Method of and apparatus for substantially equal compacting and d

Details Method of and apparatus for substantially equal compacting and d Method of and apparatus for substantially equal compacting and d

1984-08-22

1985-12-03

Alvo, Steve

Paper making and fiber liberation

Processes and products

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

162305, 1623601, 29132, 100163R, D21F 304, D21F 308, D21F 310

Patent

active

045564515

ABSTRACT:
In a paper making machine dewatering press section substantially equally pressing and dewatering of both faces of a freshly felted paper sheet web is effected by running the web through first press roll means providing a double action first dewatering nip between corunning porous dewatering felts, and successively thereafter running the web through a four roll stack providing second, third and fourth nips without an open paper draw. In the second nip the web is run in dewatering felt engagement with one face of the web, and the opposite face of the web is in direct non-dewatering surface compacting roll engagement in such nip. In the third nip both faces of the web are in direct surface compacting engagement with the non-dewatering press rolls. In the fourth nip, a second dewatering felt runs in engagement with said opposite face of the web and said one face of the web is in non-dewatering surface compacting press roll engagement. The web leaves the press section as a paper sheet having both faces substantially equally compacted and dewatered.

REFERENCES:
patent: 2672078 (1954-03-01), Hornbostel
patent: 3023805 (1962-03-01), Walker
patent: 3198693 (1965-08-01), Justus
patent: 3198697 (1965-08-01), Justus
patent: 3262840 (1966-07-01), Hervey
patent: 3268390 (1966-08-01), Ely, Sr.
patent: 3286360 (1966-11-01), Walker
patent: 4075056 (1978-02-01), Ely et al.
patent: 4086131 (1978-04-01), Rempel et al.
patent: 4188262 (1980-12-01), Kankaanpaa
patent: 4197158 (1980-04-01), Johnson

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