Charging member, charging device, process cartridge, and image forming apparatus
US10824087B2 · kind B2 · utility
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1References
10Claims
0Family size
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Key dates
| Filing date | Jul 22, 2019 |
| Grant date | Nov 3, 2020 |
| Priority date | — |
| Expiry date | Jul 22, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/1835
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A charging member includes a conductive substrate, an elastic layer disposed on the conductive substrate, and a surface layer disposed on the elastic layer. Regarding the surface of the surface layer, in the axial direction, the ratio of the mean spacing of profile irregularities Sm to the ten-point mean roughness Rz and the reduced peak height Spk respectively satisfy 15≤Sm/Rz≤35 and Spk≤5 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.