Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Patent
1978-04-18
1979-08-14
Silverberg, Sam
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
264188, 425 71, 4253261, B29F 310, D01F 108
Patent
active
041645367
ABSTRACT:
Fibrous casing is manufactured wherein a paper tube is passed downwardly over a mandrel and impregnated with viscose. The interior and exterior sidewalls of the tube are contacted with a coagulating liquid to regenerate cellulose on the tube walls. Spent coagulating liquid is withdrawn from the tube interior by the imposition of a pressure differential on the liquid. Withdrawal of the liquid also causes the walls of the descending tube to be drawn into disadvantageous wiping contact with the mandrel surface. This wiping contact is reduced or substantially eliminated by introducing a gas, e.g., air, at a low positive pressure, into the spent liquid being withdrawn from the tube to form a fluid mixture having a specific gravity less than that of the liquid.
REFERENCES:
patent: 3679437 (1969-05-01), Oppenheimer
patent: 3833022 (1974-09-01), Turbak
Brown C. E.
Kerwin J. E.
Shapiro Paul
Silverberg Sam
Teepak, Inc.
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