Press section of a paper or paperboard making machine

Details Press section of a paper or paperboard making machine Press section of a paper or paperboard making machine

1991-10-24

1993-12-14

Jones, W. Gary

Paper making and fiber liberation

Apparatus

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

162361, D21F 308

Patent

active

052698858

ABSTRACT:
The invention concerns a press section of a paper or paperboard making machine, comprising a number of rolls (1, 11, 22, 32, 44, 70) which forms press nips (N.sub.1, N.sub.2, N.sub.3, N.sub.4) that dewater the web (W) with each other, the web being arranged to run through these nips. Of the rolls at least one roll (1;70) is a smooth-faced so-called center roll, which forms a press nip (N.sub.2, N.sub.3 ;N.sub.4) with at least one other press roll (11, 32, 44), over which a press felt (10, 30; 40), which has been formed as an endless loop, is passed to absorb water from the web (W). The center roll (1; 70) in accordance with the invention is a variable-crown roll, which comprises a metallic roll mantle (2; 71) arranged to revolve around a stationary roll axle (3; 72). The roll includes at least one set of crown-variation members (4, 5; 73), which are arranged to load the roll mantle (2; 71) in the direction of the nip plane (K.sub.2, K.sub.3 ; K.sub.4) of the center roll (1; 70) and the roll (11, 32; 44) that forms a press nip N.sub.2, N.sub.3 ; N.sub.4) with the center roll so as to regulate the linear load profile in the nip (N.sub.2, N.sub.3 ; N.sub.4).

REFERENCES:
patent: 4086131 (1978-04-01), Rempel et al.
patent: 4209361 (1980-06-01), Kankaanpaa
patent: 4224104 (1980-09-01), Kankaanpaa
patent: 4520723 (1985-06-01), Par
patent: 4975153 (1990-12-01), Nelson
patent: 4988410 (1991-01-01), Meinecke et al.

Affiliated with

Also associated with

Rating

Press section of a paper or paperboard making machine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Press section of a paper or paperboard making machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Press section of a paper or paperboard making machine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1702020