Charging member, charging device, process cartridge, and image forming apparatus
US10429758B1 · kind B1 · utility
0Cited by
1References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2018 |
| Grant date | Oct 1, 2019 |
| Priority date | — |
| Expiry date | Aug 7, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/087
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A height of convexities in a 0.7-mm-square area of a surface of the charging member is measured at five or more different positions in an axial direction and calculated. A height of a position where the charging member occupies 0.01 area % from a highest portion is defined as a reference height. An average proportion of areas occupied by the charging member at a position 1.7 μm lower than the reference height is 2 area % or less relative to 100 area % of the 0.7-mm-square area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.