Development apparatus
US4382420A · kind A · utility
28Cited by
4References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1981 |
| Grant date | May 10, 1983 |
| Priority date | — |
| Expiry date | Jan 28, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0641
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus for developing a latent electrostatic image formed on a photoconductive recording material in a dry type electrophotographic copying machine typically employing a one-component type developer comprises a conductive electrode held in contact with the developer. The electrode is connected to a power source through a switching device and serves to charge the developer to a predetermined polarity with a predetermined potential before the latent image is developed. In this way, the latent image can be developed selectively as either a normal image or a reverse image quite easily.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.