Method and apparatus for the manufacture of fibrous casing
US4164536A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 18, 1978 |
| Grant date | Aug 14, 1979 |
| Priority date | — |
| Expiry date | Apr 18, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/919
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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 Spent coagulating liquid is withdrawn from the tube interior by the imposition of a pressure differential on the liquid.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or substantially eliminated by introducing a gas, e.g., air, at a low positive pressure, into the spent liquid being withdrawn from the tube to form a fluid mixture having a specific gravity less than that of the liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.