Electrophotography – Image formation – Development
Reexamination Certificate
2007-12-25
2007-12-25
Deb, Anjan (Department: 2858)
Electrophotography
Image formation
Development
Reexamination Certificate
active
11042583
ABSTRACT:
A developing apparatus develops an electrostatic latent image formed on a photoconductive drum with toner into a toner image. A developing roller has a surface on which a thin layer of toner is formed. The developing roller has a ten-point height of irregularities Rz such that 1 μm<Rz<DV and in pressure contact with the photoconductive drum to supply the toner to the electrostatic latent image. DV is a volume mean particle diameter. A developing blade is pressed against the surface of the developing roller to form a thin toner layer on the developing roller. The toner has parameters (1) 1 μm<DV<7 μm, (2) 0.9<roundness<0.97, (3) small-diameter particles (not larger than DV×0.5 μm) of not more than 20% by number percentage, (4) large-diameter particles (not smaller than DV×2.0 μm) of not more than 1% by volume percentage.
REFERENCES:
patent: 2002/0086781 (2002-07-01), Okuda et al.
patent: 2002/0127033 (2002-09-01), Inoue et al.
patent: 2003/0013032 (2003-01-01), Fields et al.
patent: 2003/0054269 (2003-03-01), Yamazaki et al.
patent: 2003/0091923 (2003-05-01), Kobayashi et al.
patent: 2003/0232185 (2003-12-01), Shimamura et al.
patent: 2004/0191662 (2004-09-01), Matsumura et al.
patent: 11-072960 (1999-03-01), None
patent: 2005215501 (2005-08-01), None
Akin Gump Strauss Hauer & Feld & LLP
Natalini Jeff
Oki Data Corporation
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