Charger, image forming apparatus, and charge control method
US7835655B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2007 |
| Grant date | Nov 16, 2010 |
| Priority date | — |
| Expiry date | Mar 24, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0216
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A charger includes: a first charging member that contacts an image carrier and a second charging member that contacts the image carrier downstream from the first charging member. At the time of image formation, a voltage higher than the discharge start voltage of the first charging member is applied to the first charging member and a voltage lower than the discharge start voltage of the second charging member and lower than the voltage applied to the first charging member is applied to the second charging member, and at the time when an image is not formed, a voltage lower than the discharge start voltage of the first charging member is applied to the first charging member and a voltage higher than the discharge start voltage of the second charging member and higher than the voltage applied to the first charging member is applied to the second charging member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.