Charging device and image forming apparatus containing the charging device
US5634179A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 1994 |
| Grant date | May 27, 1997 |
| Priority date | — |
| Expiry date | Sep 7, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0216
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A charging device for charging a moving photoconductor. The charging device includes a charging member, an electric power supply for applying a voltage to the charging member, and a light exposing device, such as a LED for exposing surfaces of the charging member and the photoconductor in a closing region where the surfaces of the charging member and the photoconductor move closer to each other. The charging member is a blade having a transparent layer for guiding a light beam from the LED to the closing region and a shading layer for shading the light beam to a contacting region and a separating region. The contacting region is where the surfaces of the charging member and the photoconductor contact, and the separating region is where the surfaces of the charging member and the photoconductor gradually separate from each other. The LED is disposed in the vicinity of an end of the transparent layer opposite to the other end in the closing region in a section parallel to the moving direction of the photoconductor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.