Developer

Details Developer Developer

2006-12-19

2006-12-19

Dote, Janis 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...

C430S108600, C430S108700, C430S111400

Reexamination Certificate

active

07150953

ABSTRACT:
A developer capable of providing an excellent image without causing a charging failure even after a long-term and repeated use contains a toner particle having a binder resin and a colorant, an inorganic fine particle, and a conductive fine particle, in which a volume average particle diameter Da of the conductive fine particle and an number average primary particle diameter Db of the inorganic fine particle satisfy the expression (1) below, and a rate of liberation “a” of the conductive fine particle from the toner particle is 40 to 95% and a rate of liberation “b” of the inorganic fine particle from the toner particle is 0.1 to 5%in-line-formulae description="In-line Formulae" end="lead"?Da≧10Db.   (1)in-line-formulae description="In-line Formulae" end="tail"?

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