Electrophotography – Control of electrophotography process – Control of developing
Reexamination Certificate
2011-06-28
2011-06-28
Porta, David P (Department: 2884)
Electrophotography
Control of electrophotography process
Control of developing
C399S027000
Reexamination Certificate
active
07970305
ABSTRACT:
The development apparatus that develops an electrostatic latent image formed on an image carrier comprises: a developer roller operable to carry toner on a circumferential surface thereof and develop the electrostatic latent image using the toner; a supply roller operable to perform toner supply to the developer roller; a voltage applier operable to apply a bias voltage V1to the developer roller and apply a bias voltage V2to the supply roller; and a controller operable to control the voltage applier in a toner compulsive consumption mode so that a value obtained by subtracting an average S2of the bias voltage V2per unit time from an average S1of the bias voltage V1per unit time indicates the same polarity as a normal charging polarity of the toner. Here, the toner compulsive consumption mode performs development to compulsively consume the toner carried on the circumferential surface of the developer roller.
REFERENCES:
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patent: 2005/0047832 (2005-03-01), Hashimoto
patent: 2008/0152366 (2008-06-01), Endou et al.
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Notification of Reasons for Rejection issued in corresponding Japanese Patent Application No. 2007-177542, mailed Feb. 23, 2010, and English translation thereof.
Notification of Reasons for Rejection, Japanese Application No. 2007-177542, dated Jun. 23, 2009.
Hayase Toru
Kato Tomohiro
Kitada Tomo
Okuno Yuusuke
Buchanan & Ingersoll & Rooney PC
Igyarto Carolyn
Konica Minolta Business Technologies Inc.
Porta David P
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