in a microwave oven as claimed in claim 1 or 2, wherein said legs are separable from said metal plate.
4.
A cooking instrument for use in a microwave oven as claimed in claim 2, wherein the volume of the cooking space defined by the volume of the space defined between said lid and the cooking surface relative to the volume of food to be cooked is 8.
4 cm.
sup.
3 /cm.
sup.
2 or less with respect to the projected area of the food.
5.
A cooking instrument for use in a microwave oven as claimed in claim 1, wherein said heat buildup layer is thinner at predetermined portions where heat dissipates so that the temperature inside said heat buildup layer will be uniform over an entire area thereof while being heated by microwaves
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