Two-sided drainage in a roll-type twin-wire former

Details Two-sided drainage in a roll-type twin-wire former Two-sided drainage in a roll-type twin-wire former

1979-02-09

1980-06-24

Fisher, Richard V.

Paper making and fiber liberation

Processes and products

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

162301, 162306, 162DIG7, D21F 110, D21F 1100, D21F 140

Patent

active

042093600

ABSTRACT:
Methods and apparatus for producing a web by injecting a jet of stock between two tensioned wires and running the wires over a circumferentially grooved forming cylinder. The cylinder grooves and a zone immediately on the other side of the wires extending from the forming throat where the web is injected to the web run-off point are in direct, open communication with the ambient atmosphere so that water is drained inwardly and outwardly of the forming cylinder as the web is being formed. The jet stock size, wire speed and wire tension are adjusted in relation to the radius of the forming cylinder so that the inward and outward drainage of liquid from the web occurs in relative amounts sufficient to avoid substantial two-sidedness of the web thus produced.

REFERENCES:
patent: 3017928 (1962-01-01), Pedrick
patent: 3311533 (1967-03-01), De Montigny et al.
patent: 3821076 (1974-06-01), Stenberg et al.
patent: 4028175 (1977-06-01), Schiel
patent: 4113556 (1978-09-01), Kankaanpaa
patent: 4116763 (1978-09-01), Stotz et al.

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