Patents
United States Patent 4134714
Douris , ê et al. January 16, 1979
Multi-stage continuous plastic extrusion apparatus, and extrusion screw
Driskill January 16, 1979
Abstract
A multi-stage extruder apparatus comprising at least two extruder units operatively joined together in series for the progressive sequential working of plastic molding material moving continuously therethrough. The apparatus comprises an improved extrusion screw for a succeeding extruder unit of the multi-stage apparatus which prevents adverse effects attributable to an imbalance of the rate or volume of molding material moving continuously through the multi-stage apparatus.
Feed Screws
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