Multi-shaft extruder screw bushing and extruder
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 12, 2000
Grant Date -
N/A
app pub date -
Feb 5, 1999
filing date -
Feb 5, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A single flighted multi-screw conveying bushing that has only one helical screw element extending the length of the bushing. The bushing has a cross-section shape that has a segmented circular base and a lobe extending from the base. The lobe has a truncated crest that is sized to have a circumferential angle of from 15.degree. to 30.degree. and preferably from 22.degree. to 24.degree.. Also, a twin screw extruder having a pair of side by side drive shafts with at least two of the single flighted screw bushings mounted end to end on each shaft.
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