Drum cleaning process and apparatus for electrophotography
US4201465A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1978 |
| Grant date | May 6, 1980 |
| Priority date | — |
| Expiry date | Jun 27, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/0005
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Charging, imaging, developing, transfer and cleaning units are operatively arranged about the circumference of a rotary photoconductive drum, the developing unit comprising a magnetic brush. A discharge unit is disposed between the transfer unit and the cleaning unit and comprises a light source and a corona discharge element to simultaneously illuminate the drum causing photoconduction and expose the drum to an electric field thereby neutralizing any residual charge on the drum and residual toner particles remaining on the drum after the transfer operation. The residual toner is subsequently removed by the magnetic brush of the developing unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.