CENTRIFUGAL SIFTING APPARATUS
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United States of America Patent
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Issued Date -
Dec 19, 2013
app pub date -
Jun 19, 2013
filing date -
Jun 19, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A stationary screen (14) of cylindrical or frusto-conical form is mounted inside the downstream end sifting section (10B) of a machine housing (10) which also has an upstream end feed section (10A). An auger screw (24) is provided in the upstream end section (10A) on a shaft (20) which is rotatable so as to feed material to be sifted into an end of the screen (14). The shaft (20) is mounted in cantilever manner from the upstream end of the housing (10) and drive means are mounted at or near the upstream end of the housing to rotate the shaft (20). A paddle assembly (26) is provided in the downstream end section (10B), inside the screen (14), and is mounted to the same shaft (20) as the auger screw (24). This shaft (20) is a hollow shaft. A second rotatable shaft (30) extends, preferably co-axially, through the first hollow shaft (20) and projects beyond the first hollow shaft into the screen (14). A separate inner sieve (40), also of cylindrical or frusto-conical form, is mounted to the second shaft (30) and serves either as a trash trap, or to provide a second product split by size with coarse particles which have passed through the sieve (40) but not the screen (14) exiting through outlet (18).
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