Electrophotography – Image formation – Development
Reexamination Certificate
2007-07-03
2010-11-16
Ngo, Hoang (Department: 2852)
Electrophotography
Image formation
Development
C399S272000
Reexamination Certificate
active
07835671
ABSTRACT:
A developing device comprises a feeding and conveying path; a stirring and conveying path; and a recovering and conveying path, and capable of extending the service life of a developer and of forming an image with stable image density. In the developing device, the central position of a stirring rotary shaft that is a rotary shaft of a stirring screw and the central position of a feeding rotary shaft that is a rotary shaft of a feed screw are disposed at almost the same height. A recovering rotary shaft that is a rotary shaft of a recovering screw is so disposed that the central position thereof is higher than the central positions of the stirring rotary shaft and feeding rotary shaft, and lower than a rotation central position of the developing rotary shaft that is a rotary shaft of a developing roller.
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Ngo Hoang
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Ricoh & Company, Ltd.
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