Vented single stage barrier screw with a gas vent hole and axial

Details Vented single stage barrier screw with a gas vent hole and axial Vented single stage barrier screw with a gas vent hole and axial

1998-09-16

2000-12-26

Cooley, Charles E.

Agitating

Rubber or heavy plastic working

With specified vent means

366 88, B29B 784

Patent

active

061648108

ABSTRACT:
A barrel contains an extruder conveying screw which has a drive end, a feed section, a melting section and a pumping section wherein the screw has a vent hole located from 0 to 2 screw diameters from the beginning of the feed section. An axial bore in the screw vents gases from the barrel through the gas vent hole and into the axial bore.

REFERENCES:
patent: 2774105 (1956-12-01), Bernhardt
patent: 2992679 (1961-07-01), Twaddle
patent: 3524222 (1970-08-01), Gregory et al.
patent: 3593843 (1971-07-01), Hill
patent: 3902704 (1975-09-01), Ishibashi et al.
patent: 3986709 (1976-10-01), Vermeulen
patent: 3992500 (1976-11-01), Kruder et al.
patent: 4128341 (1978-12-01), Hsu
patent: 4478519 (1984-10-01), Guibert
patent: 4637790 (1987-01-01), Klein
patent: 4802140 (1989-01-01), Dowling

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