Pressure roller including air relief mechanism
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United States of America Patent
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Jan 8, 1991
Grant Date -
N/A
app pub date -
Sep 6, 1988
filing date -
Sep 6, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pressure roller for cooperative drive relation with an inner annular surface of an annular rotative extrusion die of a pellet mill is provided. The pressure roller includes a substantially circular ring having a substantially circular cross-section, a circumferential outer surface and a longitudinal axis. The circular ring includes air relief mechanism, including an air relief channel, in the outer surface for channeling air escaping from particulate feed material compressed between the roller and the inner surface of the extrusion die. The channel extends at an angle with respect to a line parallel to the longitudinal axis.
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