IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To suppress friction amount reduction of a photoreceptor, while securing electrification uniformity in the repeated use of the photoreceptor. SOLUTION: An electrophotographic device comprises at least an electrification means, an exposure means, a development means, a transfer means and an electrophotographic photoreceptor. The electrification member used for the electrification means is a roller shaped electrification member arranged near to the photoreceptor. An image forming apparatus applies voltage superposing alternating-current voltage on direct-current voltage in the electrification member in a condition that a total amount of energy, having charge particles colliding the photoreceptor during electrification in an electrification nip, satisfies 1.4×10-4≤the total amount of energy having charge particles/photoreceptor circumferential length (J/m2mm)≤6.0×10-4, and has a mechanism for supplying an electrification hazard absorption agent to the surface of the photoreceptor. Electrification is performed under the condition that, from among the charge particles, the total amount of energy having the charge particles, having kinetic energy of 3×10-19(J) or larger, satisfies the total amount of energy of 1.2×10-4≤3×10-19(J) or larger, having charge particles/photoreceptor circumferential length of (J/m2mm)≤4.8×10-4. COPYRIGHT: (C)2005,JPO&NCIPI