Patent ID: 7469991

Claim:
An image forming apparatus comprising: an image former that includes a plurality of photoconductors for forming a plurality of color images and includes a belt on which the plurality of the color images are transferred; and a controller configured to perform a color shift correction for color printing when a number of printings formed by the image former reaches a predetermined value, the color shift correction serving to correct a color shift where the plurality of the color images are shifted on the belt, the controller being further configured to perform the color shift correction when the number of printings formed by the image former reaches another value, the another value being smaller than the predetermined value, wherein, when the number of printings formed by the image former reaches the another value, the controller determines whether the image forming apparatus is on standby and whether a predetermined time period has elapsed after completion of the last print job, and the controller performs the color shift correction when it is determined that the image forming apparatus is on standby and that a predetermined time period has elapsed after completion of the last print job.