Composite twist core-spun yarn and method and device for its production
US7493747B2 · kind B2 · utility
2Cited by
8References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 13, 2006 |
| Grant date | Feb 24, 2009 |
| Priority date | — |
| Expiry date | Mar 15, 2027 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD02G3/367
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A substantially torqueless composite dual core-spun yarn (10) is produced by introducing two slivers (30A,30B) forming a covering (30) together with a central (20) core in a spinning triangle (40). The core (20) is fed overtwisted S or Z and the slivers (30A,30B) have an opposite Z or S twist corresponding to about 30% to 70% of the twist of the fed overtwisted core (20) that detwists during spinning. The inelastic core (20) is fed at controlled speed to compensate for the angle of feed and to compensate for detwisting, and is guided into the spinning triangle (40) by a guide groove (52) in a feed roller (50).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.