Yarn piecing method for yarn spinning machine
US5142856A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1990 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Nov 8, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2701/31
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A yarn piecing method for a yarn spinning machine including a yarn processing portion comprising a drafting unit, a yarn forming unit, and a yarn winding unit and a yarn piecing unit for piecing an end of a yarn spun from the yarn forming unit with an end of a yarn withdrawn from a yarn package, the method including the steps of guiding yarns to be pieced to each other to a yarn sensor before a yarn piecing operation is carried out, detecting whether any yarn defect exists on one or more of the yarns to be pieced, and determining to carry out the yarn piecing operation when no yarn defect is detected and not to carry it out when a yarn defect is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.