Surface reflectivity discriminating device
US6825484B2 · kind B2 · utility
5Cited by
12References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 10, 2002 |
| Grant date | Nov 30, 2004 |
| Priority date | — |
| Expiry date | Jun 26, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/556
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus and method for discriminating between plate and interleave paper in a CTP device having a cassette with printing plates and interleave paper. The device uses a light source for illuminating the topmost object in the cassette, a first optical sensor for receiving direct light reflected from the topmost object, a second optical sensor for receiving dispersed light reflected from the topmost object, means for comparing light received by the second optical sensor with light received by the first optical sensor, and means for determining the topmost object type based on the comparison.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.