Drum cartridge including first memory having first electrical contact surface and second memory having second electrical contact surface and process cartridge including developing cartridge and the drum cartridge
US12379690B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2023 |
| Grant date | Aug 5, 2025 |
| Priority date | — |
| Expiry date | Dec 6, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/1885
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A drum cartridge includes: a drum frame; a photosensitive drum; a first memory; and second memory. A developing cartridge including a developing roller is attachable to the drum frame. The photosensitive drum is rotatable about a first axis extending in a first direction. The photosensitive drum is configured to contact the developing roller in a state where the developing cartridge is attached to the drum frame. The first memory has a first electrical contact surface. The first memory stores therein information related to the drum cartridge. The second memory has a second electrical contact surface different from the first electrical contact surface. The second memory stores therein information related to the developing cartridge. The first electrical contact surface and the second electrical contact surface are positioned at an outer surface of the drum frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.