Carrier for magnetic developer and method of electrophotographic

Details Carrier for magnetic developer and method of electrophotographic Carrier for magnetic developer and method of electrophotographic

1997-10-31

2000-10-17

Brase, Sandra

Electrophotography

Image formation

Development

430105, 430108, 430111, G03G 1509

Patent

active

061344133

ABSTRACT:
A magnetic carrier for a developer used in electrostatically forming a visual image, comprising a magnetic core material, an electrically-conductive particle-containing resin layer and electrically-conductive particles externally added to the electrically-conductive particle-containing resin layer, the magnetic carrier having a magnetization (.sigma..sub.1000) of 61-100 emu/g at 1 kOe magnetic field, a specific volume resistance of 10.sup.6 .OMEGA..multidot.cm or less, and an average particle size of 10-100 .mu.m. The magnetic carrier of low specific volume resistance has a high durability and provides high quality images. In particular, when the magnetic carrier is applied to an image forming process by rear side exposure, the residual toner on the image-bearing member can be effectively removed without using an additional cleaning means, and high quality images free from the background fogging and contamination can be produced.

REFERENCES:
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patent: 5342721 (1994-08-01), Akamatsu
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patent: 5483329 (1996-01-01), Asanae et al.
patent: 5576134 (1996-11-01), Ogawa et al.

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