Electrophotography – Control of electrophotography process – Control of transfer
Reexamination Certificate
2005-02-22
2005-02-22
Chen, Sophia S. (Department: 2852)
Electrophotography
Control of electrophotography process
Control of transfer
C399S045000, C399S314000
Reexamination Certificate
active
06859630
ABSTRACT:
An image transferring and recording medium conveying device, for an image forming apparatus, which includes a nip between a belt and an image carrier for image transfer to a recording medium. A bias applying device applies a bias for image transfer to the nip. An image transfer bias Tb is applied during a leading edge interval, in which the leading edge portion of the recording medium between the leading edge and a preselected position in the direction of medium conveyance moves away from the nip. An image transfer bias Ta is applied to the nip during a remaining interval, in which the remaining portion of the recording medium moves away from the nip. A controller switches the image transfer bias Tb within a range lower than the image transfer bias Ta and greater than an image transfer bias Tc.
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Matsuda Itaru
Tanoue Ryoh
Chen Sophia S.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ricoh & Company, Ltd.
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