Developing assembly, image-forming apparatus and process...

Details Developing assembly, image-forming apparatus and process... Developing assembly, image-forming apparatus and process...

2005-01-11

2005-01-11

Chapman, Mark A. (Department: 1756)

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Post imaging process, finishing, or perfecting composition...

C430S111100, C430S111300, C430S111400, C399S252000, C399S258000, C399S259000

Reexamination Certificate

active

06841327

ABSTRACT:
In a developing assembly including a two-component developer container and a developer-carrying member, the developer-carrying member has at least a substrate and a resin coat layer formed on the substrate surface, and the resin-coat layer contains at least a binder resin and solid particles for making the resin-coat-layer surface uneven. The solid particles have an average circularity of 0.64 or more, which is the average value of the values calculated according to the equationin-line-formulae description="In-line Formulae" end="lead"?Circularity=(4×A)/{(ML)2×Π},in-line-formulae description="In-line Formulae" end="tail"?(wherein ML represents the Pythagorean-method maximum length of a particle projected image, and A represents the projected area of a particle image), and the resin-coat layer has a surface roughness fulfilling specific conditions attributable to the solid particles. Also disclosed are an image-forming apparatus and a process cartridge which employ the developing assembly.

REFERENCES:
patent: 4989044 (1991-01-01), Nishimura et al.
patent: 5860050 (1999-01-01), Shimamura et al.
patent: 1-277265 (1989-11-01), None

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