Developing apparatus, process cartridge and electrophotographic image forming apparatus
US9989883B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2017 |
| Grant date | Jun 5, 2018 |
| Priority date | — |
| Expiry date | Jul 14, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0872
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The developing apparatus includes a developer carrying roller rotatable in a first rotating direction, and a developer regulating member which regulates a thickness of a developer layer carried on the developer carrying roller, wherein at least a part of the developer regulating member is in pressure contact with a surface of the developer carrying roller to form an abutting portion between the developer carrying roller and the developer regulating member, the abutting portion having an abutting width W in a circumferential direction of the developer carrying member of 1.0 to 5.0 mm, wherein in the abutting portion, an abutting pressure has a maximum value in a first area, the first area having a width of 20% or less of the abutting width W from an upstream edge of the abutting portion in the rotating direction, and wherein an abutting pressure in a second area is 0.08 to 0.18 MPa.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.