Process cartridge and image forming apparatus
US11144007B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2019 |
| Grant date | Oct 12, 2021 |
| Priority date | — |
| Expiry date | Nov 12, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/754
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process cartridge using an image forming apparatus, including a rotatable image bearing member having a circumferential surface; a developing unit configured to supply a developing agent to the image bearing member; and a cleaning member that cleans the circumferential surface, wherein the developing agent contains a toner including toner particles and a metal soap, the image bearing member includes a plurality of grooves formed on the circumferential surface to extend in a circumferential direction of the circumferential surface and to be arranged side by side in a rotation axis direction, and the plurality of grooves and portions between the grooves form concave-convex portions on the circumferential surface. The circumferential surface of the image bearing member had surface roughness Rz of 0<Rz≤0.70 μm and average interval Sm between concave-convex portions on the circumferential surface of 0<Sm≤70.0 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.