Developing device and image forming apparatus including the same
US11782357B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2022 |
| Grant date | Oct 10, 2023 |
| Priority date | — |
| Expiry date | Jul 7, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/09
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing device includes a developing container storing a two-component developer, a developer carrying member, and a regulation member. The developer carrying member includes a developing sleeve, and a magnet having a regulation pole opposite the regulation member and a main pole opposite the image carrying member. The regulation member is arranged downstream of the position at which the vertical magnetic force of the regulation pole is 0 [mT] but upstream of a position at which the vertical and horizontal magnetic forces of the regulation pole are equal. Let the horizontal magnetic force gradient at the position at which the horizontal magnetic force of the main pole is 0 [mT] be A and the horizontal magnetic force gradient at the upstream-side surface of the regulation member along the rotation direction of the developing sleeve be B, then |A|>2.45 and |B|<1.30.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.