Yarn scanning process and yarn unwinding sensor
US6068028A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | May 18, 1998 |
| Grant date | May 30, 2000 |
| Priority date | — |
| Expiry date | May 18, 2018 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD03D47/34
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In a method of scanning, with the aid of a sensor device, a yarn of a predetermined length which is intermittently withdrawn from a winding reservoir provided on the storage drum of a yarn feeding device for weaving machines, the yarn pulse acceptance for exclusively at least one first yarn pulse is changed at an increasing yarn speed and/or upon generation of at least one first or each winding signal to a yarn pulse acceptance for further faster yarn pulses and non-acceptance of interference pulses that are slower than the second yarn pulses. A yarn withdrawal sensor which is suited for said method is characterized in that a filtering device is provided with two different selective filtering modes that differ from each other by their acceptance of yarn pulses generated at different yarn withdrawal speeds, and that the filtering device is switchable at an increasing yarn withdrawal speed from a first filtering mode to at least one further filtering mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.