Method and apparatus for detecting the deposition of an adhesive on a travelling web
US4845374A · kind A · utility
48Cited by
13References
52Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1988 |
| Grant date | Jul 4, 1989 |
| Priority date | — |
| Expiry date | Feb 11, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/8427
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus is disclosed that detects the specular reflections from the surface of a travelling web to determine if a material is coated on the web. The web is illuminated with diffuse light and the reflected light is received by a detector which determines the presence and width of the coated material based on the specular reflections from the coated surface of the travelling web.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.