Process for producing toner particles

Details Process for producing toner particles Process for producing toner particles

2006-01-20

2009-02-24

Goodrow, John L (Department: 1795)

Radiation imagery chemistry: process, composition, or product th

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

Process of making developer composition

C430S137100

Reexamination Certificate

active

07494758

ABSTRACT:
In a process for producing toner particles by granulation carried out in an aqueous medium, a process for producing toner particles is provided which toner particles have a sharp particle size distribution and can achieve a high image density.In a process for producing toner particles to be obtained by granulating in an aqueous medium a colorant composition containing at least a colorant, an apparatus which forms the toner particles by granulation has a granulation tank and a stirrer, and, where the internal volume of the granulation tank is represented by A (L) and the volume of an air layer portion in the interior of the granulation tank by B (L), the air layer portion proportion B/A satisfies the following expression (1):in-line-formulae description="In-line Formulae" end="lead"?0.05≧B/A  (1).in-line-formulae description="In-line Formulae" end="tail"?

REFERENCES:
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patent: 6309788 (2001-10-01), Tsuji et al.
patent: 2003/0175610 (2003-09-01), Kitani et al.
patent: 05-034976 (1993-02-01), None
patent: 08-069126 (1996-03-01), None

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