Refiner for fibrous material

Details Refiner for fibrous material Refiner for fibrous material

D - Textiles, Paper

21

D

D21D 1/30 (2006.01)

Patent

CA 2311040

A pair of refiner members comprises respective refiner bars which cooperate to refine pulp. At least one the refiner bars extends in a spiral pattern for imparting a screw-like pumping action to the pulp. The refiner bars of the cooperating refiner members have different pitch to produce a differential pumping action and increase crossovers between the refiner members in order to improve refining. A sinuous curvature can also be introduced in the spiral pattern to further increase crossovers between the refiner members.

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