Process for production of crimpable chemical yarns
US4247503A · kind A · utility
4Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1978 |
| Grant date | Jan 27, 1981 |
| Priority date | — |
| Expiry date | Nov 22, 1998 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01D5/22
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The process of an apparatus for asymmetrically heat treating chemical yarns by applying different temperatures on either side of a plane passing through two generatrices of a peripheral surface of each orifice through which the yarns are extruded during production. One side of the plane is preferably at a temperature slightly higher than the melting point of the material and the other side of the plane is preferably at a temperature slightly lower than the decomposition point of the material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.