B - Operations – Transporting – 07 – B
Patent
B - Operations, Transporting
07
B
B07B 1/42 (2006.01) B07B 1/15 (2006.01) B07B 1/46 (2006.01) B07B 9/00 (2006.01) B07B 13/16 (2006.01) B07B 13/18 (2006.01) D21B 1/02 (2006.01)
Patent
CA 2102562
The system includes a variable speed motor (13) which controls the operation of a disk screen (14) which is part of a gyratory screen/disk screening system for wood chips and the like. Wood chips are fed at a variable rate to a storage bin (34), which includes a level sensor (36). The level sensor (36) controls the operation of a star feeder (42) to maintain the level of input in the bin (34) between two set points, thereby providing a varying amount of input material to the upstream end of gyratory screen (12). The speed of the motor (46) driving the star feeder valve (42) is used to develop a control signal for the disk screen motor (13), to ensure a uniform flow rate off the disk screen.
Oyen Wiggs Green & Mutala Llp
Weyerhaeuser Company
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