Method and apparatus for starting a spinning machine
US4288975A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1980 |
| Grant date | Sep 15, 1981 |
| Priority date | — |
| Expiry date | Mar 17, 2000 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01H4/44
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
According to this invention, a spinning rotor is increased in speed until it reaches a predetermined higher speed beyond a lower speed region and then decreased in speed until it falls within the lower speed region, in which a yarn ending is effected. Thereafter, the speed of the spinning rotor is increased to a normal spinning speed beyond the predetermined higher speed. During rotation of the spinning rotor at the predetermined higher speed, sufficient subatmospheric pressure is produced in the spinning rotor to stretch out the yarn end thereby to prevent the yarn end from being snarled. Also, during this higher speed rotation of the spinning rotor, sufficient fibers in the spinning rotor can be collected in a maximum diameter portion in the spinning rotor to be connected with the snarl-free yarn end in a favorable condition. The period of time, during which the speed of the spinning rotor is decreased from the predetermined higher speed and falls within the lower speed region, is relatively short being in the order of a few or several seconds. Therefore, it will be understood that there is no fear that both the yarn end and the remaining fibers are restored to their initial stat…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.