Developer support member, electrophotographic process cartridge and electrophotographic image forming apparatus
US8768226B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2012 |
| Grant date | Jul 1, 2014 |
| Priority date | — |
| Expiry date | Feb 22, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60C2011/0025
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A developing roller which is excellent in image quality and image durability and stably outputs a uniform image, and a process cartridge and an electrophotographic apparatus using the developing roller are provided. The developing roller has a mandrel, an elastic layer and a surface layer covering the elastic layer surface, wherein the surface layer contains a urethane resin having at least one structure of the followings A) and B) between two adjacent urethane linkages: A) a structure represented by the following structural formula (1), and at least one structure selected from the group consisting of structures represented by the following structural formulae (2) and (3), and B) a structure represented by the following structural formula (4), and the surface layer contains polyurethane resin particles of which the elastic part of the indentation work based on ISO 14577-1 is 80% or more, is obtained:
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.