Image forming apparatus detecting useful life of an image bearing member
US5805951A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1996 |
| Grant date | Sep 8, 1998 |
| Priority date | — |
| Expiry date | Jan 23, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2221/183
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus for detecting the useful life of an image bearing member includes an image bearing member; a charging member contactable to the image bearing member for charging the image bearing member, the charging member being supplied with a voltage. The image forming apparatus also includes a discharging member for electrically discharging the image bearing member, the discharging member discharging a first region of the image bearing member and a second region of the image bearing member, different from the first region in a direction of a generating line of the image bearing member; and a detecting device for detecting a current flowing through the charging member when the charging member is supplied with a predetermined voltage and charges the first region having been discharged by the discharging member and when the charging member also charges the second region having been discharged by the discharging member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.