Title:
【発明の名称】ウエブフォーマにおけるウエブの再湿潤防止方法および装置
Document Type and Number:
Japanese Patent JPH11514710
Kind Code:
A
Abstract:
PCT No. PCT/FI97/00487 Sec. 371 Date May 4, 1998 Sec. 102(e) Date May 4, 1998 PCT Filed Aug. 22, 1997 PCT Pub. No. WO98/10138 PCT Pub. Date Mar. 12, 1998The invention relates to a method for preventing rewetting of a web in a former. Water is removed from the web (W) by means of dewatering members. The web (W) is formed by forming members and forming rolls on support of a wire loop/loops. The wire loop/loops (10) is/are guided by alignment, guide and/or suction rolls (11, 12). The web (W) supported by a wire (10) is passed by at least two vacuum boxes/chambers (16, 17) after the last suction roll (11). At least two vacuum boxes/chambers (16, 17) are fitted after the last suction roll (11). The web (W) and the wire (10) are arranged to be dewatered by means of a first vacuum box/chamber (16). The transport of moisture from the wire (10) back into the web (W) is prevented by means of a second vacuum box/chamber (17), and a vacuum (P1) in the first vacuum box/chamber (16) is higher than a vacuum (P2) in the second vacuum box/chamber (17).
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Inventors:
Reinonen, Antti
Application Number:
JP51227598A
Publication Date:
December 14, 1999
Filing Date:
August 22, 1997
Export Citation:
Assignee:
Valmet Corporation
International Classes:
D21F1/48; D21F1/52; D21F2/00; D21F9/00; (IPC1-7): D21F1/52
Attorney, Agent or Firm:
Takao Katori