Inspection of elongated material
US4232336A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 18, 1978 |
| Grant date | Nov 4, 1980 |
| Priority date | — |
| Expiry date | Sep 18, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/188
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus and method are described for inspecting elongated material such as strands, sheets, bundles or webs for the presence of surface irregularities, count of irregularities within a given length and angle of irregularities such as in the case of crimped fiber. A light source is used to form light areas and shadowed areas of the elongated material. A television camera produces a video signal of the light and shadowed areas and such signal is electronically analyzed with respect to number of alternating light and dark areas within a given length, and the relative widths of such light and dark areas, from which information can be obtained to confirm presence of irregularities, count or frequency, and angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.