Image forming apparatus with a cleaning operation to improve image quality
US7945188B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 2006 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Dec 11, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0225
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes an image bearing member, a charging member, a toner image forming device for forming an image on the image bearing member, and an intermediary transfer member for carrying a toner image. A cleaning member removes toner remaining on the image bearing member, a speed switching device selectively set a speed of the recording material, and an intermediary transfer member speed switching device switches a rotational speed of the intermediary transfer member after the toner image is transferred. A charging control device render off a DC voltage applied to the charging member after transfer of the toner image and while the intermediary transfer member is carrying the toner image. A charging member cleaning control devices permits, when a signal for starting image formation is inputted, a cleaning operation for discharging toner deposited on the charging member to the image bearing member before starting the image formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.