Patents
United States Patent 6164810
Douris , ê et al. December 26, 2000
Vented single stage barrier screw with a gas vent hole and axial bore in the scew for venting gases
Derezinski December 26, 2000
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.
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