Magnetic carrier and two component developer

Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...

Reexamination Certificate

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C430S111350, C430S111400

Reexamination Certificate

active

07927775

ABSTRACT:
Provided is a magnetic carrier giving a high quality image free of density variation without the occurrence of fogging or carrier adhesion and having excellent dot reproducibility even during long-term use. The magnetic carrier has magnetic carrier particles produced by filling pores of porous magnetic core particles with a resin. The magnetic carrier contains 80% by number or more of the magnetic carrier particles satisfying the specific conditions (a) and (b) when 18 straight lines passing through a reference point of a cross section of the magnetic carrier particle are drawn at intervals of 10° in a reflected electron image of the cross section of the magnetic carrier particle photographed by a scanning electron microscope.

REFERENCES:
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patent: 6653036 (2003-11-01), Tanikawa et al.
patent: 2006/0269862 (2006-11-01), Kobayashi et al.
patent: 2007/0048649 (2007-03-01), Kobayashi et al.
patent: 08-050377 (1996-02-01), None
patent: 08-160673 (1996-06-01), None
patent: 8-254857 (1996-10-01), None
patent: 2006-337579 (2006-12-01), None
patent: 2007-057943 (2007-03-01), None
patent: 4001606 (2007-10-01), None
International Search Report issued in the corresponding International Application No. PCT/JP2009/064092 dated Nov. 2, 2009 (10 pages).

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