Electrophotography – Control of electrophotography process – Control of charging
Reexamination Certificate
2006-04-25
2006-04-25
Beatty, Robert (Department: 2852)
Electrophotography
Control of electrophotography process
Control of charging
C399S012000
Reexamination Certificate
active
07035560
ABSTRACT:
A memory medium is provided to a cartridge detachably mountable to an image forming apparatus. Into the memory medium, as information for performing charge control, information on the amount of usage of an image-bearing member and information on a charging alternating voltage (a threshold value for selection control of a charging peak-to-peak voltage Vpp) are written. The image forming apparatus includes a charging-bias power-supply circuit, on its body side, including AC oscillation output circuit capable of outputting two or more species of alternating peak-to-peak voltages and an AC detector for detecting an alternating current passing through the image-bearing member. Charge control is performed on the basis of a detected value detected by the AC detector and memory information for the cartridge, whereby good charge control space saving, and cost reduction of the power-supply circuit are compatibly realized.
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U.S. Appl. No. 10/405,467, filed Apr. 3, 2003, K. Okano et al.
Motohashi Satoru
Okano Keiji
Sunahara Satoshi
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