Paper making and fiber liberation – Apparatus – Apparatus repair – cleaning or conditioning
Patent
1993-03-02
1995-02-28
Hastings, Karen M.
Paper making and fiber liberation
Apparatus
Apparatus repair, cleaning or conditioning
1623603, 1623591, D21F 304
Patent
active
053933834
ABSTRACT:
The invention relates to a closed press section in a paper machine and comprises a compact combination of press rolls. Several of the rolls define press nips with each other, between which nips the web has a closed draw supported by the face of a fabric. The press section has a center roll in connection with which a press nip or press nips are provided. A closed loop of a transfer band is passed around the center roll. The web is transferred on an outer face of the transfer band after the last press nip in the compact combination of rolls as a closed and constantly supported draw onto a drying wire in a drying section following after the press section. The transfer band loop is made of a transfer band fabric that substantially does not receive water and does not rewet the web. The web-adhesion properties of the outer face of the transfer band fabric are chosen so that, after the last nip, the web follows the transfer band fabric, and so that the web can be transferred as a fully closed draw onto the drying wire. In connection with the loop of the transfer band fabric, means for conditioning of the band and/or safety devices are provided, by whose means an adequate operation of the transfer band fabric is maintained.
REFERENCES:
patent: 3185617 (1965-05-01), Justus
patent: 3285806 (1966-11-01), Justus et al.
patent: 4359827 (1982-11-01), Thomas
patent: 4359828 (1982-11-01), Thomas
patent: 4483745 (1984-11-01), Wicks et al.
patent: 4526655 (1985-07-01), Karvinen et al.
patent: 4648942 (1987-03-01), Wanke et al.
patent: 4889598 (1989-12-01), Niskanen
patent: 4919762 (1990-04-01), Laapotti et al.
patent: 4943351 (1990-07-01), Wedel
patent: 4976821 (1990-12-01), Laapotti
patent: 5022163 (1991-06-01), Ilvespaa et al.
patent: 5037509 (1991-08-01), Wedel
patent: 5049239 (1991-09-01), Autio
patent: 5240563 (1993-08-01), Karvinen et al.
Karvinen Mikko
Kerttula Reima
Laapotti Jorma
Pajula Juhani
Hastings Karen M.
Valmet Paper Machinery Inc.
LandOfFree
Compact press section with closed draw of the web in a paper mac does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compact press section with closed draw of the web in a paper mac, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compact press section with closed draw of the web in a paper mac will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-846021