Process for manufacturing a food container by extrusion and vacu

Details Process for manufacturing a food container by extrusion and vacu Process for manufacturing a food container by extrusion and vacu

1981-10-19

1985-07-16

Massie, Jerome

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

15624411, 15624427, 1562726, 156285, B29C 1704, B32B 102, B32B 104

Patent

active

045294640

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.

REFERENCES:
patent: 3657044 (1972-04-01), Singer
patent: 3697369 (1972-10-01), Amberg et al.
patent: 3823061 (1974-07-01), Frayer et al.
patent: 3924013 (1975-12-01), Kane
patent: 4337116 (1982-06-01), Foster et al.

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