Patent Number: 8,818,239

Title: Image forming apparatus having transfer belt control

Abstract: An apparatus includes a belt member, a first image bearing member, a second image bearing member provided downstream of the first image bearing member, and a first steering roller provided upstream of the first image bearing member for controlling a widthwise position of the belt member by inclining at a position. In addition, a second steering roller is provided downstream of the second image bearing member and controls the widthwise position of the belt member, a first detecting member detects a widthwise position of the belt member on the first image bearing member, and a second detecting member detects a widthwise position of the belt member on the second image bearing member. A first control portion controls an inclination of the first steering roller on the basis of a detection result of the first detecting member, and a second control portion controls the second steering roller on the basis of a detection result of the first detecting member before a predetermined time and a current detection result of the second detecting member.

Inventors: Yamamoto; Shinji (Kawasaki, JP), Yoshida; Yasumi (Yokohama, JP), Matsumoto; Tadashi (Tokyo, JP), Hiratsuka; Takashi (Kawasaki, JP), Fukasaka; Toshihiro (Kawasaki, JP)

Assignee: Canon Kabushiki Kaisha

International Classification: G03G 15/00 (20060101); G03G 15/01 (20060101); G03G 15/08 (20060101)

Expiration Date: 8/26/12018