Twin-wire former for papermaking machine

Details Twin-wire former for papermaking machine Twin-wire former for papermaking machine

1986-09-21

1987-08-11

Bashore, S. Leon

Paper making and fiber liberation

Apparatus

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

162301, 162303, D21F 136, D21F 140

Patent

active

046860045

ABSTRACT:
A twin-wire former for a paper machine which can produce paper of good formation over a wide range of basis weight and at a speed of wide variation essentially consisting of a top wire and a bottom wire. The bottom wire with a wet material thereon substantially horizontally travels. The top wire approaches the material from above and travels downward together with the bottom wire on the circumference of a supporting member provided in the loop of the bottom wire while pressing the material between the pair of wires. At the position of a force roll provided in the loop of the top wire, the pair of wires commence travelling upwardly through a suction box to a couch roll, where the pair of wires separate from each other. To adjust the wire contacting angle of the supporting member, and hence, to improve the formation of paper, each of a water receiver, the force roll and suction boxes and made movable.

REFERENCES:
patent: 4220502 (1980-09-01), Levanen
patent: 4414061 (1983-11-01), Trufitt et al.
patent: 4417950 (1983-11-01), Bubik et al.
patent: 4447295 (1984-05-01), Bubik et al.
patent: 4459175 (1984-07-01), Bubik et al.
patent: 4523978 (1985-06-01), Pullinen
Pulp and Paper, 1984, "Top Flyte Former" advertisement.

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