Thermoforming machine with automatically mechanically operated w

Details Thermoforming machine with automatically mechanically operated w Thermoforming machine with automatically mechanically operated w

1980-03-20

1981-03-10

Flint, Jr., J. Howard

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Starting material is nonhollow planar finite length preform...

4253871, 425388, 425394, 425398, 425436R, 425422, 425214, B29C 1700, B29C 700

Patent

active

042553822

ABSTRACT:
In differential pressure synthetic plastics thermoforming machinery, mold support assemblies mounted on a frame have relative movement between a mold open and a mold closed position. Power operated mechanism is provided for axially moving at least the female mold support assembly, and the female mold on the assembly which carries a stripper element mounted for relative movement with the mold. Mechanism is provided for automatically latching the stripper element to the frame as the female mold moves toward mold closed position, and abutments are provided on the mold support assembly and latch for automatically unlatching it only after the female mold has withdrawn a predetermined distance in its movement toward mold open position.

REFERENCES:
patent: 2717421 (1955-09-01), Beeson
patent: 3132378 (1964-05-01), Johannigman
patent: 3376607 (1968-04-01), Brown
patent: 3635617 (1972-01-01), Hara et al.
patent: 3764051 (1973-10-01), Pinto et al.
patent: 3880561 (1975-04-01), Ferro
patent: 4105386 (1978-08-01), Thiel et al.
patent: 4105736 (1978-08-01), Padovani
patent: 4158539 (1979-06-01), Arenda et al.

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