Developing apparatus featuring a developer carrying member with an elastic surface layer
US7233758B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2004 |
| Grant date | Jun 19, 2007 |
| Priority date | — |
| Expiry date | May 27, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/0837
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing device includes a rotatable developer carrying member for carrying a developer to develop an electrostatic image formed on an image bearing member with the developer; non-rotatable magnetic field generating means, disposed inside the developer carrying member, for magnetically attracting the developer on the developer carrying member; a regulating member for regulating an amount of the developer carried on the developer carrying member, wherein the developer carrying member is provided with a surface elastic layer, and the developer carrying member is press-contacted to the image bearing member, and wherein, the developer is an one component magnetic toner having an average circularity not less than 0.965, and an amount of the developer per unit area of the developer regulated by the regulating member is 5-14 g/m2, and an amount of electric charge thereof is 10-50 μC/g.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.