Image forming apparatus
US8010005B2 · kind B2 · utility
4Cited by
1References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2009 |
| Grant date | Aug 30, 2011 |
| Priority date | — |
| Expiry date | Mar 13, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0129
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes a transfer device, a voltage applicator, a current sensor, and a discharge detector. The transfer device transfers a toner image from one surface to another by developing an electrical field across a transfer gap when provided with a transfer bias. The voltage applicator applies a stepped test voltage to the transfer device. The current sensor senses a current flowing to the transfer device during application of the test voltage the discharge detector detects an electrical discharge occurring in the transfer gap based on a rate of increase of the sensed current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.