Pulp press vat providing enhanced bottom access

Details Pulp press vat providing enhanced bottom access Pulp press vat providing enhanced bottom access

1990-07-27

1991-11-12

Coe, Philip R.

Presses

With drain means for expressed liquid

Drainage through or along pressure surface

100156, 220211, 366 77, B30B 920

Patent

active

050638408

ABSTRACT:
A press for dewatering papermaking pulp has a pair of adjacent perforated cylindrical rolls which define a continuously converging nip and a vat shell adjacent the rolls which provides enhanced bottom access to the press rolls by means of a door which is hinged to swing downward and away from the bottom of the press vat. A hoist mechanism raises and lowers the unhinged side of the door as required, and retractable keys latch the door in a sealing position against the vat. A shock absorber mechanism is provided to limit the speed at which the unhinged side of the door can fall when being lowered.

REFERENCES:
patent: 1234526 (1917-07-01), Banbury
patent: 1238624 (1917-08-01), Becker
patent: 2350603 (1944-06-01), Fry
patent: 2915005 (1959-12-01), Hetzler
patent: 2994100 (1961-08-01), Comes et al.
patent: 3369324 (1968-02-01), Tremblay et al.
patent: 3695587 (1972-10-01), De Marco
patent: 4543161 (1985-09-01), Fujimoto
patent: 4729490 (1988-03-01), Ziegenbein

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