Image forming apparatus including transfer unit and capable of determining lifetime of transfer unit
US11442389B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2021 |
| Grant date | Sep 13, 2022 |
| Priority date | — |
| Expiry date | Jul 28, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/553
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes a photosensitive drum, a transfer unit, a voltage supply circuit, and a controller. The transfer unit is configured to transfer developer onto a printing medium from the photosensitive drum. The voltage supply circuit is configured to supply voltage to the transfer unit. The controller is electrically connected to the voltage supply circuit. The controller is configured to: calculate a cumulative voltage value, the cumulative voltage value being a total of supplied voltage to the transfer unit from the voltage supply circuit after using the transfer unit is started; and determine how long a lifetime of the transfer unit remains based on the calculated cumulative voltage value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.