Press section with an equalizing nip in a paper machine

Details Press section with an equalizing nip in a paper machine Press section with an equalizing nip in a paper machine

1995-10-06

1997-09-02

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

1623583, 1623591, 162306, D21F 300

Patent

active

056627785

ABSTRACT:
A press section in a paper machine through which a paper web has a closed and supported draw. The press section has at least two successive separate press nips and dewatering of the paper web is carried out at least in the first one of these press nips, preferably between two press fabrics that receive water. The last press nip in the press section is an equalizing press nip which is separate from the preceding nip and in which no substantial dewatering is performed. The paper web is passed through the equalizing press nip from the preceding dewatering press nip on a transfer belt substantially not receiving water, on its substantially straight run. This run is continued after the equalizing nip as a run of substantially the same direction, on which run, some of the elongation of the paper web in the machine direction is compensated for, which elongation takes place in the equalizing nip, 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: 5389205 (1995-02-01), Pajula et al.

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