Patent ID: 9122223
Filing Date: 2015-09-01
Classification: G03G

Abstract:
1. A driving apparatus comprising: a plurality of image bearing bodies each of which is rotatable and capable of bearing a latent image and a developer image; a belt provided so as to face the image bearing bodies, the belt being rotatable; a plurality of image-bearing-body-driving units for rotating the image bearing bodies; a belt driving unit for rotating the belt; and a control unit for controlling the image-bearing-body-driving units and the belt driving unit, wherein the control unit causes the image-bearing-body-driving units and the belt driving unit to start rotating the image bearing bodies and the belt so that the image bearing bodies and the belt rotate at a first speed, wherein when the control unit detects that the image bearing bodies and the belt rotate at the first speed, the control unit causes the image-bearing-body-driving units and the belt driving unit to accelerate rotation speeds of the image bearing bodies and the belt to a second speed faster than the first speed; and wherein the control unit sets an intermediate speed faster than the first speed and slower than the second speed, while the control unit causes the image-bearing-body-driving units and the belt driving unit to accelerate rotation speeds of the image bearing bodies and the belt to the second speed; wherein the intermediate speed includes a first intermediate speed for at least one of the image-bearing-body-driving units and a second intermediate speed for the belt which is different from the first intermediate speed, and wherein the control unit sets the first intermediate speed and the second intermediate speed at different times.