Wet press for a paper making machine

Details Wet press for a paper making machine Wet press for a paper making machine

1994-01-21

1996-03-26

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

D21F 302

Patent

active

055017754

ABSTRACT:
A wet press for a paper making machine presses out water from a moist paper web. The wet press has a plurality of press rolls, preferably five. The press rolls are paired so that each pair defines a respective press nip. There are preferably at least four press nips defined by the paired press rolls. The press rolls are so placed and the press nips are so defined and the web is so trained on the path through the wet press that the paper web is always supported by the outer surface of one of the press rolls on the web path from the first press nip to the last press nip. At the second press nip in the path of the web, each of the press rolls there forms a felt free second press nip and each of the press rolls at the second nip has a closed outer surface. The same may be true for the fourth press nip. Some of the press rolls may be shoe press rolls.

REFERENCES:
patent: 2694348 (1954-11-01), Beachler
patent: 3584570 (1971-06-01), Sass et al.
patent: 3861996 (1975-01-01), Dorfel
patent: 4075056 (1978-02-01), Ely et al.
patent: 4086131 (1978-04-01), Rempel et al.
patent: 4285766 (1981-08-01), Kankaanpaa
patent: 4483745 (1984-11-01), Wicks et al.
patent: 4556451 (1985-12-01), Ely
patent: 4988410 (1991-01-01), Meinecke et al.
patent: 5178732 (1993-01-01), Steiner et al.
patent: 5256257 (1993-10-01), Schiel

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