Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1993-02-08
1994-08-09
Martin, Roland
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430108, 430111, 430122, G03G 9107
Patent
active
053365801
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.
REFERENCES:
patent: 4822709 (1989-04-01), Ohtani et al.
patent: 4847176 (1989-07-01), Sano et al.
patent: 4879198 (1989-11-01), Tavernier et al.
patent: 4902597 (1990-02-01), Takeda et al.
patent: 5013626 (1991-05-01), Matsumura et al.
de Beeck Werner Op
Marksch Paul
Tavernier Serge
Van Wunsel Danny
Agfa-Gevaert N.V.
Martin Roland
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