Manufacture of bulked yarn
US4081948A · kind A · utility
5Cited by
7References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 7, 1977 |
| Grant date | Apr 4, 1978 |
| Priority date | — |
| Expiry date | Feb 7, 1997 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD02G1/0286
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Textile filaments are melt-spun, formed into a yarn, heated, cooled and false twisted while being simultaneously drawn, the upstream propagation of twist from the false twist device being arrested at the entry to the heater and the draw point of the yarn being stabilized on the heater. The twist arresting and draw point stabilizing means may be an abutment or pin with some filaments passing on each side, a radially pinned rotor, nip rolls or two parallel plates between which single filaments, but not twisted yarn, may pass. The false twist crimped yarn may be heat relaxed before wind up.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.