Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Reexamination Certificate
2005-12-06
2010-11-30
Huff, Mark F (Department: 1795)
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
C430S106100, C430S109100, C430S109200, C430S109300
Reexamination Certificate
active
07842447
ABSTRACT:
To provide a toner which allows low temperature fixation irrespective of the configuration of a fuser, which is excellent in offset resistance, and which provides high image quality at high and low humidities in a stable manner without causing any image defect over time. A toner containing: a binder resin and a colorant; in which the toner contains a THF-soluble component to be dissolved in tetrahydrofuran (THF); the binder resin component contained in the THF-soluble component contains: a vinyl resin unit (I) formed by at least a carboxyl group-containing vinyl resin and an epoxy group-containing vinyl resin and having an epoxy value of 0.001 to 1.000 eq/kg and a polyester unit (II) formed by condensation polymerization of monomers each containing fatty acid having 4 to 12 carbon atoms, aromatic tricarboxylic acid, and ethylene glycol; and the toner has a main peak present in a molecular weight region ranging from 3,000 to 30,000 on the measurement of a molecular weight distribution of the THF-soluble component by gel permeation chromatography (GPC).
REFERENCES:
patent: 6881528 (2005-04-01), Daimon et al.
patent: 2002/0098431 (2002-07-01), Fujikawa et al.
patent: 2004/0161688 (2004-08-01), Itakura et al.
patent: 2004/0191656 (2004-09-01), Ishiyama et al.
patent: 42-23910 (1967-11-01), None
patent: 43-24748 (1968-10-01), None
Fujimoto Masami
Yamazaki Katsuhisa
Yoshiba Daisuke
Canon Kabushiki Kaisha
Huff Mark F
Rossi Kimms & McDowell LLP
Vajda Peter L
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