Detection of faults in sheet and like materials
US4338032A · kind A · utility
6Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1980 |
| Grant date | Jul 6, 1982 |
| Priority date | — |
| Expiry date | Jan 31, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2551/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Faults can be detected in sheet material, particularly in tufted fabric during manufacture of same, by scanning a surface of the material with an electrical scanning device which produces an electrical output representative of characteristics of the scanned surface. The electrical output is monitored to detect deviations from a norm representative of a fault condition. The scanning may be effected with a scanning device, comprising for example a light receiver which picks up reflected or transmitted light from the material, which is moved across the sheet transversely to the direction of advancement of the sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.