Refiner plates with high-strength high-performance bars

Details Refiner plates with high-strength high-performance bars Refiner plates with high-strength high-performance bars

2011-03-01

2011-03-01

Francis, Faye (Department: 3725)

Solid material comminution or disintegration

Apparatus

Cooperating comminuting surfaces

C241S296000

Reexamination Certificate

active

07896276

ABSTRACT:
A refiner plate for mechanical refiner of lingocelluosic material, the refiner plate including: a refining surface including bars and grooves, wherein the bars each have an upper section including a leading edge and a lower section including a root at a substrate of the plate; the upper section of the bars has a narrow width and a draft angle less than five degrees, and the lower section of the bars has a wide width greater than the narrow width of upper section and a draft angle of at least five degrees on at least one sidewall of the bar.

REFERENCES:
patent: 4712745 (1987-12-01), Leith
patent: 5181664 (1993-01-01), Kohler
patent: 5467931 (1995-11-01), Dodd
patent: 5476228 (1995-12-01), Underberg
patent: 5893525 (1999-04-01), Gingras
patent: 6032888 (2000-03-01), Deuchars
patent: 6607153 (2003-08-01), Gingras
patent: 6957785 (2005-10-01), Virving
patent: 95/22653 (1995-08-01), None
patent: 95/24528 (1995-09-01), None

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