Package with microwave induced insulation chambers

Details Package with microwave induced insulation chambers Package with microwave induced insulation chambers

1992-02-05

1994-05-31

Reynolds, Bruce A.

Electric heating

Microwave heating

Cookware

219730, 99DIG14, 426107, 426111, 426234, 426243, H05B 680, B65B 2522

Patent

active

053171187

ABSTRACT:
The present invention provides an insulating microwave heating package with a multiplicity of latent, uninflated or potential insulation chambers capable of inflating when exposed to microwave energy. The package includes at least two superimposed inner and outer pieces of flexible sheet material bonded together at selected points, patches or along seal lines separated by unsealed areas which define side-by-side unfilled, i.e., potential, inflation chambers between the lines, patches or points. Upon exposure to microwave energy, the package and its contents become heated. As a result of this heating process, the unfilled chambers also become heated, causing them to become filled with hot expanding air or moisture vapor. These chambers serve as insulation for the package and enhance heating of the food by reducing heat loss from the package.

REFERENCES:
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patent: 3549381 (1970-12-01), Kinsinger
patent: 4132811 (1979-01-01), Standing et al.
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Litigation:Golden Valley Microwave Foods, Inc., v. Weaver Popcorn Inc. and American Packaging Corp., Civil Action No. F88-00251, (Aug. 22, 1988;N.D. Ind; J. Lee).
Product:BonnieLee.TM. Bag includes sheet susceptor between two plies but not bonded to outer paper ply.

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