Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Reexamination Certificate
2007-08-31
2011-11-29
Le, Hoa (Department: 1721)
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
C430S110400
Reexamination Certificate
active
08067141
ABSTRACT:
A carrier is provided including a core and a resin layer located overlying the core, wherein the carrier has a weight average particle diameter (Dw) of from 22 to 50 μm, a ratio (Dw/Dp) of the weight average particle diameter (Dw) to a number average particle diameter (Dp) of from 1 to 1.30, a shape factor SF-1 of from 100 to 120, and a shape factor SF-2 of from 100 to 120, and wherein the carrier comprises core particles satisfying the following relationship 0.52<(d/D)<1.0 in an amount of from 0 to 10,000 ppm by number: wherein D (μm) represents a diameter of a circle having the same area as that of a projected image of a core particle and d (μm) represents a diameter of a circle having the same area as that of a projected image of a maximum hollow present in the core particle.
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Imahashi Naoki
Nagayama Masashi
Yamaguchi Kimitoshi
Cooper & Dunham LLP
Le Hoa
Ricoh & Company, Ltd.
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