Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Reexamination Certificate
2008-05-13
2008-05-13
Chapman, Mark A. (Department: 1795)
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
C430S108230, C430S108300, C430S108400, C430S108600, C430S111400
Reexamination Certificate
active
11079197
ABSTRACT:
A toner is formed of toner particles including a polyester resin as a principal component, and at least a colorant and a charge control agent, and externally added inorganic fine particles and organic fine particles. The toner has a volume-average diameter of 4 to 10 μm, contains the charge control agent at 0.1 to 1.5%, and has an acid value of 2 to 33 mgKOH/g. The charge control agent exhibits a number-basis isolation percentage of at most 10% with respect to the toner particle. The charge control agent, the inorganic fine particles and organic fine particles exhibit number-basis isolation percentages from the toner particles satisfying a following relationship: 30%>inorganic fine particles>organic fine particles>charge control agent>0%.
REFERENCES:
patent: 2297691 (1942-10-01), Carlson
patent: 5981129 (1999-11-01), Akazawa et al.
patent: 6348291 (2002-02-01), Sato
patent: 42-23910 (1967-11-01), None
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patent: 6-258863 (1994-09-01), None
patent: 2002-72544 (2002-03-01), None
patent: 2002-148846 (2002-05-01), None
patent: 2003-270838 (2003-09-01), None
Machine translation of JP 2003-270838.
U.S. Appl. No. 08/202,176, filed Feb. 25, 1994, Sato et al.
Translation of claims of JP 2003-270838, 2 pgs.
Chapman Mark A.
Toshiba Tec Kabushiki Kaisha
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