Extruder
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United States of America Patent
Stats
-
Apr 2, 1985
Grant Date -
N/A
app pub date -
May 25, 1983
filing date -
Jun 7, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In an extruder, for extruding thermoplastic synthetic material or rubber or for use for pressing water out of a material, a screw rotates in a cylindrical chamber and helical conveying lands provided on the screw are interrupted at positions at which pins project into the chamber thereby forming grooves to receive the pins. To sense breakage of a pin, for example caused by metal particles in the extrudate, signal-generating means are provided in a blind bore in each pin, receipt of a signal from the signal generating means causing the screw to be stopped from rotating thereby to prevent further damage.
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Cited Art Landscape
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