False twist machine
US4218870A · kind A · utility
6Cited by
5References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 18, 1978 |
| Grant date | Aug 26, 1980 |
| Priority date | — |
| Expiry date | Dec 18, 1998 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD02G1/082
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An improved false twist machine employing a friction disc arrangement which provides high twist in the multi-filament yarn on the entering side and increased yarn feeding rate on the outlet side to reduce the tension of the exiting yarn to lessen the number of filament breaks. The friction disc arrangement has discs of increased thickness to diameter ratio on the entering side when compared to the exit side, to provide increased yarn angle to accomplish the desired high twist. The reduced thickness to diameter ratio on the exit side increases yarn forwarding action, thus reducing the outlet tension.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.