Twin wire former

Details Twin wire former Twin wire former

1992-01-23

1993-11-09

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

162300, 162352, D21F 902, D21F 136

Patent

active

052599299

ABSTRACT:
A twin wire former wherein the forming turbulence of a first forming section is quieted by a main forming roller. Behind the main forming roller, as viewed with respect to a predetermined direction of travel of the forming wires, there is accomplished a further forming of the paper web or sheet from the fiber stock suspension in a second forming section. Due to this arrangement there is possible optimum formation of the paper web or sheet with the use of very little dilution water for the fiber stock suspension. Additionally, due to intensive shear forces present in the second forming section flocks formed in the fiber stock suspension and the paper web or sheet at the region of the main forming roller, can be eliminated so that the structure of the paper web or sheet is made more uniform.

REFERENCES:
patent: 3876499 (1975-04-01), Vesanto
patent: 4125428 (1978-11-01), Phelps
patent: 4417950 (1983-11-01), Bubik et al.
patent: 4769111 (1988-09-01), Nevainen et al.
patent: 4790909 (1988-12-01), Harwood
patent: 4925531 (1990-05-01), Koski
patent: 4988408 (1991-01-01), Evalahti
patent: 5074964 (1991-12-01), Portonen
Baumann "New Top Wire Forming Unit . . . " Pulp & Paper Apr. 1989.

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