B - Operations – Transporting – 07 – B
Patent
B - Operations, Transporting
07
B
209/97
B07B 7/00 (2006.01) B01D 33/04 (2006.01) D21C 5/02 (2006.01) D21D 5/02 (2006.01)
Patent
CA 2024233
An apparatus is disclosed for removing ash from repulped wastepaper which contains ash together with cellulosic fibers. The apparatus includes a frame and a plurality of rolls which are rotatably secured to the frame, such that the axes of rotation of the rolls are spaced and parallel to each other. The plurality of rolls include an upstream roll and a downstream roll having a cylindrical outer surface. A porous belt is supported by and extends around the plurality of rolls to define an endless loop. The belt moves between the upstream and downstream rolls for defining a screening portion. A headbox is disposed within the endless loop, and adjacent to the screening portion for ejecting the repulped wastepaper through the screening portion. A drainage device is disposed on the opposite side of the screening portion relative to the headbox for receiving ash passing through the screening portion. A shower is disposed adjacent to the cylindrical outer surface of the downstream roll for dislodging cellulosic fibers separated from the ash between the headbox and the downstream roll such that the fibers follow the cylindrical outer surface when the belt diverges relative to the outer surface. A doctor is disposed adjacent to the outer surface for doctoring the fibers from the outer surface of the downstream roll. A transverse conveyor is disposed adjacent to the outer surface for conveying the fibers transversely relative to the belt so that the fibers separated from the ash can be subsequently used for forming a reprocessed web.
Beloit Corporation
Ridout & Maybee Llp
LandOfFree
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