Method for the manufacture of twistless or substantially twistless yarn
US4228643A · kind A · utility
2Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1978 |
| Grant date | Oct 21, 1980 |
| Priority date | — |
| Expiry date | Nov 24, 1998 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01H13/302
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In a method for the manufacture of twistless yarn a sliver of staple fibre material is drafted in two drafting zones, which are separated by a neutral zone. The drafting in the first zone occurs in a dry condition and in the second zone in a wet condition. The drafting liquid, which can contain a bonding agent, is supplied to the sliver through a false twister inserted in the neutral zone. This drafting process provides an increased uniformity of twistless yarn in a range of counts of 10-300 tex at a production rate of 300 to 600 m/min.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.