Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1995-09-29
1998-01-27
Goodrow, John
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430122, G03G 9083
Patent
active
057120692
ABSTRACT:
A two-component type developer for developing an electrostatic image is constituted by at least a toner and a magnetic carrier. The toner has a weight-average particle size D4 of 1-10 .mu.m, a number-average particle size D1 and such a particle size distribution that particles having size of at most D1/2 occupy at most 20% by number and particles having sizes of at least D4.times.2 occupy at most 10% by volume. The magnetic carrier has a number-average particle size of 1-100 .mu.m and contains at most 20% by number of particles having sizes in the range of at most a half of the number-average particle size, the magnetic carrier has a resistivity of at least 1.times.10.sup.12 ohm.cm and has a core having a resistivity of at least 1.times.10.sup.10 ohm.cm, and the magnetic carrier has a magnetization at 1 kilo-oersted of 30-150 emu/g.
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Baba Yoshinobu
Tokunaga Yuzo
Canon Kabushiki Kaisha
Goodrow John
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