Paper making and fiber liberation – Processes and products – Running or indefinite length work forming and/or treating...
Patent
1984-03-23
1985-11-26
Smith, William F.
Paper making and fiber liberation
Processes and products
Running or indefinite length work forming and/or treating...
162272, 162358, 162361, 100 38, 100 93RP, 100118, 100153, D21F 302
Patent
active
045553050
ABSTRACT:
In a belt pressing unit, which preferably serves as wet press of a paper machine, an elastic tubular press belt travels around a supporting body and, together with a back roll, forms an extended press zone. Beyond the press zone along the path of the press belt, liquid is fed to the inner side of the press belt in order to cool the press belt. This liquid is permitted to travel, together with the press belt, around the supporting body. Most of the liquid is then removed from the press belt, preferably at a position in front of the press zone. The liquid may then be cooled and fed back to the press belt. In addition, liquid may also be fed to the inner side of the press belt where the press belt enters the press zone, for cooling and lubricating a pressing surface of a press shoe which presses the press belt toward the back roll. Furthermore, control circuits may be provided, one for sensing the temperature of the liquid removed from the press belt and controlling the cooling of the press belt, and another for sensing the pressing surface temperature and controlling its cooling.
REFERENCES:
patent: 3116134 (1963-12-01), May
patent: 3269893 (1966-08-01), Rojecki
patent: 3586602 (1967-10-01), Schmidt
patent: 3726338 (1973-04-01), Sorenson
patent: 4272317 (1981-06-01), Roerig
patent: 4287021 (1981-09-01), Justus et al.
patent: 4308096 (1981-12-01), Cronin
Meinecke Albrecht
Mullner Josef
Schiel Christian
Steiner Karl
Weiss Hans
Hastings K. M.
J. M. Voith GmbH
Smith William F.
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