Roll press for removing water from a web of paper using solid gr

Details Roll press for removing water from a web of paper using solid gr Roll press for removing water from a web of paper using solid gr

1988-12-30

1989-12-19

Hastings, Karen

Paper making and fiber liberation

Apparatus

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

162206, 162207, 100176, D21F 302

Patent

active

048880965

ABSTRACT:
A paper machine includes a press section in which the paper web is carried along between a pair of paper machine felts. A dewatering apparatus is included in the press section which consists of a pair of opposed press rollers, one on either side of the felts, with the rollers forming a nip. The rolls are pressed toward each other to compress the felts and the paper web to the maximum mechanical compression. Compressed air is passed through one roller at the nip to the other roller which includes an exhaust device for draining the water blown through by the compressed air. The air is passed under pressure at the nip to evacuate water from the pores of the compressed felts and web. When the paper advances from the nip into an environment at atmospheric pressure, the paper web is substantially free of water.

REFERENCES:
patent: 2696148 (1954-12-01), Hornbostel
patent: 3257268 (1966-06-01), Wrist et al.
patent: 3284285 (1966-11-01), Holden
patent: 3655507 (1972-04-01), Nykopp
patent: 3657069 (1972-04-01), Candor et al.

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