Method of and apparatus for controlling the yarn spinning-in in the open-end spinning process
US4821502A · kind A · utility
Inventors
Key dates
| Filing date | May 12, 1987 |
| Grant date | Apr 18, 1989 |
| Priority date | — |
| Expiry date | May 12, 2007 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01H4/50
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process of automatic yarn spinning-in in the spinning unit of an open-end rotor spinning machine of an automatic service device provided with a control unit having a programmable microprocessor control system for controlling the spinning-in cycle and the automatic adjustment of spinning-in parameters modified according to successive verifying tests which are performed by the automatic service device which is either arranged in the individual spinning units, or as a unit traveling along the machine. By successive tests, spinning-in parameters are adjusted for an interval for yarn return to the spinning rotor as well as for determining the start of fiber feeding. The spinning-in parameters can be corrected by further verifying tests in spinning units with various dynamic characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.