Ghost-image preventing apparatus for a developing roller
US5937236A · kind A · utility
5Cited by
25References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 11, 1997 |
| Grant date | Aug 10, 1999 |
| Priority date | — |
| Expiry date | Sep 11, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0898
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The ghost-image preventing apparatus including a grounded seal installed on a developing frame that prevents toner from flowing to the developing roller and neutralizes the charge of toner remaining on the developing roller. Another embodiment induces a voltage across the seal of the same magnitude as, but having opposite polarity to, the charge of the developing roller to neutralize the electric charge of the toner remaining on the surface of the developing roller after an electrostatic latent image or a photosensitive drum is developed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.