High intensity refiner plate with inner fiberizing zone

Details High intensity refiner plate with inner fiberizing zone High intensity refiner plate with inner fiberizing zone

2007-11-27

2007-11-27

Hug, Eric (Department: 1731)

Paper making and fiber liberation

Apparatus

With beating, refining, and/or disintegrating means

C162S023000, C162S028000, C162S068000, C241S028000, C241S261300, C241S298000

Reexamination Certificate

active

11009482

ABSTRACT:
Plate elements, a plate configuration, and associated system for thermomechanical refining of wood chips wherein destructured and partially defibrated chips are fed to a rotating disc primary refiner, where opposed discs each have an inner band pattern of bars and grooves and outer band pattern of bars and grooves, such that substantially complete fiberization (defibration) of the chips is achieved in the inner band and the resulting fibers are fibrillated in the outer band. A pair of opposed co-operating refining plate elements for a flat disc refiner wherein the bars and grooves on each of the inner bands form an inner feed region followed by an outer working region, the bars and groove on each of the outer bands form an inner feed region followed by an outer working region, and the gap and/or material flow area formed when the plates are placed in front of each other increases between the inner working region and the outer feed region. A steam bypass channel is formed as a groove on the surface of the working region of the inner band.

REFERENCES:
patent: 5248099 (1993-09-01), Lahner et al.
patent: 5335865 (1994-08-01), Kohler et al.
patent: 5695136 (1997-12-01), Rohden et al.
patent: 6311907 (2001-11-01), Gingras
patent: 6402071 (2002-06-01), Gingras
patent: 2004/0118959 (2004-06-01), Virving
patent: WO 2004/009900 (2004-01-01), None
Brochure—“Turbine Segments”—Metzo Paper, date unknown.

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