Patent Number: 8,577,235

Title: Image forming apparatus featuring control voltages applied to magnetic particle carrying members

Abstract: An image forming apparatus includes a rotatable drum, a charging section for charging the drum, a latent image forming section, a potential detector, a phase detector, and a controller. The charging section includes a first carrying member and a second carrying member for carrying electroconductive magnetic particles. The second carrying member is disposed downstream of said first carrying member. The latent image forming section forms a latent image on the drum, and is disposed downstream of the charging section. The potential detector detects a surface potential of the drum, and is disposed downstream of the charging section. The phase detector detects information relating to a rotational phase of the second carrying member. The controller controls voltages applied to the first carrying member and to the second carrying member, on the basis of a result of detection by the potential detector and a result of detection by the phase detector.

Inventors: Matsumoto; Ryota (Yokohama, JP), Hong; Yukwi (Hiratsuka, JP), Horita; Shingo (Tokyo, JP), Hashimoto; Koichi (Yokohama, JP)

Assignee: Canon Kabushiki Kaisha

International Classification: G03G 15/02 (20060101)

Expiration Date: 1/05/12017