Apparatus for thickening pulp and paper stock

Details Apparatus for thickening pulp and paper stock Apparatus for thickening pulp and paper stock

1988-08-08

1991-06-04

Simmons, David A.

Liquid purification or separation

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Movable medium

210401, 210402, 210407, 162 55, B01D 3300

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050211595

ABSTRACT:
In apparatus for thickening a suspension of pulp material which includes an endless foraminous belt wrapping two spaced horizontally supported rolls, a special doctor mechanism is provided for transferring thickened pulp from the bare surface of the second roll into a trough mounted in the space bounded by the two rolls and the upper and lower runs of the belt. More specifically, the doctor mechanism includes a rigid doctor blade mounted with its working edge in close but spaced relation with the bare surface of the roll to remove pulp therefrom without contact with the roll surface. Provision is also made for periodically oscillating the blade about a horizontal axis to move its working edge away from and back to its closely spaced working relation with the roll.

REFERENCES:
patent: 1241905 (1917-10-01), Behr
patent: 2271385 (1940-01-01), Best
patent: 2913365 (1959-11-01), Osborne et al.
patent: 2936073 (1960-05-01), Thompson
patent: 2997176 (1961-08-01), Delmas
patent: 4146484 (1979-03-01), Campbell
patent: 4185399 (1980-01-01), Gladish
patent: 4501662 (1985-02-01), Biondetti
patent: 4722793 (1988-02-01), Seifert et al.

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