Paper making and fiber liberation – Processes and products – Running or indefinite length work forming and/or treating...
Patent
1977-04-21
1979-06-12
Fisher, Richard V.
Paper making and fiber liberation
Processes and products
Running or indefinite length work forming and/or treating...
34 16, 34155, 162208, 162290, 162307, 162308, D21F 1100
Patent
active
041579380
ABSTRACT:
A web dewatering concept which has particular utility in papermaking processes wherein overall compression and compaction of the paper web by mechanical means is avoided comprising a high pressure jet of compressible fluid such as air or steam emitting from a slot extending across the entire width of the web. The web is constrained between a pair of foraminous supporting members while it is passed across a slotted nozzle expelling a jet of compressible fluid at pressures up to about 50 psig. The jet of compressible fluid scrubs the free water from the spaces between the fiber matrix of the web and the foraminous supporting members. The edges of the slotted nozzle make intimate contact with and form a seal against the interior surface of the foraminous supporting member closest the nozzle. This causes direct penetration of the web and the carrying members by the fluid jet, thereby continuously expelling an atomized stream of moisture from the web. The jet is operated at pressures P<T/R where T=tension in the foraminous support member furthest removed from the nozzle and R=minimum radius said foraminous support member is capable of assuming across the slotted nozzle without lift-off of the composite structure at the nozzle and consequent sheet disruption.
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Clemens Matthew L.
Morton Wendell J.
Chin Peter
Fisher Richard V.
Gorman John V.
Linman E. Kelly
The Procter & Gamble & Company
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