Method and apparatus for detaching a traveling web from two wire

Details Method and apparatus for detaching a traveling web from two wire Method and apparatus for detaching a traveling web from two wire

1994-01-21

1996-07-30

Czaja, Donald E.

Paper making and fiber liberation

Processes and products

Running or indefinite length work forming and/or treating...

162205, D21F 1104

Patent

active

055408176

ABSTRACT:
A method and apparatus for temporarily separating a web from one of the two wire belts in a twin wire zone in a paper making machine. In the twin wire zone, the negative pressure from a suction box is applied to the first wire belt for temporarily deflecting and separating the first wire belt and the web from the second wire belt and the wire belts then returning to contact the web following the suction box. The wire belts are then successively separated from the web by an appropriate guide and take up device. The take up device may comprise a press which includes a press nip defined by one of a suction roll over which the second wire in the web is passing or another type of roll or a flexible support device like a rotating press jacket. A smooth surface, such as that of a roll, forms a press nip with the support device for the second wire belt and after that press nip, the web adheres to the smooth surface to be transported further through the machine.

REFERENCES:
patent: 4430159 (1984-02-01), Bubik et al.
patent: 4554052 (1985-10-01), Waris
patent: 5019214 (1991-05-01), Meinecke et al.
patent: 5074966 (1991-12-01), Koivuranta
patent: 5306395 (1994-04-01), Myren
patent: 5389206 (1995-02-01), Buck et al.

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