Image forming apparatus with contact type charging member
US5678129A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1995 |
| Grant date | Oct 14, 1997 |
| Priority date | — |
| Expiry date | Sep 29, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/021
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes a charging member to be contacted with a rotating photosensitive body so as to charge the photosensitive body, a temperature detection device for detecting temperature of the charging member, and a voltage control device for controlling a voltage to be supplied to the charging member in accordance with a temperature value detected by the temperature detection device. The control device includes a detection temperature read device for reading the detection temperature value detected by the temperature detection device, a voltage calculation device for calculating a voltage to be supplied to the charging member based on the detection temperature value read by the detection temperature read device, and a maintenance device for maintaining a charging voltage as it is, which charging voltage is calculated last time, when a difference between the detection temperature value currently read by the detection temperature read device and the detection temperature value which is read last time by the detection temperature read device has exceeded a preset temperature value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.