Magnetic particles for charging, charging member, charging devic

Details Magnetic particles for charging, charging member, charging devic Magnetic particles for charging, charging member, charging devic

1999-06-09

2000-12-05

Chen, Sophia S.

Electrophotography

Image formation

Charging

361221, G03G 1502

Patent

active

061578010

ABSTRACT:
A magnetic particle for charging is disclosed. The magnetic particle includes magnetic particles having particle diameters of 5 .mu.m or more. The magnetic particles having particle diameters of 5 .mu.m or more have a standard deviation of short-axis length/long-axis length of 0.08 or more, and a volume resistance value in the range of 10.sup.4 to 10.sup.9 .OMEGA.cm. Also, provided are a charging member, a charging device, a process cartridge and an electrophotographic apparatus, using the magnetic particle.

REFERENCES:
patent: 5367365 (1994-11-01), Haneda et al.
patent: 5835821 (1998-11-01), Suzuki et al.
patent: 5930566 (1999-07-01), Ishiyama

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