Method of making a multilayered packaging tray by deep-drawing

Details Method of making a multilayered packaging tray by deep-drawing Method of making a multilayered packaging tray by deep-drawing

1974-03-19

1976-01-13

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Making hole or aperture in article

264248, 264292, 264322, B29C 1703, B65D 8126

Patent

active

039325750

ABSTRACT:
A packaging tray provided with a bottom, side walls, and an outwardly directed flange surrounding the periphery of the side walls of the tray, consists of outer and inner layers of a moldable and stretchable synthetic plastic material, and intermediate layers of liquid-absorbing material with no or but insignificant stretchability. At the molding of the tray, the side walls thereof are formed by stretching of the plastic material and in a softening operation, an adhesive bond is realized between the outer and inner layers in the stretched tray side walls which thus present an at least partially ruptured intermediate layer.

REFERENCES:
patent: 2736065 (1956-02-01), Wilcox
patent: 3264120 (1966-08-01), Westcott
patent: 3511428 (1970-05-01), Dilot

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