Electrophotographic apparatus controlling image quality according to condition of deterioration
US4970557A · kind A · utility
32Cited by
9References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1988 |
| Grant date | Nov 13, 1990 |
| Priority date | — |
| Expiry date | Aug 29, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00075
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Electrophotographic apparatus according to this invention are controlled in different ways such that quality of produced images is not affected by deterioration of the developing agent or the condition of the photoreceptor. A timer may be provided to detect the duration of a rest period to adjust the speed of development accordingly as well as by the number of copies produced. Similar control may be effected by measuring the surface voltage of the photoreceptor by a voltage detector and by adjusting the output level of the principal charger used for uniformly charging the photoreceptor prior to a development process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.