Patent ID: 6863380

Claim:
Toner for use in an image forming apparatus comprising: a back electrode; a toner carrier which carries toner; and a toner transfer controlling means which is disposed between said toner carrier and said back electrode, wherein a first content of said toner electrified to a predetermined polarity is transferred toward said back electrode from said toner carrier through toner passing apertures which are formed in said toner transfer controlling means, and arrive at an image receiving member which is transported between said toner transfer controlling means and said back electrode to thereby form a toner image, wherein, a percentage of a second content of said toner is 10% or smaller than a count of total toner particles contained in said toner, wherein said second content of said toner is electrified to a polarity opposite to said predetermined polarity and has a toner particle diameter of d or larger, where d is a number mean diameter of said toner.