Carrier composition for electrophotography
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United States of America Patent
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Aug 9, 1994
Grant Date -
N/A
app pub date -
Feb 8, 1993
filing date -
Feb 29, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
According to the present invention magnetic carrier particles are provided for use in magnetic brush toner-carrier development of electrostatic charge patterns, said particles incorporating finely divided magnetic pigment particles dispersed in a resin binder, characterized in that said carrier particles comprise a mixture of magnetic pigment particles wherein a portion (A) of said pigment particles has a coercive force of more than 300 Oe and another portion (B) of said pigment particles has a coercive force of less than 300 Oe, the weight ratio of said portions (A) and (B) being in the range of 0.1 to 10.
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