Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1998-04-08
1999-11-02
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, 430137, 4301066, G03G 9097
Patent
active
059767510
ABSTRACT:
The present invention provides electrophotographic printing-use toner capable of producing a quality image, without depending on excessive addition of a fluidizing agent, even after maintained at high temperature which causes toner to aggregate. The electrophotographic printing-use toner constituting two-component developer with magnetic powder carrier, made of a toner mother particle including binding agent synthetic resin and a coloring agent, whose surface is added with a fluidizing agent is manufactured so that a ratio of .DELTA.Q.sub.h /.DELTA.Q.sub.s is not less than 0.37, more preferably not less than 0.45, where .DELTA.Q.sub.s is a charging rate of the toner mother particle, at a start of mixing with respect to the magnetic powder carrier, maintained at normal temperature, and .DELTA.Q.sub.h is a charging rate of the toner mother particle, at the start of mixing, maintained under a condition of temperature and time which causes the electrophotographic printing-use toner to aggregate.
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Ishida Toshihisa
Morinishi Yasuharu
Nagahama Hitoshi
Nakamura Tadashi
Ogawa Satoshi
Conlin David G.
Daley, Jr. William J.
Martin Roland
Sharp Kabushiki Kaisha
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