Manufacture of yarn spun on closed-end, high draft spinning systems
US5848524A · kind A · utility
Inventors
Key dates
| Filing date | Jun 5, 1997 |
| Grant date | Dec 15, 1998 |
| Priority date | — |
| Expiry date | Jun 5, 2017 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01H5/28
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A twisted yarn structure includes constituent fibers which extend between a surface and a core of the yarn structure so that at least one portion of each fiber is trapped and bound within the yarn structure by portions of other fibers. The fibers can extend cyclically or in random fashion between an inner region and an outer region of the yarn, and can be twisted in subgroups along the length of the yarn structure to be locked in position therein. To produce the yarn structure having fibers which cyclically extend between the inner and outer regions, the fibers of a drafted strand of fibers from front drafting rollers are spun and passed through an oscillating guide before being wound on a spindle. To produce the yarn structure having fibers which randomly extend between the inner and outer regions, a strand of fibers is passed from a nip between first roller pair into a buckling zone between the first roller pair and a second roller pair whose rollers are rotating at a surface speed slower than the rollers of the first roller pair, and thereafter twisted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.