Start-up and operating procedure for roll press having an extend

Details Start-up and operating procedure for roll press having an extend Start-up and operating procedure for roll press having an extend

1985-03-28

1987-11-17

Bashore, S. Leon

Paper making and fiber liberation

Processes and products

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

100 48, 100121, 100211, 162358, 162262, 162199, D21F 308

Patent

active

047072229

ABSTRACT:
In an extended nip proess including a stationary support member, a hydraulically actuatable press shoe supported on and extending along the support member and a rotatable counter-roll opposed to and extending along the direction of the press shoe, there is a flexible, tubular press jacket which rotates around the support member and which is sealed so as to be inflatable by air. Before rotation of the counter-roll starts, the press jacket is air inflated and expands to partially wrap around the counte-roll. After rotation of the counter-roll and the press jacket begins, and only after a set minimum velocity has been exceeded, then the press shoe is fluid pressurized against the press jacket. At the time, the air pressure in the press jacket is reduced. Various control devices control the feed of pressure liquid to the press shoe and the feed of air to the press jacket until and then after a minimum speed level is exceeded.

REFERENCES:
patent: 3269893 (1966-08-01), Rojecki
patent: 3804707 (1974-04-01), Mohr et al.
patent: 4555305 (1985-11-01), Steiner et al.
patent: 4563245 (1986-01-01), Caapotti
patent: 4576682 (1986-03-01), Wanke et al.

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