Determining lifetime of a developing apparatus in an image forming apparatus
US11106169B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 2020 |
| Grant date | Aug 31, 2021 |
| Priority date | — |
| Expiry date | Jan 3, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2221/1823
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus having a first mode and a second mode with respectively different rotational peripheral velocity ratios of a developer bearing member, stores a first lifetime threshold value of a developing apparatus corresponding to the first mode and a second lifetime threshold value of the developing apparatus corresponding to the second mode, updates a lifetime determination value of a developing apparatus on the basis of drive amount information when the developer bearing member operates in the first mode and second modes, performs a first determination related to a lifetime in the first mode on the basis of the first lifetime threshold value and the lifetime determination value, performs a second determination related to a lifetime in the second mode on the basis of the second lifetime threshold value and the lifetime determination value, and makes a notification on the basis of determination results.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.