Charging roller, cartridge, image forming apparatus and manufacturing method of the charging roller
US10268132B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2018 |
| Grant date | Apr 23, 2019 |
| Priority date | — |
| Expiry date | Jun 11, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/021
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A charging roller includes a surface layer containing first and second surface particles and satisfying the following: 6.0 (μm)≤Rz≤18.8 (μm), i where Rz is a ten-point average roughness (μm) of a charging roller surface, 7 (μm)≤d≤20 (μm), ii where d is a thickness (μm) of the surface layer, 9.8 (μm)≤D1≤15.8 (μm) and 2.8 (μm)≤D2≤5.2 (μm), iii where D1 and D2 are average particle size (μm) of the first surface particles, and the second surface particles, respectively, 3.0≤D1/D2≤5.6, and iv0.10≤M1/(M1+M2)≤0.32, v where M1 is a total weight (mg) of the first surface particles per unit area of the charging roller surface, and M2 is a total weight (mg) of the second surface particles per unit area of the charging roller surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.