Method and material for prepackaging food to achieve microwave b

Details Method and material for prepackaging food to achieve microwave b Method and material for prepackaging food to achieve microwave b

1978-10-12

1980-10-28

Grimley, Arthur T.

Electric heating

Metal heating

Of cylinders

219 1055F, 229 35MF, 426107, 426234, H05B 680, B65D 8134

Patent

active

042309247

ABSTRACT:
The food package includes a flexible wrapping sheet of dielectric material, such as polyester or paperboard, capable of conforming to at least a portion of the article of food's shape. The dielectric wrapping sheet has a flexible metallic coating thereon, such as aluminum, in the form of a relatively thin film or relatively thick foil, the coating being subdivided into a number of individual metallic islands or pads separated by criss-crossing non-metallic gaps provided by exposed dielectric strips on the wrapping sheet. When the food package is placed in a microwave oven, some of the microwave energy passes through the wrapping sheet so as to dielectrically heat the food item, but a lesser amount of the microwave energy is converted into thermal energy by the metallic coating so as to brown or crispen that portion of the food adjacent thereto. Various degrees of microwave transparency can be incorporated into the metallic coating so that a desired or preferred amount of browning is realized by the time that the particular item of packaged food is fully heated or cooked.

REFERENCES:
patent: 3490580 (1970-01-01), Brumfield et al.
patent: 3783220 (1974-01-01), Tanizaki
patent: 3922452 (1975-11-01), Forker, Jr.
patent: 3946188 (1976-03-01), Derby
patent: 4003368 (1977-01-01), Maxel
patent: 4144438 (1979-03-01), Gelman et al.

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