Apparatus for the cold deep drawing of films

Details Apparatus for the cold deep drawing of films Apparatus for the cold deep drawing of films

1990-09-14

1993-07-27

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Surface deformation means only

425398, 425403, 425418, 425454, 425457, 425DIG22, B29C 5100

Patent

active

052309100

ABSTRACT:
An apparatus for forming depressions in thermoplastic film. The apparatus uses rotating dies to first frictionally heat and soften the film, and to then urge the film into bores in a mold, thereby forming the depressions. The plastic films thus produced are useful in the production of packaging.

REFERENCES:
patent: 2568956 (1951-09-01), Fienberg et al.
patent: 3307502 (1967-03-01), Armour
patent: 3345684 (1967-10-01), Scherrer-Wirz
patent: 4133625 (1979-01-01), Kellermann et al.
patent: 4534927 (1985-08-01), Morioka et al.

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