Toner for developing electrostatic image

Details Toner for developing electrostatic image Toner for developing electrostatic image

2006-12-12

2006-12-12

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...

C430S109400, C430S110400, C430S111400

Reexamination Certificate

active

07147979

ABSTRACT:
A toner for developing an electrostatic image, comprising, a binder resin, a colorant, a charge control agent, and a parting agent, and wherein: a volume average particle diameter (Dv) of toner particles is 3 to 10 μm; a ratio (Dv/Dp) of Dv to a number average particle diameter (Dp) is 1 to 1.3; an average circle degree is 0.93 to 0.995; and location parameter of island-shaped separate phase is 25 number % or more, wherein the location parameter is the percentage of such sectional photo image of toner particles where a maximum diameter of island-shaped separate phase is 1 μm or more and an outermost portion of said island-shaped separate phase is present at the depth of 0.01 to 0.15 time of the particle diameter of each toner particle under the surface.

REFERENCES:
patent: 6436599 (2002-08-01), Matsuoka et al.
patent: 6596453 (2003-07-01), Fujino et al.
patent: 2003/0027074 (2003-02-01), Emoto et al.
patent: 53-17736 (1978-02-01), None
patent: 5-197193 (1993-08-01), None
patent: 2000-56508 (2000-02-01), None
patent: 2002-108012 (2002-04-01), None

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