Patent · US Expired

Method and apparatus for determining the structure of yarns in the region of their surface

US5521395A · kind A · utility

2Cited by

3References

9Claims

0Family size

Assignee

Zellweger Luwa AG · CH

Inventors

Rolf Hensel · Jona, CH
Hans Wampfler · Zürich, CH
Peter Seitz · Munich, DE

Key dates

Filing date	Apr 4, 1994
Grant date	May 28, 1996
Priority date	—
Expiry date	Apr 4, 2014

Classification

Technology area (CPC G)Physics
CPC primaryG01N33/365
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The surface of a yarn (G) is imaged on a sensor (7) having a plurality of sensor elements of differing structural arrangement. The signals of the individual sensor elements are compared with one another, and the structure of the examined yarn surface is determined on the basis of correspondence with the appropriate sensor element. The structure to be examined is formed both by the actual yarn surface and by the yarn edge, including projecting fibers and possible impurities, such as foreign fibers, included in the yarn.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.