Constant vacuum felt dewatering system

Details Constant vacuum felt dewatering system Constant vacuum felt dewatering system

1979-12-06

1982-05-11

Chin, Peter

Paper making and fiber liberation

Processes and products

With measuring, inspecting and/or testing

15302, 15306R, 15306A, 134 18, 134 21, 162199, 162252, 162274, D21F 1100, D21F 148

Patent

active

043292011

ABSTRACT:
A constant vacuum felt dewatering system including first and second suction pipes with a slot in each pipe. A felt is positioned to pass over the slots of the pipes. A liquid ring pump is connected by conduits to the first and second suction pipes. Drive structure is provided to operate the liquid ring pump and apply suction to the first and second suction pipes. The felt is advanced over the pipes whereupon suction is applied thereto to dewater the felt. Controls are responsive to change in felt conditions to vary the dwell time of the felt with respect to the slots in order to maintain a substantially constant vacuum.

REFERENCES:
patent: 2745322 (1956-05-01), Broughton
patent: 2965168 (1960-12-01), Beachler
patent: 3631982 (1972-01-01), Lejeune
patent: 3836428 (1974-09-01), McConaughy
patent: 3859163 (1975-01-01), Haythornthwaite

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