Porous ferrite core material for electrophotographic developer, resin-coated ferrite carrier and electrophotographic developer using the ferrite carrier

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United States of America Patent

PATENT NO 9201329
APP PUB NO 20130183614A1
SERIAL NO

13738324

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Abstract

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A porous ferrite core material for an electrophotographic developer wherein the apparent density thereof is 1.5 to 1.9 g/cm3, the shape factor SF-2 thereof is 101 to 110 and the magnetization as measured with a VSM at 1K·1000/4π·A/m is 40 to 60 Am2/kg, a resin-coated ferrite carrier for an electrophotographic developer obtained by coating the surface of the porous ferrite core material with a resin, and an electrophotographic developer using the ferrite carrier.

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Patent Owner(s)

Patent OwnerAddress
POWDERTECH CO LTDKASHIWA-SHI CHIBA 277-8557

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Aga, Koji Chiba, JP 48 149
Aoki, Masashi Chiba, JP 66 546
Ishikawa, Makoto Chiba, JP 200 1853

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