Title:
【発明の名称】ウェブ支持方法およびウェブ支持装置
Document Type and Number:
Japanese Patent JP2003515685
Kind Code:
A
Abstract:
A method and device for stabilizing the movement of a web in the press section of a paper or board machine in rectilinear transfer of the web, while supported by a fabric (20), from a roll (23) to a second roll (31). With the aid of the web support device (60) according to the invention, the vacuum effect is intensified in critical areas such as in the opening and closing gaps, and also in the edge areas of the web (W). To said areas, greater blowing speeds than earlier are directed from ejection nozzles (61a, 61b, 62a, 62b) and/or to said areas, suction slots (63a, 63b) are connected to intensify the suction. In the wide transverse central area of the web in machine and cross-machine direction, the vacuum effect is limited by arranging a controlled leakage flow (64) or vacuum reduction flows implemented with limited counterblow. In this manner, a vacuum effect greater than before is concentrated to the adjacency of the support rolls (23, 31) of the fabric and to its edge areas.
Inventors:
La Apotti, Yoruma
Application Number:
JP2001542634A
Publication Date:
May 07, 2003
Filing Date:
November 30, 2000
Export Citation:
Assignee:
Metso Paper Inc.
International Classes:
D21F3/00; B65H20/10; D21F3/04; D21G9/00; (IPC1-7): D21F3/00
Domestic Patent References:
| JPS61266693A | 1986-11-26 | |||
| JPH0744763U | 1995-11-28 | |||
| JPH11512791A | 1999-11-02 | |||
| JPS6485390A | 1989-03-30 | |||
| JP2002544408A | 2002-12-24 | |||
| JP2002519537A | 2002-07-02 |
Attorney, Agent or Firm:
Takao Katori