Method and apparatus for the manufacture of fibrous casing

Details Method and apparatus for the manufacture of fibrous casing Method and apparatus for the manufacture of fibrous casing

B - Operations, Transporting

05

C

117/69, 32/22.5

B05C 7/04 (2006.01) A22C 13/00 (2006.01) B05D 7/22 (2006.01) B29C 47/00 (2006.01) B29C 47/02 (2006.01)

Patent

CA 1146021

ABSTRACT OF THE DISCLOSURE 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 Spent coagulating liquid is withdrawn from the tube interior by the imposition of a pressure differential on the liquid.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or substantially eliminated by introducing a gas, e.g., air, at a low positive pressure, into the spent liquid being withdrawn from the tube to form a fluid mixture having a specific gravity less than that of the liquid.

319693

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