Presses – With drain means for expressed liquid – Drainage through or along pressure surface
Patent
1975-04-14
1977-01-18
Feldman, Peter
Presses
With drain means for expressed liquid
Drainage through or along pressure surface
100147, 100148, B30B 912
Patent
active
040033040
ABSTRACT:
The invention relates to a screw press for dewatering suspended fibrous pulp. The press comprises a tubular casing with perforated wall and a screw member rotatable within the casing. The desired degree of dewatering is controlled by a throttling member adjustable so as to generate a predetermined counter-pressure against the pulp advanced by the screw member. It rather often occurs that the pressure produced in the press becomes so high that the rotation of the screw member is stopped which means total stop of the operation of the press. The invention provides means adapted automatically to avoid such undesired stop in operation by relieving the press from internal pressure exceeding a predetermined, adjustable value.
REFERENCES:
patent: 647354 (1900-04-01), Anderson
patent: 975990 (1910-11-01), Overton et al.
patent: 1004283 (1911-09-01), Le Docte
patent: 2903960 (1959-09-01), Zies
patent: 3062129 (1962-11-01), Wandel
patent: 3683796 (1972-08-01), Miner et al.
patent: 3760717 (1973-09-01), DeMilt et al.
Feldman Peter
Munson Eric Y.
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