Barrel for a material treating machine
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United States of America Patent
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-
Jun 1, 1993
Grant Date -
N/A
app pub date -
Jul 8, 1991
filing date -
Jul 6, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The barrel (20) comprises at least two intersecting lobes (21a,21b) of cylindrical bores having parallel axes each corresponding to a screw and defining in the region of their intersection at least two longitudinal parallel edges (22). Each lobe comprises at least one shearing zone (23a,23b) adapted to cooperate with a shearing element mounted on the respective screws. The shearing zone (23a,23b) of each lobe is formed by least one groove (24a,24b) extending in the direction of the flow of the material and provided on the inner side of the barrel (20), the groove providing therebetween and each edge (22) a portion of a continuous surface of the cylindrical bore forming the corresponding lobe.
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