Image forming apparatus
US12321108B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 2022 |
| Grant date | Jun 3, 2025 |
| Priority date | — |
| Expiry date | Jul 1, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/5008
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes an image bearing member, a developer bearing member, a drive unit for driving the image bearing member and the developer bearing member in varied peripheral speeds, a control unit, a developing voltage application unit, a supply member for supplying a developer to the developer bearing member, and a supply member voltage application unit. The control unit executes a first image forming mode in which a rotational peripheral speed ratio between surface movement speeds of the developer bearing member and the image bearing member is not greater than 1 and a second image forming mode in which the rotational peripheral speed ratio is greater than 1, and the control unit controls the drive unit so that a difference between developing voltage and supply voltage is greater in the second image forming mode than that in the first image forming mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.