Developing assembly, process cartridge and image-forming method

Details Developing assembly, process cartridge and image-forming method Developing assembly, process cartridge and image-forming method

2005-08-02

2005-08-02

Goodrow, John L (Department: 1756)

Radiation imagery chemistry: process, composition, or product th

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

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

C430S110300, C399S284000, C399S286000

Reexamination Certificate

active

06924076

ABSTRACT:
In a developing assembly, a process cartridge and an image-forming method, a specific developer and a specific developer-carrying member are used in combination. The developer comprises toner particles containing at least a binder resin and a colorant, and conductive fine particles; the toner particles having a Circularity a of less than 0.970 as found from the following expression:in-line-formulae description="In-line Formulae" end="lead"?Circularitya=L0/Lin-line-formulae description="In-line Formulae" end="tail"?where L0represents the circumferential length of a circle having the same projected area as a particle image, and L represents the circumferential length of a projected image of a particle.The developer-carrying member has at least a substrate and a resin coat layer formed on the substrate; the resin coat layer containing at least a coat layer binder resin and a positively chargeable material.

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