Method and apparatus for treating yarn
US4030169A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1976 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Feb 11, 1996 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD02G1/20
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Method of treating synthetic threads, particularly filament or foil threads comprises heating the threads up to the center of their cross-section, crimping the heated thread, forming the crimped threads into a wadding, heating and compressing the wadding to reduce its volume and thereafter cooling the compressed wadding. An apparatus for treating the yarn includes a continuous heating chamber which is arranged adjacent a cooling chamber. An apparatus is provided for feeding the yarn to be treated toward the heating chamber and for crimping the yarn preferably while it is heated and perhaps also stretched. Crimping may be carried on by directing the thread under a fluid force against a screen, by passing the thread between a pair of rollers which have crimping means or by a combination of the two and, in addition, stretching means may be provided to stretch the thread. The device is also provided to collect the yarn in wads as it is crimped and to force it through a narrowing path so as to compress it as it is being fed through a heating chamber. The compressed wadding is thereafter fed through a cooling chamber. Wadding is advantageously moved through the heating chamber around a d…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.