Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Reexamination Certificate
2008-10-09
2009-12-01
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...
C430S106100, C430S123500, C430S124400, C430S124510, C399S265000, C399S279000
Reexamination Certificate
active
07625685
ABSTRACT:
The present invention provides a magnetic mono-component toner which can suppress a selection development on a latent image carrier and can maintain favorable image properties for a long period by using a toner having the coarse powder distribution (S) within a given range in a jumping developing method and an image forming method which uses the toner. In the toner used in the jumping developing method which develops an electrostatic latent image formed on a latent image carrier using a developer carrier, the toner includes toner particles which contain at least a binding resin and a magnetic powder, and the coarse powder distribution (S) of the toner particles satisfies a following formula (1).in-line-formulae description="In-line Formulae" end="lead"?Coarse powder distribution (S)=(50−A)/2≧17 (volume %/μm) (1)in-line-formulae description="In-line Formulae" end="tail"?(wherein, A is a volume % of the coarse powder having particle sizes larger than D50based on volume by 2 μm or more).
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Carmody & Torrance LLP
Chapman Mark A
Kyocera Mita Corporation
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