High voltage power supply for image transfer and image forming a

Details High voltage power supply for image transfer and image forming a High voltage power supply for image transfer and image forming a

1995-05-01

1997-11-04

Berhane, Adolf

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

355271, H02M 744, G03G 1514

Patent

active

056846851

ABSTRACT:
The invention is to provide an improved high voltage transfer power supply and an image forming apparatus, regardless of resistance connected in series to the transfer roller and impedance change of the transfer roller. The high voltage transfer power supply, if the voltage produced from the output winding NS1 of the transfer transformer T1 is controlled based on the set value of register 8 merely by the process of ATVC, can provide neither an appropriate transfer voltage nor an excellent transfer image. Accordingly, a correction value resulting from the resistance R2 and the impedance change of the transfer roller by means of CPU12, and a set value in a register 8 is corrected by the correction value to obtain an optimal transfer image of the original.

REFERENCES:
patent: 5151736 (1992-09-01), Ohzeki et al.
patent: 5179397 (1993-01-01), Ohzeki et al.
patent: 5311268 (1994-05-01), Ohzeki et al.
patent: 5485248 (1996-01-01), Yano et al.

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