Plastic melt extruder having an adjustable throttling gap of non-uniform width
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 9, 1994
Grant Date -
N/A
app pub date -
Jun 25, 1993
filing date -
Jul 14, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An extruder for processing plastic material has a housing with a longitudinal bore in which an extruder screw is coaxially fitted for rotation around an axis of the screw to advance plastic material through the bore by threads on the screw. A plurality of throttling plungers are slidably supported in rectangular slots in the housing perpendicular to the axis of the screw. The throttling plungers define an inner throttling surface facing an outer thread-free region of the screw to form an annular throttle gap therewith. In order to avoid uncontrolled changes in the throttling system, the throttling surfaces are not concentric with the outer surface of the screw, so that the throttle gap has a width which varies progressively and symmetrically around the screw.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully