Title:
【発明の名称】紙ウェブを乾燥させる方法
Document Type and Number:
Japanese Patent JPH08509529
Kind Code:
A
Abstract:
PCT No. PCT/SE94/00387 Sec. 371 Date Oct. 31, 1995 Sec. 102(e) Date Oct. 31, 1995 PCT Filed Apr. 29, 1994 PCT Pub. No. WO94/25671 PCT Pub. Date Nov. 10, 1994When drying a paper web (4) in a dryer section (1) of a paper machine provided with drying cylinders (2, 3) and drying wires (5, 6), shrinkage of the paper web in cross direction is counteracted by applying forces at its edge portions (11). According to the invention partial vacuum is maintained along the edge portions of the web within substantially the entire free draw (10) and is applied from the side of the drying wire (5, 6) facing away from the web (4) so that the web is sucked firmly against the drying wire by forces greater than the contracting forces acting in cross direction, thereby counteracting shrinking, said partial vacuum being set within the interval 0.1-0.8 bar, preferably 0.2-0.5 bar.
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Inventors:
Hansson Torbyjorn
Olofson Il Yale
Olofson Il Yale
Application Number:
JP52417294A
Publication Date:
October 08, 1996
Filing Date:
April 29, 1994
Export Citation:
Assignee:
Valmet Karlstad Activolag
International Classes:
D21F5/04; D21F7/08; (IPC1-7): D21F7/08; D21F5/04
Attorney, Agent or Firm:
Minoru Nakamura (6 outside)