Method for producing a filament yarn with alternating S- and Z-twists
US6311467A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 2000 |
| Grant date | Nov 6, 2001 |
| Priority date | — |
| Expiry date | Dec 19, 2020 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD02G1/02
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for producing a filament yarn with alternating S- and Z-twists. The yarn is moved between two twisting stops and submitted alternatively to S- and Z-twisting by at least one false twisting unit. The twists are fixed in a fixing unit situated downstream from the false twisting unit. The twisting stop downstream of the fixing unit is moved synchronously with the yarn and held in a yarn engagement position to stop the twisting until at least the twisting inversion points is fixed in the yarn. At least one other twisting stop oriented at a distance from the above mentioned moving twisting stop is engaged with the yarn in a way to stop the twisting and is moved along with the yarn before said yarn is submitted to an opposite twisting by the false twisting unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.