Electrophotography – Image formation – Development
Reexamination Certificate
2007-07-10
2010-02-16
Gray, David M (Department: 2852)
Electrophotography
Image formation
Development
C399S265000
Reexamination Certificate
active
07664441
ABSTRACT:
A developer holding member includes a magnetic field generating device and a hollow body including the magnetic field generating device thereinside, and attracting a developer to an external surface thereof with magnetic force of the magnetic field generating device. The external surface of the hollow body is randomly provided with a large number of depressions, and a peak intensity of a spectrum within a range of wavelengths not more than 1 mm, which is figured out by performing a frequency analysis using a profile curve in a circumferential direction of the external surface, is not more than 12.
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U.S. Appl. No. 12/013,143, filed Jan. 11, 2008, Abe, et al.
Abe Hiroya
Imamura Tsuyoshi
Kamiya Noriyuki
Koetsuka Kyohta
Nakamura Shigeharu
Fekete Barnabas T
Gray David M
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Ricoh & Company, Ltd.
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