Method and apparatus for repairing a yarn breakage in a pair of spinning units
US5566539A · kind A · utility
Inventors
Key dates
| Filing date | Jul 21, 1993 |
| Grant date | Oct 22, 1996 |
| Priority date | — |
| Expiry date | Jul 21, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2701/31
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Two parallel spun yarns (8, 8a) are wound onto a joint cross-wound bobbin (15) in the machine. If one of the yarns breaks (e.g. 8), the bobbin (15) and the supply of slivers (32, 32a) to the drafting arrangements (11, 11a) are stopped. An end of the unbroken yarn (8a) is taken up by a suction tube (69) and the broken end of the yarn (8) is wound up on the bobbin (15). The ends of the two yarns (8, 8a) are retrieved, reversely routed through the spinning units (12, 12a), the bobbin (15) and the draw-off device (14) are restarted and, the yarns (8, 8a) are deposited in and simultaneously withdrawn from the drafting arrangements (11, 11a) for joining therein with the end of restarted slivers (32, 32a). The sliver stoppers (30, 30a), however, are restarted at different times. In this manner, repair of a breakage in two yarns being jointly wound up on a common bobbin is achieved. During a subsequent twisting of the two yarns (8, 8a) to form a thread, the joined positions of the two yarns are offset along their lengths with respect to one another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.