Twin wire former of paper machine

Details Twin wire former of paper machine Twin wire former of paper machine

1994-11-22

1996-12-10

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

162273, 162300, D21F 100

Patent

active

055826881

ABSTRACT:
A twin wire former of a paper machine can perform dewatering gently and symmetrically on the front and back sides of the wet paper, thereby producing paper with good yield and excellent front/back similarity. The twin wire former includes the loops of two wires, and first, second and third dewaterers, having large radii of curvature and disposed inside one and the other of the loops of the wires sequentially alternately between a point where a raw material jet alights on the wires and a couch roll, and the wire-run over this section is diagonal. The first and third dewaterers are disposed inside the loop of the wire and the second dewaterer is disposed inside the loop of the wire. This second dewaterer is pivotable about a point in the vicinity of its rear end, and the couch roll is a solid roll. This couch roll, a transfer suction box and the third dewaterer are mounted on a swing arm and can be pivoted for wire installation.

REFERENCES:
patent: 4790909 (1988-12-01), Harwood
patent: 5167770 (1992-12-01), Bubik et al.
patent: 5201999 (1993-04-01), Field et al.
patent: 5248392 (1993-09-01), Bando et al.
patent: 5259929 (1993-11-01), Bubik et al.
patent: 5300196 (1994-04-01), Kraft
patent: 5389206 (1995-02-01), Buck et al.

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