Image forming apparatus, process cartridge, and developing apparatus including developing roller
US10365587B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2018 |
| Grant date | Jul 30, 2019 |
| Priority date | — |
| Expiry date | Sep 26, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0898
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing apparatus includes: a developing roller; a frame configured to support the developing roller at each of two end portions of the developing roller in a longitudinal direction of the developing roller; and a sealing member configured to seal a space between the frame and each of the two end portions of the developing roller. A first lubricant having an average particle size smaller than a predetermined surface roughness Ra is applied to a first region that is located at each end portion of the developing roller in the longitudinal direction and is in contact with the sealing member. A second lubricant having an average particle size larger than the surface roughness Ra is applied to a second region that is located on an inner side of the first region in the longitudinal direction and is separated from the sealing member and has the surface roughness Ra.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.