Image forming apparatus
US5303011A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 1992 |
| Grant date | Apr 12, 1994 |
| Priority date | — |
| Expiry date | May 8, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0849
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus. In a copy control mode, a main motor, an eraser, a cleaning bias power source, a cleaning motor, a developing bias power source, a discharge lamp, and a pretransfer discharger are turned on. Then, a precleaning discharger and a main charger are turned on. After such units have been stabilized, a developing motor is energized. Even when a developing unit is operated while an image forming operation is not under way, a toner and a carrier forming a magnet brush on a developing roller included in the developing unit are prevented from depositing on a photoconductive element and, therefore, from being scattered around, damaging the photoconductive element or contaminating the background. Further, the carrier is prevented from causing a spark to occur in a corona discharger and burning the discharger by entering it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.