Method and apparatus for dewatering a fibrous web

Paper making and fiber liberation – Processes and products – Conditioning – preparing or repairing of apparatus

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162204, 162205, 162217, 162275, 162358, 162367, 34 9, 34 16, 34 95, 34 92, 4283159, 4283166, D21F 1100

Patent

active

045840580

ABSTRACT:
An apparatus, method and band for forming and/or dewatering a fibrous web, in which the web or a pulp suspension layer forming the same is conveyed and supported through a significant portion of its run in a paper machine by a specific processing band, while liquid such as water is simultaneously removed therefrom by hydraulically contacting the same with liquid present under vacuum or underpressure within the processing band, through a finely porous, liquid-suction surface on the band that is saturated with liquid.

REFERENCES:
patent: 3421230 (1969-01-01), Ward
patent: 3518161 (1970-06-01), Ekberg et al.
patent: 3840429 (1974-10-01), Busker et al.
patent: 3910815 (1975-10-01), Shelor
patent: 3968571 (1976-07-01), Oschatz et al.
patent: 3973329 (1976-08-01), Feess
patent: 4162190 (1979-07-01), Ashworth
patent: 4199401 (1980-04-01), Liu et al.
patent: 4357758 (1982-11-01), Lampinen

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