Method and apparatus for producing plied yarn and product thereof
US4034544A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 11, 1974 |
| Grant date | Jul 12, 1977 |
| Priority date | — |
| Expiry date | Jun 11, 1994 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD10B2503/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for producing either bulked continuous filament or spun staple yarn in one continuous operation are disclosed. In the method, a first single end of either continuous filament or spun staple yarn is ballooned about and plied with a like second single end of yarn while both are under tension and advancing at a common linear speed. A higher tension is utilized during the plying operation. The plied yarn is then subjected to heat while the tension is relaxed, followed by a cooling and drying stage, to enable the yarn to be twist-set in a bulked condition, with the component single ends substantially free of any twist memory. This abstract is not to be taken either as a complete exposition or as a limitation of the present invention, however, the full nature and extent of the invention being discernible only by reference to and from the entire disclosure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.