Electrophotography – Control of electrophotography process – Control of transfer
Reexamination Certificate
2008-09-19
2011-11-29
Gray, David (Department: 2852)
Electrophotography
Control of electrophotography process
Control of transfer
C399S302000, C399S303000
Reexamination Certificate
active
08068755
ABSTRACT:
An image forming apparatus is provided in which image forming sections are provided along an intermediate transfer member and in which a test voltage is applied to a transfer member to control a transfer voltage. In the image forming apparatus, the test voltage is applied to a region of the intermediate transfer member in an upstream image forming section. The test voltage is controlled so as to be applied at a time except when that region of the intermediate transfer member passes through a downstream image forming section. Accordingly, when the intermediate transfer member is charged by applying the test voltage to the transfer member in the upstream image forming section, the transfer voltage can be appropriately controlled in the downstream image forming section.
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Canon Kabushiki Kaisha
Gray David
Wong Joseph S
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