Method and apparatus for producing a fasciated yarn
US4621490A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 14, 1983 |
| Grant date | Nov 11, 1986 |
| Priority date | — |
| Expiry date | Jul 14, 2003 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01H1/115
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and an apparatus for producing a fasciated yarn, utilizing an air nozzle for false-twisting a fiber bundle. The apparatus is provided with a fiber passage comprising an inlet portion, a small channel, and a large channel, and is provided also with a contact area on an inner wall of the small channel, this contact area being formed by the intersection at an angle of the small channel and the large channel. During the spinning operation, the fiber bundle is forced against the contact area, effectively suppressing a twist imparted by a vortex such that it does not ascend toward the upstream region. Also, since ballooning can be suppressed by the contact area, the size of the small channel can be increased, resulting in the intake by suction of a sufficient amount of air in the inlet portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.