Electrophotography – Having particular structure – Modular or displaceable
Reexamination Certificate
2011-01-18
2011-01-18
Le, Hoa V (Department: 1795)
Electrophotography
Having particular structure
Modular or displaceable
C399S116000, C399S119000, C399S258000, C399S262000, C399S263000, C399S264000, C399S274000
Reexamination Certificate
active
07873300
ABSTRACT:
A single component development device including a toner including a resin, a coloring agent, a wax, a charge control agent and an inorganic particulate, a development roller to bear the toner on the surface of the development roller and transfer the toner to an image bearing member and a thin layer forming member to regulate a thickness of the layer of the toner while in contact with the surface of the development roller via the toner borne thereon, wherein a regulating pressure A between the thin layer forming member and the development roller is from 25 to 60 (N/m), a content Z (weight %) of the charge control agent satisfies the following relationship (1) and an average dispersion particle diameter D (nm) of the charge control agent satisfies the following relationship (2):in-line-formulae description="In-line Formulae" end="lead"?0.029×A−0.150>Z>0.013×A−0.013 Relationship (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?D<6.3×A−106.3 Relationship (2).in-line-formulae description="In-line Formulae" end="tail"?
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U.S. Appl. No. 12/027,704, filed Feb. 7, 2008, Kazuoki Fuwa et al.
Fuwa Kazuoki
Hagi Masayuki
Katoh Hiroaki
Mikuriya Yoshihiro
Ogawa Satoshi
Le Hoa V
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Ricoh Company Limited
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