Patent ID: 6696212
Filing Date: 2004-02-24
Classification: G03G

Abstract:
A method of MICR electrostatic magnetic imaging comprising the steps of:forming an electrostatic latent image on a surface of an electrophotographic element; and developing the latent image by contacting the latent image with a monocomponent electrostatographic developer to produce a fused MICR image readable in a MICR reader/sorter, wherein said developer comprises negatively charging toner particles, wherein said toner particles comprise at least one polymer binder and at least one magnetic material, wherein said toner particles have a toner particle surface containing particles of positively chargeable inorganic fine powder particles, wherein: said inorganic fine powder particles having a mean volume average particle size of from about 0.5 to 7 &mgr;m, and a cleaning ratio of from about 0.3 to about 4.0; said cleaning ratio being the volume fraction of particles between 0 and 1.0 &mgr;m, divided by the volume fraction of particles greater than 1.0 &mgr;m; and the toner particles treated with a flowability improving agent having a BET surface area of at least about 30 m2/g.