Twin wire web forming with wire tension control

Details Twin wire web forming with wire tension control Twin wire web forming with wire tension control

1977-12-23

1979-07-10

Fisher, Richard V.

Paper making and fiber liberation

Apparatus

Automatic control

162301, D21F 140, D21F 702

Patent

active

041606949

ABSTRACT:
A twin wire web forming machine suitable for making newsprint or slower draining grades of product is provided with a substantially continuously curving S-shaped formation and dewatering path, wherein one of the wires diverges from the web subsequent to passage through a formation zone lying about an arc of a first roll, a suction compartment within a couch roll at the point of wire divergence assuring continued adherence of the web to the remaining wire as it passes around the couch roll. A brake is controlled on the first roll to provide a predetermined value of wire tension.

REFERENCES:
patent: 3056719 (1962-10-01), Webster
patent: 3565757 (1971-02-01), Jordansson
patent: 3996098 (1976-12-01), Kankaanpaa

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