Patent ID: 8626041
Filing Date: 2014-01-07
Classification: G03G

Abstract:
1. An image forming apparatus including an image carrier, an exposure unit that forms an electrostatic latent image by exposing a surface of the image carrier based on image data, a developing unit that develops the electrostatic latent image formed on the image carrier with a developing material, and an intermediate transfer member onto which a developing material image developed by the developing unit is transferred, the apparatus comprising: a first detection unit that detects a speed of a surface of the intermediate transfer member at a transfer position where the developing material image is transferred from the image carrier to the intermediate transfer member; a first control unit that controls driving of the intermediate transfer member based on a result of the detection by said first detection unit so as to make the speed of the surface of the intermediate transfer member at the transfer position close to a predetermined target speed; a second detection unit that detects a speed of the surface of the image carrier at the transfer position; a second control unit that controls driving of the image carrier based on a result of the detection by said second detection unit so as to make the speed of the surface of the image carrier at the transfer position close to the same speed as the speed of the surface of the intermediate transfer member at the transfer position; a third detection unit that detects a speed of the surface of the image carrier at an exposure position where the image carrier is exposed by the exposure unit; and a third control unit that controls a timing of exposure by the exposure unit based on a result of the detection by said third detection unit so as to make an interval to expose the image carrier by the exposure unit in a sub-scanning direction, close to a constant interval.