Transferring device having charging device with double oxide and voltage control
US5034777A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1990 |
| Grant date | Jul 23, 1991 |
| Priority date | — |
| Expiry date | Jun 14, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/1675
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes a movable image bearing member; an image forming device for forming an image on the image bearing member; a transfer device for transferring an image from the image bearing member to a transfer material at a transfer position, wherein the transfer device is contactable to a backside of the transfer material at the transfer position and includes a charging member including a double oxide and a voltage source for applying a voltage to the charging member, and wherein the voltage source constant-voltage-controls the charging member when an image region of the image bearing member is at the transfer position, and constant-current-controls the charging member in at least a part of a period when the image region of the image bearing member is not at the transfer position, wherein a constant voltage for the constant voltage control is determined on the basis of the constant current control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.