Common wire path of a wet end section of a twin wire paper makin

Details Common wire path of a wet end section of a twin wire paper makin Common wire path of a wet end section of a twin wire paper makin

1989-02-03

1990-10-02

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

162300, 162303, D21F 100

Patent

active

049604929

ABSTRACT:
The invention relates to a wet end section of a twin wire paper machine. Each wire forms a wire loop. The wires are led together along a vertical, rising, common path, which starts at a wedge shaped feed nip at the bottom of the common path. The nip is formed by the two wires and is defined by a forming cylinder arranged in the loop of the inner wire. Inside the other outer wire, there is a fixed curved surface or outer surface having a center of curvature which lies on one side of the rising common wire path. A further curved inner surface which follows the outer surface along the wire path is provided on a doctor blade carrier or pivotable crossbeam located inside the loop of the inner wire. This is followed by a suction roll arranged in the loop of the outer wire. The length of the further inner surface is shorter than the length of the outer surface.

REFERENCES:
patent: 3726758 (1973-04-01), Parker et al.
patent: 3839143 (1974-10-01), Suckow
patent: 3884756 (1975-05-01), Gustafson
patent: 3944464 (1976-03-01), Means
patent: 3944774 (1976-11-01), Halme et al.
patent: 4113556 (1978-09-01), Kankaanpaa
patent: 4609435 (1986-09-01), Tissari
patent: 4623429 (1986-11-01), Tissari
patent: 4686004 (1987-08-01), Fujiwara
patent: 4790909 (1988-12-01), Harwood
"Zellstoff und Papier", 1979, Edition 4, p. 176.

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