Paper making and fiber liberation – Apparatus – Running or indefinite length product forming and/or treating...
Patent
1978-05-03
1979-09-11
Fisher, Richard V.
Paper making and fiber liberation
Apparatus
Running or indefinite length product forming and/or treating...
162300, 162301, 162306, 162340, 162347, 162351, D21F 102, D21F 140, D21F 902
Patent
active
041674413
ABSTRACT:
A two-wire papermaking system for the formation of paper from paper slurry includes a first section where the slurry is maintained under pressure in a condition of minimum pond height under the guidance of a looped lower (bottom) web carrying wire having a single run over a progressive series of independently controlled dewatering boxes immediately prior to passage from the headbox through the adjacent slice and a second section comprising two wires (the said web carrying wire and a looped top or covering wire) facing each other (and between which the forming web is enclosed) and guided conjointlyover a dewatering roll to follow a downwardly curved path while secondary dewatering ensues through the top wire due to centrifugal forces before passage over a suction transfer roll where a first transfer from the bottom (forming) wire to the top wire ensues preparatory to passage over a vacuum transfer box for a second transfer from the top wire to a wet web saturator fabric or a through dryer fabric for delivery of the wet web to the saturator or through dryer, as desired, for final web forming.
REFERENCES:
patent: 3631982 (1972-01-01), Lejeune
patent: 3729374 (1973-04-01), Lissalde
patent: 3846233 (1974-11-01), Kankaanpaa
patent: 3997390 (1976-12-01), Kankaanpaa
patent: 4055461 (1977-10-01), Turunen
Fisher Richard V.
Sandy Hill Corporation
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