Title:
【発明の名称】形成装置
Document Type and Number:
Japanese Patent JP2604681
Kind Code:
B2
Abstract:
A twin wire forming apparatus for forming a web from stock having an ash content above 20% has upstream end disposed closely adjacent to a headbox. A curved shoe cooperates with a second wire and is immediately downstream relative to the upstream end of the forming section. The second wire is between a first wire and the shoe, so that a first portion of water is removed through the first wire when the wires and the stock move over the shoe. A dewatering device is between the shoe and the downstream end of the forming section and cooperates with the first wire and is on the opposite side of the wires relative to the shoe. The dewatering device has a curvature which is less than, and opposite to that of the curved shoe. A second portion of water is removed from the stock through the second wire during movement of the stock and the wires over the dewatering device. A further dewatering shoe is between the dewatering device and the downstream end of the forming section, and cooperates with the second wire and is on the same side of the wires as the shoe. The further shoe is connected to a source of partial vacuum such that a third portion of water is removed from the stock through the second wire during movement of the stock and the wires over the further shoe.
Inventors:
Field, roderick
Harwood, John W
Jackson, Peter
Harwood, John W
Jackson, Peter
Application Number:
JP50084992A
Publication Date:
April 30, 1997
Filing Date:
April 15, 1992
Export Citation:
Assignee:
Beloit Technologies, Inc.
International Classes:
D21F9/02; D21F9/00; (IPC1-7): D21F9/02
Domestic Patent References:
| JP6175898A | ||||
| JP50152005A | ||||
| JP6314996A | ||||
| JP611953B2 |
Attorney, Agent or Firm:
Akasaka Saka (2 people outside)