Rotary thermoforming process and apparatus

Details Rotary thermoforming process and apparatus Rotary thermoforming process and apparatus

1978-12-29

1981-01-13

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Starting material is nonhollow planar finite length preform...

425292, 425296, 4253261, 4253421, 4253871, 425388, B29C 1704, B29C 1710

Patent

active

042449154

ABSTRACT:
The invention is a process and apparatus for continuously thermoforming plastic containers wherein opposed co-rotating discs process a molten sheet of thermoplastic material having a wedge-shaped cross-section, said discs transporting said thermoplastic material through a plug-assisted pressure and/or vacuum forming station, a shear station and a part removal station.

REFERENCES:
patent: 3234594 (1966-02-01), Winstead
patent: 3235639 (1966-02-01), Knowles
patent: 3816585 (1974-06-01), Edwards

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