Apparatus for supplying voltage to developing device

Details Apparatus for supplying voltage to developing device Apparatus for supplying voltage to developing device

2007-09-04

2007-09-04

Grainger, Quana (Department: 2852)

Electrophotography

Machine operation

Electrical connection

Reexamination Certificate

active

10671778

ABSTRACT:
A voltage supply device for developing devices of a color image forming apparatus has a printed circuit board (PCB) connected with a high voltage supply source, a plurality of fixed contact point terminals provided at one end of the respective color developing devices, and a plurality of voltage changeover units for selectively connecting the PCB and the fixed contact point terminals to selectively supply the voltage from the high voltage supply source to the respective color developing devices. With the voltage supply device, contact point changeover is enabled without having to move the developing device, by using a relay part of a relatively simple structure during the change of developing device. Accordingly, deterioration of printing quality due to shock from the contact with the developing device is avoided, and the reliability of high voltage contact point changeover is improved. Further, the number of high voltage wiring harness, which is required for supplying voltage from the high voltage supply source to the developing devices, can be reduced.

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Office Action issued Feb. 25, 2005 issued from Korean Intellectual Property Office.
Office Action issued on Oct. 31, 2006 by the Japanese Patent Office in the corresponding Japanese Patent Application No. 2003-340923.

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