Image formation apparatus
US11556077B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2022 |
| Grant date | Jan 17, 2023 |
| Priority date | — |
| Expiry date | Jan 31, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0896
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image formation apparatus includes an image-bearing member, an exposure device, an electro-conductive member, a bias application unit and a development device having a development roller and a toner supply roller. The bias application unit configured to apply biases to the toner supply roller, the development roller, and the electro-conductive member during image formation so that a first potential difference between the toner supply roller and the development roller and a second potential difference between the electro-conductive member and the development roller cause normally charged toner to travel respectively from the toner supply roller and the electro-conductive member to the development roller, and a third potential difference between the electro-conductive member and the toner supply roller causes normally charged toner to travel from the electro-conductive member to the toner supply roller. The second potential difference is larger than the first potential difference and is larger than the third potential difference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.