Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Reexamination Certificate
2006-07-04
2006-07-04
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...
C430S110400, C430S111410, C430S124300
Reexamination Certificate
active
07070899
ABSTRACT:
An electrophotographic developer is provided for realizing high-quality images and superior reproducibility of laser dots in a low coverage region and reduced unevenness of color in halftone solid images. The electrophotographic developer includes a toner and a carrier. The toner has a shape factor of 140 or less and a volume average particle size distribution GSDv of 1.3 or less. The carrier has a coat resin layer on a core material, the coat resin layer containing a conductive powder. The core material has a dynamic electric resistivity of 1 Ω·cm or less under an electric field of 104V/cm in a form of a magnetic brush. The conductive powder has an electric resistivity of 101Ω·cm or greater and 106Ω·cm or less. The carrier has an electric resistivity in a range between 10 and 1×108Ω·cm. An image forming method is also provided wherein the electrophotographic developer is used for development in a developing stage.
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Furuya Nobumasa
Yanagida Kazuhiko
Yukutake Takashi
Fuji 'Xerox Co., Ltd.
Goodrow John L
Oliff & Berridg,e PLC
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