Recorders – Printing – dotting – or punching marker – Ink transfer support or moving means
Patent
1990-03-28
1993-01-12
Moses, R. L.
Recorders
Printing, dotting, or punching marker
Ink transfer support or moving means
355271, G01D 1514
Patent
active
051793970
ABSTRACT:
An image forming apparatus includes a movable image bearing member; an image forming device for forming a toner image on the image bearing member; image transfer device for transferring the toner image from the image bearing member to a transfer material at an image transfer station, wherein the transfer device includes a charging member press-contacted or faced to the image bearing member and a device for applying a voltage to the charging member, wherein the voltage applying device applies a voltage to the charging member so that the charging member is constant-voltage-controlled when an image region of the image bearing member is in the transfer station, and the charging member is constant-current-controlled during at least a part of a period when it is not in the transfer station, wherein a voltage V2 applied during the constant voltage control is a voltage V1 appearing in the transfer device during the constant current control multiplied by a coefficient R, in which R is larger than 1.
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Araya Junji
Hasegawa Hiroto
Hiroshima Koichi
Ishiyama Tatsunori
Nakahata Kimio
Canon Kabushiki Kaisha
Moses R. L.
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