Magnetic powder and magnetic toner

专利名称：Magnetic powder and magnetic toner发明人：Okano, Yoji,Fujioka, Kazuo,Aoki,

Koso,Misawa, Hiromitsu,Kurita, Eiichi,Fujii,Yasuhiko

申请号：EP92303640.4申请日：19920423公开号：EP0566790B1公开日：19960807

摘要：A specific magnetic particle powder is described, which is included in magnetictoners used for magnetic image character recognition (MICR). The magnetic particlepowder comprises magnetite particles and has a residual magnetization of 12 to 20emu/g, an Fe²⁺ content of 18.5 to 22.5 % by weight, a surface deposited with Si or Al oxideor a mixture thereof and a specific surface area of 3.5 to 9.5 m²/g. The magnetic particlepowder used as one component of a magnetic toner enables the formation of fineaccurate images and the exact detection of the image.

申请人：TODA KOGYO CORP

地址：JP

国籍：JP

代理机构：Woods, Geoffrey Corlett

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