Image forming apparatus
US7639976B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 16, 2007 |
| Grant date | Dec 29, 2009 |
| Priority date | — |
| Expiry date | Feb 22, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0164
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes an image carrier that carries toner images, and an intermediate transfer member onto which the toner images are primarily transferred, sequentially from a first toner image, from the image carrier. A primary transfer bias applied upon primary transfer of the first toner image is higher than a primary transfer bias applied upon primary transfer of other toner images. The intermediate transfer member has a surface potential attenuation ratio such that residual potential of the intermediate transfer member applied with a voltage of 500 volts becomes equal to or lower than 250 volts after five seconds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.