Process and device for measuring the twist of a textile yarn
US5210594A · kind A · utility
2Cited by
2References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1991 |
| Grant date | May 11, 1993 |
| Priority date | — |
| Expiry date | Oct 15, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/365
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention concerns a process and a device for optically measuring the twist of a textile yarn. The device comprises means (20) for lighting up the yarn (10) by a beam of light (11) to form a spot of light (12) which corresponds to the light diffracted by the surface fibres of the compact core of this yarn. The energy repartition of this spot is then analyzed by means such as a rotary analyzer (27) to define the angle of twist by determination of the maximum of energy in the said spot (12).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.