Electrophotography – Control of electrophotography process – Control of transfer
Patent
1994-10-06
1997-10-28
Ramirez, Nestor R.
Electrophotography
Control of electrophotography process
Control of transfer
399 88, G03G 1516
Patent
active
056825757
ABSTRACT:
An electrophotographic recording apparatus comprises a photosensitive drum, a transfer roller, a high voltage power supply circuit for applying a transfer voltage to the transfer roller and a CPU for controlling the entire apparatus. The high voltage power supply circuit supplies an output voltage corresponding to a control signal issued from the CPU as the transfer voltage to the transfer roller. At this time, the high voltage power supply circuit sends a current detection signal to the CPU to inform the same of an output current which flows to the transfer roller. On the other hand, the CPU outputs a control signal to the high voltage power supply circuit, the control signal corresponding to said current detection signal output from the high voltage power supply circuit. As a result, even if the output current is varied depending on the kind of the print medium and the resistance of the transfer roller, it is possible to generate the output voltage in accordance with the varied output current.
REFERENCES:
patent: 4338017 (1982-07-01), Nishikawa
patent: 5099287 (1992-03-01), Sato
patent: 5291253 (1994-03-01), Kumasaka et al.
OKI Electric Industry Co., Ltd.
Ramirez Nestor R.
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