Golden Valley Microwave Foods, Inc.

Other

David H Cox

David W Andreas

James D Watkins

A microwaveable container is formed of a three part laminate structure including a middle layer of plastic impervious to liquid oils, water vapor, gas, and moisture, an inner layer of fibrous material joined to one side of the middle layer, and an outer fibrous layer joined to the other side of the middle layer. The seams are configured to enable the complete or essential prevention of leakage of oil, moisture, volatile flavoring agents, water vapor and oxygen through the container walls. Oils which are liquid at room temperature may be sealed and stored in the container without refrigeration to a temperature below the melting point of the oils.

Microwaveable container for liquid oils

A food heating package for elongated products such as french fries and fish sticks which includes partitions formed from microwave energy absorbing material adapted to crisp, toast or brown the surfaces of the foods sticks. The partitions preferably enclose the food sticks on at least three sides and can be made by forming folds in a sheet of vapor-deposited semiconductive metallic coating applied to a plastic film, e.g. polyester, backing.

Microwave receptive heating sheets and packages containing them

A coated sheet material is provided for wrapping, packaging or shipping food articles that are to be heated in a microwave oven. The sheet is formed from a paper or paperboard backing which is thermally and dimensionally stable when exposed to microwave energy. On at least one side is provided a smooth calendered surface or the sheet material is treated by processing as with a filler coating to fill the voids between the paper fibers and to thereby present a smooth surface. A microwave interactive layer is applied to the smoothed surface from a fluid or vapor state. The interactive coating can comprise carbon, a semiconductive metal coating or other microwave interactive material.

Coated microwave heating sheet

A coating sheet material is provided for wrapping, packaging or shipping food articles that are to be heated in a microwave oven. The sheet is formed from a paper or paperboard backing which is thermally and dimensionally stable when exposed to microwave energy. On at least one surface is provided a smooth supercalendared surface or the sheet is treated by processing as with a filler coating to fill the voids between the paper fibers and to thereby present a smooth surface. A microwave interactive layer is applied to the smoothed surface from a fluid or vapor state. The interactive coating can comprise carbon, a semiconductive metal coating or other microwave interactive material.

Coated microwave heating sheet for packaging

A food heating package for elongated products such as french fries and fish sticks which includes partitions formed from microwave energy absorbing material adapted to crisp, toast or brown the surfaces of the food sticks. The partitions preferably enclose the food sticks on at least three sides and can be made by forming folds in a sheet of vapor-deposited semiconductive metallic coating applied to a plastic film, e.g. polyester, backing.

The invention provides a flexible packaging sheet including one or more supporting sheets and a base sheet to which is applied a microwave interactive material in the form of a coating or film. The microwave interactive material can comprise any of several elemental metals or oxides such as iron oxide or tin oxide or a thin semiconductive metallic film applied by vacuum electrodeposition. The supporting sheets comprise non-thermoplastic fibrous sheet material such as paper. The base sheet can comprise a plastic resinous material such as polyester.

Flexible packaging sheets and packages formed therefrom

A flexible sheet structure is described which comprises a base sheet having a microwave coupling layer, e.g. electrodeposited aluminum as an island covering a selected area of the sheet. The uncoated portions will not be heated and will not be damaged by microwave energy. The selectively located microwave coupling covered area transfers absorbed heat to a product by thermal conduction. In one form of the invention a flexible fibrous backing sheet such as paper is bonded to the base sheet to provide dimensional stability and prevent warping, shriveling, melting or other damage during microwave heating.

Flexible packaging sheets

A microwave reflective energy concentrating stand is provided which consists of a horizontally disposed article supporting surface and a microwave reflector such as a sheet of metal foil spaced about 1/4 of a wave length of the supplied microwave energy below the supporting surface. The stand can be formed from flexible packaging materials such as paperboard panels. The reflector is isolated electrically from the paperboard.

Microwave heating stand with electrically isolated reflector

A microwave reflective energy concentrating spacer is provided which consists of a horizontally disposed article supporting surface and a microwave reflector such as a sheet of metal foil spaced about 1/4 of a wave length of the supplied microwave energy below the supporting surface. The spacer can be formed from flexible packaging materials such as paperboard panels to which the aluminum foil is bonded to form the reflective surface.

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Robbinsdale, MN, United States of America

David H Cox