Spinning box for an open-end spinning machine
US6003295A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 14, 1998 |
| Grant date | Dec 21, 1999 |
| Priority date | — |
| Expiry date | May 14, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K15/1823
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In order that stray fibers do not settle in the rotor during the spinning start process at the spinning box of a rotor spinning machine, an openable air valve is provided for initially cleaned the rotor by delivering an air current into the rotor either by drawing ambient air through the valve as a consequence of the spinning vacuum or by blowing in compressed air through the valve. As an alternative to known spring-loaded ball valves pose the danger that the spring ceases to perform due to deposits of dust and fibers, the present invention provides a magnet arranged in association with the valve seat in the area of its valve opening to attract the ball, which consists of a magnetizable material, and thereby hold the ball in closed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.