Electrophotography – Control of electrophotography process – Control of developing
Reexamination Certificate
2011-08-09
2011-08-09
Gray, David M (Department: 2852)
Electrophotography
Control of electrophotography process
Control of developing
C399S270000, C399S285000
Reexamination Certificate
active
07995943
ABSTRACT:
An image forming apparatus has a pair of spacedly opposed first and second bearing members, in which a powder developer material is moved from the first bearing member to the second bearing member. The apparatus also has an electric field generator. The generator forms an electric field between the first and second bearing members and outputs a first voltage and a second voltage alternately. The first voltage generates, between the first and second bearing members, a first electric field electrically forcing the developer material from the first bearing member toward the second bearing member. The second voltage generates between the first and second bearing members a second electric field electrically forcing the developer material from the second bearing member toward the first bearing member. Durations of the first and second voltages are determined so that the developer material forced out of the first bearing member due to the first electric field is forced back from the second bearing member toward the first bearing member due to the second electric field to impinge the developer material retained on the first bearing member and thereby flick the developer material on the first bearing member away therefrom and the flicked developer material is then forced from the first bearing member toward the second bearing member by the subsequent first electric field.
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Notice of Preliminary Rejection with English Translation, Japanese Application No. 2007-156772, dated Jun. 18, 2009.
Goto Hiroshi
Kouno Ryouji
Buchanan & Ingersoll & Rooney PC
Gray David M
Konica Minolta Business Technologies Inc.
Wong Joseph S
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