Developing roller
US6035172A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 1998 |
| Grant date | Mar 7, 2000 |
| Priority date | — |
| Expiry date | Oct 23, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0861
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is a developing roller to be employed in a developing device which is incorporated in electrophotographic apparatus such as printers, duplicators, receivers for facsimiles or the like, and in which toner carried on the surface of the roller being or not being kept in contact with a photoreceptor is transferred at least to the photoreceptor. The developing roller is characterized in that an elastic conductive layer is formed around the conductive shaft of the roller, that the outer surface of the elastic conductive layer is covered with a surface layer, and that the surface layer is formed from a resin composition of which the contact angle with a drop of a liquid consisting essentially of a component similar to the resin component constituting the toner to be used in the developing device is not smaller than 35.degree.. In the developing device, toner filming occurs little around the developing roller, and the initial density of the images formed is good. In addition, toner cracking occurs little in the developing device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.