Image forming apparatus
US10955767B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 24, 2019 |
| Grant date | Mar 23, 2021 |
| Priority date | — |
| Expiry date | Oct 24, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0942
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In an image forming apparatus, a shortest distance at which a developer container is closest to an image bearing member and which is disposed downstream of a first magnetic pole and upstream of second magnetic pole of a magnet fixed within a developer bearing member is 2.5 mm or less, and a position at which a magnetic flux density in a normal direction of the developer bearing member is zeroed and which is disposed downstream of the first magnetic pole and upstream of the second magnetic pole in the rotation direction of the developer bearing member on the developer bearing member is positioned upstream of the position at which the developer container is closest to the image bearing member and which is disposed downstream of the first magnetic pole and upstream of the second magnetic pole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.