Electrophotographic apparatus including an electrostatic separation device
US4341457A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1980 |
| Grant date | Jul 27, 1982 |
| Priority date | — |
| Expiry date | Sep 8, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/1645
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A transfer corona current is always maintained substantially constant independently of the surface potential of a photosensitive medium and environmental conditions, to thereby prevent the amount of charge on the back side of a transfer medium from fluctuating in accordance with said surface potential and environmental conditions. In addition, a separation corona current is maintained substantially constant to thereby further improve the stability of electrostatic separation. The transfer corona current is below a critical current value whereat the corona charge passes through the transfer medium, and the separation corona imparts to the back side of the transfer medium an amount of charge substantially equal to the amount of charge provided by the transfer corona.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.