D - Textiles – Paper – 21 – D
Patent
D - Textiles, Paper
21
D
209/105
D21D 5/02 (2006.01) B01D 35/26 (2006.01)
Patent
CA 1154403
ABSTRACT OF THE DISCLOSURE A paper machine screening apparatus generally includes a centrifugal pump member mounted for rotation about the axis of a tubular screen plate. A delivery passageway extends concentrically about the pump impeller for receiving pumped stock flow and includes an annular axially extending passage formed between a ribbed hub surface of the pump and the screen. Flow through the screen is passed from the screening apparatus to headboxes. Downstream of the annular passage is an end cavity for receiving particles unable to pass through the screen holes which are wahsed into the end cavity by the axial flow through the annular passage. The ribbings on the hub surface serve to agitate the stock flow to raise pressure forces tending to force flow out through the screen holes.
379468
Beloit Corporation
Ridout & Maybee Llp
LandOfFree
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