Patent ID: 6519422
Filing Date: 2003-02-11
Classification: G03G,H04N

Abstract:
An image forming apparatus comprising:a plurality of image bearing members; contact charging means for charging a corresponding image bearing member of said plurality of image bearing members; exposure means for exposing a surface of said corresponding image bearing member to form a latent image; and developing means for developing the latent image with a toner to form a toner image, wherein the toner image formed on each of said plurality of image bearing members is successively transferred to a transfer medium, wherein said contact charging means comprises a magnetic brush charger including a magnetic rotary member and magnetic particles retained by a magnetic force of said magnetic rotary member, wherein each of said plurality of image bearing members is provided with a surface layer whose volume resistivity is in a range of 109 to 1014 &OHgr;Â·cm, and wherein a toner image for identifying the apparatus is formed on an image bearing member having a highest temperature among said plurality of image bearing members.