Background detection and compensation
US5822662A · kind A · utility
3Cited by
10References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1997 |
| Grant date | Oct 13, 1998 |
| Priority date | — |
| Expiry date | Apr 9, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/5041
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method adjusting toner concentration in a printing machine by first reading a first clean imaging surface reflectance value from a segment of the imaging surface with the developer in an off mode and storing the reflectance value as a reference. A second clean imaging surface reflectance value from the same segment of the imaging surface is then read with the developer in an on mode. The first clean imaging surface reflectance value is compared to the second clean imaging surface reflectance value and the toner dispenser is controlled in response to the difference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.