Refining segment for pulp processing with a deflector arrangement attached at the bars surfaces
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United States of America Patent
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Jun 12, 2012
Grant Date -
Feb 24, 2011
app pub date -
Apr 28, 2009
filing date -
May 6, 2008
priority date (Note) -
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Abstract
A refining segment intended for refiners of disc-type for working fibrous material. A first portion has a first pattern of coarse bars and a second portion has a second pattern of fine bars. The second portion is positioned outside the first portion. The second pattern has a higher density of bars than the first pattern. The refining segment has a deflector arrangement protruding from a bar surface of the coarse bar. The bar surface faces the rotational direction. The deflector arrangement has a deflector surface directing a flow of fibrous material away from the bar surface. A refining apparatus has two opposing rotatable refining discs, separated by a refiner gap. At least one of the two refining discs has the above described patterns and deflector arrangements.
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