Electric heating – Metal heating – Of cylinders
Patent
1990-07-11
1991-08-27
Leung, Philip H.
Electric heating
Metal heating
Of cylinders
219 1055F, 426107, 426111, 426234, 426243, 99DIG14, H05B 680, B65R 2522
Patent
active
050435493
ABSTRACT:
The present invention provides an insulating microwave heating package with at least one and preferably a multiplicity of latent, uninflated or potential isulation chambers capable of inflating when exposed to microwave energy. The package includes at least two sheets of material bonded together at selected points, patches or along seal lines separated by unsealed areas which define unfilled 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:
patent: 4132811 (1979-01-01), Standing et al.
patent: 4190757 (1980-02-01), Turpin
patent: 4196331 (1980-04-01), Leveckis et al.
patent: 4219573 (1980-04-01), Borek
patent: 4316070 (1982-02-01), Prosise et al.
patent: 4553010 (1985-11-01), Bohrer et al.
patent: 4705927 (1987-11-01), Levendusky et al.
patent: 4713510 (1987-12-01), Quick
Brandberg Lawrence C.
Watkins Jeffrey T.
Golden Valley Microwave Foods Inc.
Harmon James V.
Leung Philip H.
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