Charging member, process cartridge, and image forming apparatus
US9817328B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2016 |
| Grant date | Nov 14, 2017 |
| Priority date | — |
| Expiry date | Jul 25, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/021
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A charging member includes a support member, a conductive elastic layer disposed on the support member, and a front surface layer disposed on the conductive elastic layer. Irregularities with a cycle of shorter than 0.1 mm and irregularities with a cycle of 0.1 mm or longer are distributed on an entirety of an outer circumferential surface of the charging member, and satisfy the following conditions of (1) and (2): (1) the irregularities with the cycle of shorter than 0.1 mm have an average height of greater than 0 μm and 4 μm or less; and (2) the irregularities with the cycle of 0.1 mm or longer have an average height of from 5 μm to 30 μm. A half-value width of a maximum frequency value of height distribution on the outer circumferential surface is from 1 μm to 3 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.