Method of and an arrangement for passing a fibre web from a wire

Details Method of and an arrangement for passing a fibre web from a wire Method of and an arrangement for passing a fibre web from a wire

1991-03-25

1992-06-23

Hastings, Karen M.

Paper making and fiber liberation

Processes and products

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

162306, 1623601, D21F 304, D21F 200

Patent

active

051240009

ABSTRACT:
A method and an arrangement for passing a fibre web (25) from a wire (3) of a former (1) through a press section (2) including at least three nips (N1, N2, N3) each formed by a pair of press rolls. The method involves transferring the web (25) from the wire (3) onto a sucession of press felts (7) and passing it through the nips (N1, N2, N3) so that it is all the time from the separating point of the web (25) and the wire (3) at least up to the third nip (N3) supported on both sides and in contact with at least one felt (7, 13, 18) acting as a support element. Another support element includes suction zones in various ones of the press rolls for causing air pressure to press the web against the press felt on which it is being conveyed. The arrangement includes press rolls (6, 8, 12, 15, 16) forming at least three nips (N1, N2, N3), and at least one press felt (7, 9, 13, 18) for each nip (N1, N2, N3), and support elements for supporting the web (25) on both sides all the time from the separating point of the web (26) and the wire (3) at least up to the third nip (N3).

REFERENCES:
patent: 2415351 (1947-02-01), Hornbostel et al.
patent: 4086131 (1978-04-01), Rempel et al.
patent: 4483745 (1984-11-01), Wicks et al.
patent: 4595745 (1985-07-01), Cronin
patent: 4681659 (1987-07-01), Sbaschnigg
patent: 4792381 (1988-12-01), Pajula
patent: 4874470 (1989-10-01), Skaugen

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