Electrostatographic apparatus comprising improved drum cleaning means
US4154522A · kind A · utility
17Cited by
4References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 15, 1977 |
| Grant date | May 15, 1979 |
| Priority date | — |
| Expiry date | Aug 15, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A scraper blade or roller engages the surface of a photoconductive drum and causes residual toner substance to pile up. The pile of residual toner is then released and carried by the drum to a position where it is removed therefrom by gravity, another scraper blade or a magnetic brush which bifunctions as a developing means. A groove may be formed in the drum surface into which the piled-up residual toner substance drops to be carried away for removal. A bias electrode or electromagnet which attracts the toner substance may replace the groove.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.