Image forming apparatus
US9568851B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2016 |
| Grant date | Feb 14, 2017 |
| Priority date | — |
| Expiry date | Feb 25, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/021
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus that forms an image on a medium includes: an image carrying member; a charging unit disposed in proximity to the image carrying member; a power supply unit configured to sequentially apply a plurality of charging voltages to the charging unit when the medium is not fed through; a current detecting unit configured to detect an AC value flowing through the charging unit; a processing unit configured to perform first charging voltage determination control to derive a peak-to-peak voltage value to be used in a process; and a storage unit configured to pre-store a reference peak-to-peak voltage value for each wastage level of the image carrying member, wherein the processing unit: prohibits execution of the first charging voltage determination control and performs second charging voltage determination control; and obtains a reference peak-to-peak voltage value and derives a peak-to-peak voltage value to be used in the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.