Process and apparatus for making a yarn
US4672800A · kind A · utility
Inventor
Key dates
| Filing date | May 30, 1986 |
| Grant date | Jun 16, 1987 |
| Priority date | — |
| Expiry date | May 30, 2006 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01H1/11
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In the making of a yarn, a stream of drawn core fibers (17a) is twisted in a triangular twisting space (4) between two juxtaposed, closely spaced apart twisting drums (1, 2), which are rotated in the same sense, and covering fibers are wound about said stream of fibers in said twisting space. To make said yarn from a single roving (17), the drawn roving (17) is fed to the twisting space (4) on the circumference of a feed roller (8), to which a vacuum is applied, the roving which has been fed on said feed roller is divided into two streams of fibers (17a, 17b) before reaching the twisting space (4), one (17a) of said streams of fibers is intended to constitute the core of the yarn to be made and is moved on the feed roller (8) as far as to the twisting space (4), and the other (17b) stream of fibers consists of the covering fibers and is detached from the feed roller (8 ) and its fibers are caused to fly freely into the twisting space (4).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.