Image forming apparatus having improved developer limiting member
US6070037A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1999 |
| Grant date | May 30, 2000 |
| Priority date | — |
| Expiry date | Apr 20, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0177
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes an image bearing member, a developing device to develop a latent image on a surface of the image bearing member, a developer bearing member including a magnet therein, which bears developer on a surface thereof by a magnetic force of the magnet and carries the developer towards a developing position facing the image bearing member by being rotated, a limiting member that is placed facing the developer bearing member so as to limit a thickness of a layer of the developer borne on the developer bearing member, and a developing device casing. The limiting member is provided with a magnetizable member having a protruding portion protruding toward the developer bearing member at a part that does not face the magnet and a recessed part at a part that faces the magnet, in which the magnetizable member is disposed upstream of the limiting member in a developer conveying direction of the developer bearing member and is placed such that the protruding portions are nearer to the surface of the developing roller than the limiting member and the recessed part is more distant from the surface of the developing roller than the limiting member. The limiting memb…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.