IMAGE FORMING APPARATUS, PROCESSING CARTRIDGE, AND ELECTROSTATIC CHARGE BIAS VOLTAGE CONTROL PROCESS

摘要

PROBLEM TO BE SOLVED: To refresh a latent image carrier surface by removing foreign matters adhered to the latent image carrier surface in previous rotation, in an image forming apparatus for superposing and applying an alternating current field and a direct current field on electrification voltage of a latent image carrier. SOLUTION: The image forming apparatus indicates that a discharge current valueδa per a unit area in part of a rotation process isδa≥2,600[μA×sec/m2], a discharge current valueδb per a unit area in a printing process isδb≥1,200[μA×sec/m2], and the relation ofδa>δb betweenδa andδb is satisfied. COPYRIGHT: (C)2004,JPO&NCIPI