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US 4,141,487 AGranted
Disposable food package
AssigneeUnion Carbide Corporation
InventorsClifford C. Faust, Mark F. Mettler
Life of this patent
Estimating the term…
Abstract
The disposable package comprises an upper layer composed of a thin film plastic material having a sealed pleated section extending from opposite parallel sides intermediate the ends thereof and an elongated vent disposed within the pleated section. The sealed pleated section is adapted to open exposing the vent at a predetermined temperature below the cooking temperature of the product.
Claims12
A disposable package for enclosing a food product adapted to be cooked within the package at an elevated temperature without being immersed in a surrounding liquid medium comprising:
- a continuous unitary layer of plastic film forming the upper wall surface of said package adapted to overlie said food product, said layer being folded over to form at least one pleated section having a cross-sectional geometry resembling the letter "Z" or mirror image thereof and having an interior fold line extending between two opposite substantially parallel sides intermediate the ends thereof;
- at least one elongated opening passing through said layer and disposed along the interior fold line of said pleated section for venting gas during cooking, and an adhesive sealant material having a predetermined melting temperature below said cooking temperature, said adhesive sealant material being disposed within said pleated section for sealing said elongated opening until said predetermined temperature is reached.
Dependencies are inferred from the claim text.