Developer carrying member for carrying developer, apparatus unit detachably mountable on the main assembly of image forming apparatus, and image-forming apparatus
US6122473A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1998 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Mar 31, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0614
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developer carrying member for carrying a developer is includes a substrate and a resin coat layer which is formed on the surface of the substrate and contains a binder resin and a conductive fine powder. The binder resin is composed of a copolymer having a monomeric unit of a methyl methacrylate monomer (M) and a monomeric unit of a nitrogen-containing vinyl monomer (N). A copolymerization molar ratio of the methyl methacrylate monomer (M) to the nitrogen-containing vinyl monomer (N) in the copolymer fulfills the following condition: M:N=4:1 to 999:1. The binder resin has a weight-average molecular weight (Mw) of from 3,000 to 50,000.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.