Method and apparatus for electrically biasing developing electrode of electrophotography device
US4129375A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1977 |
| Grant date | Dec 12, 1978 |
| Priority date | — |
| Expiry date | Jul 11, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/065
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photoconductive member utilized in a wet-type electrophotographic device is charged and radiated with a light image to produce an electrostatic image. Sensing electrode automatically sense through the developing solution the remaining potential in a portion of the electrostatic image corresponding to a background area of the original document scanned to produce the light image. In one embodiment the area is a white reference document disposed adjacent to the original document. In another embodiment a reference document is not provided and a plurality of portions of the electrostatic image are sensed. The lowest value of the sensed potential is utilized. Computing circuits compute and apply the biasing voltage to the developing electrode as a predetermined function of the sensed potential.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.