Developing unit for electrophotography
US3980049A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1976 |
| Grant date | Sep 14, 1976 |
| Priority date | — |
| Expiry date | Jan 28, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/065
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing unit for use with electrophotographic copying apparatus which uses a developing electrode for preventing unfavorable results such as edge effect, missing of fine lines, etc. A pair of conductor plates are maintained one behind the other and face a photosensitive surface of a photoreceptor carrying an electrostatic latent image, the conductor plate remote from the surface being connected to the ground directly or through a constant voltage source, with respective portions of the developer used filling the spaces between the plates and photoreceptor which may constitute a voltage divider, thus maintaining the function of the divider irrespective of variations in the resistances of such filling fractions of the developer with aging, environmental factors, etc. thus obtained potential on the other conductor plate provides a stable index of the potential to be applied to the developing electrode. The latter conductor plate itself may be consistent with the developing electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.