Electrophotographic apparatus, process cartridge and cartridge set
US11061342B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2020 |
| Grant date | Jul 13, 2021 |
| Priority date | — |
| Expiry date | Oct 15, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0233
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrophotographic apparatus comprising an electrophotographic photosensitive member, a charging device, and a developing device, wherein the charging device comprises a conductive member arranged to be capable of contacting the electrophotographic photosensitive member, a conductive layer on the conductive member outer surface comprises a matrix and a plurality of domains dispersed in the matrix, at least some of the domains are exposed at the conductive member outer surface, the matrix has a volume resistivity of larger than 1.00×1012 Ω·cm and is 1.0×105 times or more one of the domains, the developing device comprises the toner comprising a toner particle, fine particles A and B, the fine particle A has a volume resistivity of 1.0×103 to 1.0×1010 Ω·cm, and the fine particle B is silica fine particle and having a volume resistivity of 1.0×1011 to 1.0×1017 Ω·cm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.