Press section with an equalizing nip for compensating for elonga

Details Press section with an equalizing nip for compensating for elonga Press section with an equalizing nip for compensating for elonga

1997-06-06

1999-03-02

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

1623591, 1623603, 1623585, D21F 304

Patent

active

058765654

ABSTRACT:
A press section in a paper machine through which a paper web has a closed and supported draw and a method and arrangement for compensating for elongation of the web in an equalizing press nip in the press section. The press section has at least two successive separate nips and dewatering of the paper web is carried out at least in the first one of these nips, preferably between two press fabrics that receive water. The last press nip in a running direction of the web is the equalizing press nip which may be separate from the preceding nip and in which no substantial dewatering is performed. The web may be passed through the equalizing press nip from the preceding dewatering press nip on a transfer belt substantially non-water-receiving. After the equalizing nip, the elongation of the paper web in the machine direction, which elongation takes place in the equalizing nip, is compensated for by a difference in speed of the transfer belt.

REFERENCES:
patent: 4483745 (1984-11-01), Wicks et al.
patent: 4526655 (1985-07-01), Karvinen et al.
patent: 4566946 (1986-01-01), Koponen et al.
patent: 4931143 (1990-06-01), Karvinen et al.
patent: 4943351 (1990-07-01), Wedel
patent: 4976820 (1990-12-01), Laapotti
patent: 5240563 (1993-08-01), Karvinen et al.
patent: 5389205 (1995-02-01), Pajula et al.
patent: 5545295 (1996-08-01), Fujita et al.

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