Method of and apparatus for producing a friction spun yarn
US4773209A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1988 |
| Grant date | Sep 27, 1988 |
| Priority date | — |
| Expiry date | Mar 11, 2008 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01H4/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The method of, and apparatus for, producing a yarn uses a friction spinning device comprising a perforated first friction spinning drum and a second friction spinning drum which can also be perforated. Two fiber feed passages project to the first friction spinning drum and are each supplied by opening assemblies which individualize or individually separate the fibers. The fibers are transported toward the first friction spinning drum using a feed air stream in the fiber feed passages. This feed air stream is produced by the first friction spinning drum which is maintained under sub-pressure. Advantageously, the fiber double-feed to the friction spinning drum permits supplying two different fiber types to the same yarn end. Also, different inclinations of the fibers at the friction spinning drum can be obtained by different inclinations of the fiber feed passages in order to produce yarns of different character.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.