Air nozzle for fasciated yarn spinning
US4476672A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1982 |
| Grant date | Oct 16, 1984 |
| Priority date | — |
| Expiry date | Dec 2, 2002 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01H1/115
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An air nozzle utilized for false-twisting a fiber bundle to form a fasciated yarn, comprising, in series, an inlet and a fiber passage provided with at least a jet for generating a vortex within the fiber passage. The inlet has an opening of a flattened shape having upper and lower walls longer than the side walls thereof and has a size decreasing toward the fiber passage. The edge portion of the ribbon-like fiber bundle passing through the air nozzle strongly contacts the upper and lower walls of the inlet during the twisting operation by the vortex. As a result of frictional resistance with the walls, the twist angle of the edge portion fibers becomes less than that of the core portion fibers. This causes a tightly fasciated effect of the edge portion fibers onto the core portion fibers during the untwisting operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.