Developing apparatus with variable developing bias voltage
US4912513A · kind A · utility
7Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1988 |
| Grant date | Mar 27, 1990 |
| Priority date | — |
| Expiry date | Jul 1, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0907
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A copying apparatus in which a developing bias voltage to be applied to a developing sleeve by a power source is changed to adjust the density of a reproduced image, while the electric potential difference between the developing sleeve and a toner supply roller is kept constant. As a result, a density of toner on the developing sleeve is kept constant. Therefore, a development is effected under the condition in which the density of the toner is constant, so that the tone of the image of an original document is reproduced in a desired density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.