Patent Number: 7,043,170

Title: Image forming apparatus having speed control of primary and secondary image transfers

Abstract: An image-forming apparatus includes a rotatable photoreceptor carrying a toner image thereon, a rotatable intermediate transfer member, a primary transfer device facilitating primary transfer of the toner image from the photoreceptor onto the intermediate transfer member, a secondary transfer device facilitating secondary transfer of the toner image from the intermediate transfer member onto a sheet, and a controller controlling rotation speed of the intermediate transfer member. The controller sets the rotation speed at a first speed during primary transfer. After primary transfer and a delay period, the controller changes the rotation speed to a second speed. The controller determines which rotation of the intermediate transfer member to change the speed.

Inventors: Ono; Toru (Tokyo, JP), Takata; Shinichi (Tokyo, JP), Hamano; Shigemichi (Tokyo, JP), Sato; Akihiko (Tokyo, JP), Morita; Kenji (Tokyo, JP), Oka; Yushi (Tokyo, JP)

Assignee: Canon Kabushiki Kaisha

International Classification: G03G 15/00 (20060101)

Expiration Date: 5/09/02018