Image forming apparatus having a high voltage power source for a contact charger
US5229818A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1991 |
| Grant date | Jul 20, 1993 |
| Priority date | — |
| Expiry date | Sep 11, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0266
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus, which is capable of obtaining high quality images, having a recording member on which a latent image is formed, a charging voltage generating portion which is positioned in contact with the recording member for the purpose of applying charging voltage containing an AC component to the recording member and from which said charging voltage is supplied, an application device for applying an AC component having a frequency, which is different from that of the AC component of the charging voltage, to the recording member, an electric current value control circuit for detecting an output AC value of the charging voltage generating portion so as to make the output AC value to be a predetermined value, and an erroneous operation preventing circuit for preventing an erroneous operation of the electric current value control circuit taken place due to an introduction of the AC component applied by the application device into the charging voltage generating portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.