Refiner plates with asymmetric inlet pattern

Details Refiner plates with asymmetric inlet pattern Refiner plates with asymmetric inlet pattern

1993-10-21

1995-01-24

Eley, Timothy V.

Solid material comminution or disintegration

Apparatus

Comminuting elements

241296, 2412612, B02C 712

Patent

active

053836170

ABSTRACT:
An improved pattern of bars and grooves on the plates of a rotating disc refiner, whereby the inherent restriction in the transfer of material into the grooves of the refining zone is reduced relative to conventional designs. The invention can be implemented at one or both of the transition from an innermost, feed zone to an intermediate, refining zone, or the transition from an intermediate, refining zone to an outer, refining zone. The invention can be generally understood as providing an asymmetric or jagged transition line from one zone to another. The asymmetry can be seen in a plate segment, relative to the segment central axis, or it may be seen as a saw tooth shape with respect to laterally adjacent regions of the same zone. Preferably, a line connecting the inlets on laterally successive regions of a particular zone, defines a substantially continuous saw tooth shape or a succession of jagged, "Z" shapes.

REFERENCES:
patent: 1169228 (1916-01-01), Barker
patent: 1187360 (1916-06-01), Martin
patent: 1400123 (1921-12-01), Wolff
patent: 1662572 (1928-03-01), Fryer
patent: 3149792 (1964-09-01), Textor
patent: 3552664 (1971-01-01), Herbert et al.
patent: 4039154 (1977-08-01), Peterson
patent: 4772358 (1988-09-01), Virving
patent: 5112443 (1992-05-01), Virving et al.
patent: 5181664 (1993-01-01), Kohler

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