Paper machine with single-wire and curved twin-wire formers

Details Paper machine with single-wire and curved twin-wire formers Paper machine with single-wire and curved twin-wire formers

1976-09-15

1977-10-25

Fisher, Richard V.

Paper making and fiber liberation

Apparatus

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

162301, 162305, 162306, 162359, 162360R, D21F 900

Patent

active

040554619

ABSTRACT:
A paper machine, particularly adapted for manufacturing tissue paper, has inner and outer endless fabrics, each in the form of a wire or felt, guided around a smooth forming roll where the inner fabric is situated next to the forming roll between the latter and the outer fabric to define at the forming roll a curved twin-wire former. The outer fabric has an elongated portion situated in advance of the twin-wire former and spaced from the inner fabric to form a single-wire former which receives stock from a headbox and with which a suitable dewatering structure cooperates so that a considerable amount of water has been removed from the web forming on the single-wire former by the time the web reaches the twin-wire former. At the end of the twin-wire former distant from the single-wire former, the inner and outer fabrics are separated from each other and the web is transferred to the inner fabric by way of the normal table roll effect between the inner fabric and the smooth forming roll. At a part of the inner fabric which is distant from the smooth forming roll there is a pick-up structure for picking up the web from the inner fabric and directing the web to the press and dryer sections of the machine.

REFERENCES:
patent: 3846232 (1974-11-01), Kankaanpaa
patent: 3891500 (1975-06-01), Kankaanpaa
patent: 3981084 (1976-09-01), Sobota
patent: 3985612 (1976-10-01), Watanabe
patent: 3997390 (1976-12-01), Kankaanpaa

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