Method for monitoring weft yarn run/stop conditions
US6708731B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 13, 2002 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Jun 13, 2022 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD03D51/34
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of monitoring the weft yarn run/stop conditions during each insertion cycle in a shuttle-less weaving machine like a rapier or projectile weaving machine by means of an electronic weft yarn feeler generating run output signals representing said weft yarn run condition, said weft yarn feeler including means to adjust the working sensitivity level, comprises that the present working sensitivity level effectively used for confirming run output signals continuously and automatically is adjusted during operation of the weaving machine to oscillate about an optimum and safe working sensitivity level by observing within a predetermined restricted observation interval of each insertion cycle the signal stability at an observation sensitivity level lower than the present working sensitivity level and by lowering or raising both said present working and observation sensitivity levels in dependence from output signal stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.