Developing device, image forming apparatus, and image...

Details Developing device, image forming apparatus, and image... Developing device, image forming apparatus, and image...

2011-08-16

2011-08-16

Le, Hoa V (Department: 1721)

Electrophotography

Having particular structure

Modular or displaceable

C399S279000, C430S084000, C430S096000

Reexamination Certificate

active

08000631

ABSTRACT:
A developing device is provided to suppress image density unevenness by adjusting conditions of toner adhesion to an amorphous silicon photoconductor to a suitable range even when using both an amorphous silicon photoconductor and a nonmagnetic monocomponent toner and practicing development in a non-contact system. The developing device satisfies the relational expression:in-line-formulae description="In-line Formulae" end="lead"?(f×1.5/θ)2>−1.576×10−2×q/m×(Vpp/Ds2)+31.9×106in-line-formulae description="In-line Formulae" end="tail"?where Ds (m) is a distance between the photoconductor and the toner carrier, f (Hz) is a frequency of an AC bias applied to the toner carrier, Vpp (V) is an amplitude of the AC bias, θ (−) is a ratio of a peripheral speed of the toner carrier to a peripheral speed of the amorphous silicon photoconductor, and q/m (C/kg) is a charge quantity per unit mass of the toner.

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