Device for removing defective developer agent from a developing unit of an image formation apparatus
US4962408A · kind A · utility
4Cited by
12References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1988 |
| Grant date | Oct 9, 1990 |
| Priority date | — |
| Expiry date | Apr 22, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0887
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image formation apparatus having a cleaning process for removing defective toner from the developing unit during a non-image formation rotation of the photoreceptor drum. The image formation apparatus includes a reverse polarity charger for charging the photoreceptor drum to an opposite polarity from the polarity that is used for forming an electrostatic latent image. The reverse polarity charger allows defective toner to be removed from the surface of the photoreceptor during a warming-up process of the apparatus or after a predetermined number of image forming processes have been performed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.