Procedure for re-equipping and simultaneous modernization of an open end rotor spinning machine
US6079195A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Apr 22, 1999 |
| Grant date | Jun 27, 2000 |
| Priority date | — |
| Expiry date | Apr 22, 2019 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01H4/50
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A procedure is described in which an open-end rotor spinning machine already in operation can be modernized by means of re-equipping it with new parts. This machine comprises device means for interrupting the spinning process at a spinning station for the purpose of a doffing operation. The machine comprises a doffing arrangement which is movable relative to the spinning stations, which doffing arrangement comprises devices for exchanging a full bobbin for an empty yarn-winding tube. The machine comprises further at least one piecing arrangement movable in relation to the spinning stations, which is designed to restart spinning at the spinning station with a starting winding already connected to the yarn-winding tube. It is an object of the modernization that the piecing arrangement is replaced with a new piecing arrangement, which is designed to restart spinning with a starting yarn which is not connected to the yarn-winding tube, and subsequently to attach a newly spun yarn to the yarn-winding tube. In the case of the new piecing arrangement any piecing point of the yarn after a doffing operation onto the bobbin is omitted. This results in an increase in bobbin quality. The pieci…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.