Image forming apparatus having image bearing member life estimation unit
US9335697B2 · kind B2 · utility
6Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2013 |
| Grant date | May 10, 2016 |
| Priority date | — |
| Expiry date | Sep 6, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/0094
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes a photosensitive drum life estimation mechanism which estimates wear amounts of a charge transfer layer in both of a toner bearing area and an end portion of a toner non-bearing area of a developing roller and informs a user that the photosensitive drum has reached the end of its life if, out of total wear amounts of the areas corresponding to predetermined life threshold values of the toner bearing and non-bearing areas, either of the total wear amounts reaches the threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.