Process and device for producing a yarn having alternate twists of opposite directions
US4351146A · kind A · utility
19Cited by
10References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1980 |
| Grant date | Sep 28, 1982 |
| Priority date | — |
| Expiry date | Jul 7, 2000 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD02G3/286
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for producing a yarn with alternate twist, which is obtained by intermittently varying the distance which the twist extends back upstream of a false twister. The variation in the distance is produced without braking the yarn and is achieved by means of a blocking device acting intermittently at a point located close to the false twister. The duration of action of the blocking device approximately corresponds to the time taken by a given point on the yarn to cover the distance from a delivery member to the false twister.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.