Process for manufacturing a food container by extrusion and vacuum forming
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United States of America Patent
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Jul 16, 1985
Issued Date -
N/A
app pub date -
Oct 19, 1981
filing date -
Jul 21, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Disclosed is a container especially adapted for use in storing and heating comestibles intended for final preparation in microwave ovens. The container comprises a molded pulp tray, having a plastic film, preferably a polyester, adhered to its product-contacting surfaces. The container exhibits high strength and excellent product protection, but yet is low in cost. The process for making the container takes advantage of the porous nature of the pulp tray by drawing a vacuum directly through the tray to draw a film of heated plastic into adhering contact. The film is preferably extruded as the tray, carried in a vacuum mold, passes directly under the extruder.
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