Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1997-12-19
1999-12-14
Martin, Roland
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430111, 430120, 399252, G03G 9097
Patent
active
060015276
ABSTRACT:
The present invention provides an electrostatic image developer comprising a toner and a carrier wherein the toner includes toner particles having an average particle diameter of 3 to 9 .mu.m, a hydrophobic silica microparticles having a BET specific surface area of 40 to 120 m.sup.2 /g, and a hydrophobic titanium compound microparticles having a BET specific surface area of 40 to 250 m.sup.2 /g; and wherein the carrier is a resin coated carrier having a coating layer of a resin. The electrostatic image developer can improve the environmental dependency of charging, power fluidity, resistance to caking of a toner and reduced change in charging with time course to provide an image with an excellent image quality for a long period of time.
REFERENCES:
patent: 2297691 (1942-10-01), Carlson
patent: 2357809 (1944-09-01), Carlson
patent: 5272040 (1993-12-01), Nakasawa et al.
Ichimura Masanori
Iida Yoshifumi
Imai Takashi
Ishihara Yuka
Nakazawa Hiroshi
Fuji 'Xerox Co., Ltd.
Martin Roland
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