Method of maintaining the correct conditions of an electrophotographically duplicated image
US4215930A · kind A · utility
49Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1978 |
| Grant date | Aug 5, 1980 |
| Priority date | — |
| Expiry date | Feb 22, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/065
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of maintaining the correct conditions of an electrophotographically duplicated image, which uses a reference plate having at least a dark-tone area and a light-tone area and in which signals associated with the reference plate are detected and synthesized to control the duplicating process conditions such as developing bias potential, charge, exposure and of the optical system so that an optimum image may be produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.