Method of making a tubular collagen casing
US4138503A · kind A · utility
16Cited by
6References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 3, 1977 |
| Grant date | Feb 6, 1979 |
| Priority date | — |
| Expiry date | Aug 3, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA22C2013/0056
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of making a tubular collagen casing includes extruding collagen gel into two sets of gel ropes, each of the sets comprising a plurality of ropes. The ropes in one of the sets are directed radially outwardly and helically in one direction to form a first tubular layer. In the other set, the ropes are directed radially inwardly and helically in the opposite direction to form a second tubular layer concentric with the first layer. Following this, the layers are hardened in united relationship with one another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.