Electrophotography – Control of electrophotography process – Responsive to number of copies or passage of time
Reexamination Certificate
2004-09-27
2008-03-11
Beatty, Robert (Department: 2852)
Electrophotography
Control of electrophotography process
Responsive to number of copies or passage of time
C399S055000, C399S066000
Reexamination Certificate
active
07343109
ABSTRACT:
An image forming apparatus including: a developing device that develops an electrostatic latent image formed on an image bearing body into a visible image by using a charged developer, so as to form a developer image on the image bearing body; a developing-bias supplying device that supplies, to the developing device, a developing bias necessary for developing the electrostatic latent image into the visible image; a transfer device that transfers the developer image formed on the image bearing body onto a recording medium; a transfer-bias supplying device that supplies, to the transfer device, a transfer bias necessary for transferring the developer image onto the recording medium; and a controller that carries out at least one of (A) developing-bias-dependent transfer-bias control for controlling the transfer bias supplied by the transfer-bias supplying device to the transfer device, on the basis of the developing bias supplied by the developing-bias supplying device to the developing device, and (B) operation-amount-dependent developing-and-transfer-bias control for controlling the developing bias supplied by the developing-bias supplying device to the developing device and the transfer bias supplied by the transfer-bias supplying device to the transfer device, on the basis of an operation amount of the image forming apparatus.
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Beatty Robert
Brother Kogyo Kabushiki Kaisha
Oliff & Berridg,e PLC
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