초록 ▼

Apparatus for and method of controlling heating of a foodstuff using microwave energy having a food package with a microwave shielding layer containing a plurality of apertures therein sized to permit entry of both evanescent microwave energy and propagating microwave energy into the interior of the

Apparatus for and method of controlling heating of a foodstuff using microwave energy having a food package with a microwave shielding layer containing a plurality of apertures therein sized to permit entry of both evanescent microwave energy and propagating microwave energy into the interior of the package with the microwave shielding layer being moved outward as the package expands due to generation of water vapor such that an interior volume of the package is subsequently protected against substantial evanescent microwave irradiation of the foodstuff during completion of the microwave heating cycle using propagating microwave energy to further heat the foodstuff.

대표청구항 ▼

[ What is claimed is:] [1.]1. Apparatus for controlling heating of a foodstuff with microwave energy comprising:a. a food package having a microwave shielding layer with a plurality of apertures therein, with the apertures sized to permit entry of both evanescent and propagating microwave energy int

[ What is claimed is:] [1.]1. Apparatus for controlling heating of a foodstuff with microwave energy comprising:a. a food package having a microwave shielding layer with a plurality of apertures therein, with the apertures sized to permit entry of both evanescent and propagating microwave energy into the interior of the package;b. a foodstuff contained in the food package with the foodstuff initially located in close proximity to the microwave shielding layer;c. means for moving the microwave shielding layer away from close proximity to at least a portion of the foodstuff after the package and the foodstuff are irradiated with at least a predetermined amount of microwave energy h that the evanescent microwave energy entering the package is insufficient to over heat the foodstuff when the microwave shielding layer is moved out of close proximity to the foodstuff, while the propagating microwave energy continues to heat the foodstuff and the combination of evanescent microwave energy and propagating microwave energy is balanced to achieve a desired heating of the foodstuff.