Image forming apparatus with supply unit having high applied...

Details Image forming apparatus with supply unit having high applied... Image forming apparatus with supply unit having high applied...

2007-11-13

2010-12-14

Gray, David M (Department: 2852)

Electrophotography

Image formation

Development

C399S281000, C399S286000

Reexamination Certificate

active

07853187

ABSTRACT:
An image forming apparatus including a photosensitive member on which an electrostatic latent image is formed, an image forming unit to form a visible image on the photosensitive member formed with the electrostatic latent image, and a transfer device to transfer the visible image formed on the photosensitive member onto a printing medium. The image forming unit includes a developing agent storage vessel to store a developing agent therein, a developing unit having a conductive layer to which the developing agent is attached and used to attach the developing agent to the photosensitive member, and a supply unit to supply the developing agent stored in the developing agent storage vessel to the developing unit. The developing unit and the supply unit satisfy a relational expression 1.7≦log Sr/log Dr≦2.5, where Sr a volume resistance of the supply unit and Dr is a volume resistance of the developing unit.

REFERENCES:
patent: 2004/0120731 (2004-06-01), Machida et al.
patent: 2003-65628 (2003-08-01), None

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