Method of making elastic yarn
US4150529A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 14, 1978 |
| Grant date | Apr 24, 1979 |
| Priority date | — |
| Expiry date | Apr 14, 1998 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD02G3/322
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A balanced elastic yarn includes an elastomeric core twisted in one direction and a single cover strand helically wrapped about the elastic core in a direction opposite to the twist direction of the elastic core. After a predetermined twist has been inserted in the elastic core, the core is tensioned with the elongation being positively controlled between spaced points intermediate the yarn take up and the elastic core supply and a high number of wraps per inch of the cover strand are helically wound about the elongated core while the core draft or stretch is positively controlled. The elastic core take-up package is subjected to heat to relieve the stresses in the cover strand resulting in a balanced elastic yarn in the relax state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.