Developing apparatus, electrophotographic process cartridge, and electrophotographic image forming apparatus
US9952532B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2017 |
| Grant date | Apr 24, 2018 |
| Priority date | — |
| Expiry date | Jul 21, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0818
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The developing apparatus includes: a developing roller rotatable in a first rotation direction; and a developer regulating member, wherein the developing roller includes: a substrate; an electro-conductive elastic layer on the substrate; and insulating domains on the electro-conductive elastic layer, wherein the electro-conductive elastic layer has a certain Martens hardness, the developing roller has a surface including surfaces of the insulating domains and a surface of the electro-conductive elastic layer, which is uncovered with the insulating domains at a certain area ratio, wherein the developer regulating member comprises: an abutting portion which is in contact with the surface of the developing roller, and a certain projection portion extending to an upstream side from the abutting portion in the first rotation direction, the developing apparatus has a certain gap between a side of the projection portion facing to the developing roller, and the surface of the developing roller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.