Electrophotography – Control of electrophotography process – Control of cleaning
Patent
1995-11-13
1998-04-14
Grimley, Arthur T.
Electrophotography
Control of electrophotography process
Control of cleaning
399 55, 399299, G03G 2100, G03G 1500
Patent
active
057404933
ABSTRACT:
An electrophotographic recording apparatus that removes reverse-charged toner that is charged with a polarity opposite to a polarity of a normal-charged toner. The apparatus includes a carrier belt; a transfer roller for carrying the toner adhering to the surface of the photosensitive body toward the carrier belt; a transfer power supply for applying to the transfer roller a first voltage that causes the normal-charged toner adhering to the surface of the photosensitive body to be transferred to the recording medium on the carrier belt, and a second voltage, of opposite polarity to the first voltage, that causes the reverse-charged toner adhering to the surface of the photosensitive body to be transferred to the carrier belt; and a carrier belt cleaning blade. A control circuit controls an operation of the transfer power supply, whereby the first voltage is applied to the transfer roller during an image-forming stage, and the second voltage is applied to the transfer roller during a reverse-charged toner removing stage. For example, the normal-charged toner may have a negative polarity, the reverse-charged toner may have a positive polarity, the first voltage may be positive, and the second voltage may be negative.
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Inoue Hiroyuki
Ogata Syuichiro
Okiyama Yoshitatsu
Otaki Noboru
Sakai Masato
Chen Sophia S.
Grimley Arthur T.
Oki Data Corporation
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