Process control by creating and sensing half-tone test patches
US4999673A · kind A · utility
45Cited by
8References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 10, 1989 |
| Grant date | Mar 12, 1991 |
| Priority date | — |
| Expiry date | May 10, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00042
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus which controls the parameters in a processing station of an electrophotographic printing machine having a photoconductive member. A test patch having a half tone image is recorded on the photoconductive member. The test patch is developed with developer material to form a developed half tone image on the photoconductive member. In response to the average density of the developed half tone image on the photoconductive member, the parameters of the processing station are regulated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.