Method and device for dewatering a paper or board web and passin

Details Method and device for dewatering a paper or board web and passin Method and device for dewatering a paper or board web and passin

1998-04-02

2000-10-17

Hastings, Karen M.

Paper making and fiber liberation

Processes and products

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

162210, 162217, 162306, 1623602, D21F 200, D21F 302

Patent

active

061325597

ABSTRACT:
A method and device for dewatering a paper or board web and passing the web as a closed draw from a lower wire of a web forming section, in which the web is formed between the lower wire and an upper wire, to the press section and through one or more dewatering press nips in the press section. The web is separated from the upper wire on a first suction zone or block of the suction roll, after which the web is affixed to the lower wire over a second suction zone or block of the suction roll. The web is then affixed, in a pre-press and transfer nip formed by the suction roll and a smooth-faced roll, onto the outer face of a substantially non-watering-receiving transfer belt, the web being passed on support of this belt into the first press nip. In the press nip, water is pressed out of the web into a water-receiving press felt.

REFERENCES:
patent: 5034100 (1991-07-01), Sides
patent: 5389206 (1995-02-01), Buck et al.
patent: 5466342 (1995-11-01), Kankaanpaa
patent: 5468349 (1995-11-01), Schiel
patent: 5501775 (1996-03-01), Kotitschke et al.
patent: 5540817 (1996-07-01), Schiel
patent: 5792320 (1998-08-01), Kaasalainen et al.

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