Charging device and image forming apparatus containing the charg

Details Charging device and image forming apparatus containing the charg Charging device and image forming apparatus containing the charg

1994-09-07

1997-05-27

Braun, Fred L.

Electrophotography

Image formation

Charging

G03G 1502

Patent

active

056341792

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.

REFERENCES:
patent: 4326794 (1982-04-01), Nishimura
patent: 4454559 (1984-06-01), Shenoy
patent: 4750019 (1988-06-01), Kamitani
patent: 4851960 (1989-07-01), Nakamura et al.
patent: 5089851 (1992-02-01), Tanaka et al.
patent: 5126913 (1992-06-01), Araya et al.
patent: 5146281 (1992-09-01), Kisu
patent: 5177534 (1993-01-01), Kisu et al.

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