Developing device including two developer carrying members

Details Developing device including two developer carrying members Developing device including two developer carrying members

2006-05-30

2006-05-30

Royer, William J. (Department: 2852)

Electrophotography

Image formation

Development

C399S276000, C399S277000

Reexamination Certificate

active

07054583

ABSTRACT:
A developing device having a first developing sleeve for supplying developing agent to the first developing area A, and a second developing sleeve for supplying developing agent, handed from the first developing sleeve, to a second developing area B, the surfaces of the first developing sleeve and the second developing sleeve are subjected to roughening such that the average inter-peak distances thereof differ between the first developing sleeve and the second developing sleeve. This prevents fusion of toner due to toner particles becoming embedded in recesses of course formations on the surface of the developing sleeves, resulting in extensive usage periods yielding high image quality.

REFERENCES:
patent: 5930569 (1999-07-01), Roof et al.
patent: 6459862 (2002-10-01), Sakemi et al.

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