Annular gap extruder
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Nov 22, 1994
Grant Date -
N/A
app pub date -
May 7, 1993
filing date -
May 7, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus in the context of a rotating conveying screw situated within a cylindrical housing which has an inlet port on one end of the cylinder and a discharge opening on the other end of the cylinder. A resistance plate is mounted transversely to the conveying screw near the discharge opening for corotation with the screw. The plate is mounted to define a discharge gap between the opening and the plate. A sleeve on the housing is employed to adjust the size of the gap between the plate and the opening. The resistance plate can be a flat disc, conical, or other shape, so long as it is effectively attached to and rotates with the screw. The helical screw is preferably supported at both ends by a bearing means. Breaker bars are mounted on the transverse plate and extend over the gap between the discharge opening and the plate. Breaker bars may also be mounted to the cylindrical sleeve and extend over the gap between the sleeve and the plate. In another aspect of the invention, a flow of steam or a hot fluid enters and/or leaves the interior of the screw, through the end of the screw near the discharge opening.
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