Electrophotography – Image formation – Development
Reexamination Certificate
2008-05-16
2010-02-16
Chen, Sophia S (Department: 2852)
Electrophotography
Image formation
Development
C399S237000
Reexamination Certificate
active
07664437
ABSTRACT:
This invention relates to a developing unit for maintaining constant density in an electrophotographic imaging process. The developing unit has a developer roll, wherein the developer roll provides a surface and a first voltage is applied to the developer roll; a skive device, wherein the skive device is positioned in contact with the developer roll and a second voltage is applied to the skive device; a cleaning device for the developer roll, wherein the cleaning device is in contact with the developer roll; and an ink container, wherein the developer roll and the cleaning device are inside the ink container. It is preferred that a current measuring device is present to measure current flow between skive device and the developer, or a voltage meter is present to measure a voltage across a known resistor that is in series with the power supply to the skive device.
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Chinese Office Action issued in Chinese Application No. 031491677, mailed Nov. 18, 2005.
Partial English language translation of Chinese Office Action issued in Chinese Application No. 031491677, mailed Nov. 18, 2005.
English language abstract of JP 63-074083, published Apr. 4, 1988.
English language abstract of JP 2002-333778, published Nov. 22, 2002.
English language abstract of JP 09-211993, published Aug. 15, 1997.
English language abstract of JP 08-15993, published Jan. 19, 1996.
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English language abstract of JP 2001-324876, published Nov. 22, 2001.
English language abstract of JP 2001-194912, published Jul. 19, 2001.
Edwards William D.
Kellie Truman F.
Chen Sophia S
DLA Piper (LLP) US
Samsung Electronics Co,. Ltd.
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