Apparatus with a long press zone in the press treatment of a web

Details Apparatus with a long press zone in the press treatment of a web Apparatus with a long press zone in the press treatment of a web

1983-10-13

1986-02-04

Bashore, S. Leon

Paper making and fiber liberation

Apparatus

Running or indefinite length product forming and/or treating...

162205, 100156, 100210, D21F 300

Patent

active

045684235

ABSTRACT:
Apparatus for the press treatment of a fiber web in a long or extended press zone includes a first press fabric loop in which a press roll is situated and a press shoe situated within a press belt loop which acts in opposition to the press roll, the latter being supported on a transverse beam. The press roll and press shoe together form an extended press zone through which the web to be pressed is guided. The press shoe includes a pressure chamber isolated from the external environment by sealing members and to which a pressure medium, such as a fluid under pressure, is passed. The pressure chamber acts within the extended press zone on the press belt. According to the invention, the pressure chamber of the press shoe comprises a hydrostatic pressure chamber which, when viewed in the direction of web run, is bounded at its front and rear by hydrodynamic press shoes which function both as sealing elements for the hydrostatic pressure chamber and, additionally, as press-shoe members which produce compression pressures on the press belt and on the web.

REFERENCES:
patent: 3853698 (1974-12-01), Mohr
patent: 3970515 (1976-07-01), Busker
patent: 4201624 (1980-05-01), Mohr et al.
patent: 4427492 (1984-01-01), Cronin

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