Image forming apparatus using cleaner-less system
US8315541B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 17, 2009 |
| Grant date | Nov 20, 2012 |
| Priority date | — |
| Expiry date | Sep 17, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/1614
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes a rotatable photosensitive member; a charging device for electrically charging the photosensitive member; a developing device for developing with toner an electrostatic latent image formed on the photosensitive member electrically charged by the charging device; a transfer device for transferring a toner image from the photosensitive member onto an image-receiving member; and an auxiliary charging device for electrically charging untransferred toner on the photosensitive member to a normal charge polarity before the photosensitive member is electrically charged by the charging device; wherein effective widths WPM, WCD, WDD, WTD, and WACD of the photosensitive member, the charging device, the developing device, the transfer device, and the auxiliary charging device satisfy:WPM>WCD>WACD≧WTD>WDD.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.