Heating method and device in a paper machine press section provi

Details Heating method and device in a paper machine press section provi Heating method and device in a paper machine press section provi

1991-05-30

1992-06-09

Hastings, Karen M.

Paper making and fiber liberation

Processes and products

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

162359, 1623601, D21F 304

Patent

active

051204002

ABSTRACT:
Method and device for intensifying the dewatering of a web in a paper machine press section having a compact roll combination and a separate press. The web is pressed in press nips formed by a compact roll combination. Thereafter, the web is transferred on a paper guide roll onto the outer face of the press felt of the separate press, on which felt the web is transferred into the nip of the separate press. The web runs over the lower sector of the paper guide roll and before the web is transferred into the nip of the separate press, the web as well as the press felt of the separate press are heated by means of heating devices. By means of these devices, the temperature levels both of the web and of the outer face of the press felt of the separate nip which felt reaches contact with the web are raised so that the dewatering is substantially intensified in the separate nip.

REFERENCES:
patent: 3560333 (1971-02-01), Douglas et al.
patent: 4163688 (1979-08-01), Kankaanpaa
patent: 4351700 (1982-09-01), Dove
patent: 4662398 (1987-05-01), Wywailowski et al.
patent: 4874470 (1989-10-01), Skaugen
patent: 4919762 (1990-04-01), Laapotti et al.
patent: 4976820 (1990-11-01), Laapotti et al.

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