Patent ID: 8559840

Claim:
An image forming apparatus comprising: an image carrier configured to rotate in a predetermined direction; a correction image forming unit configured to form a plurality of correction images for correcting image forming conditions, on the image carrier in the predetermined direction; and a cleaning roller configured to clean the correction images on the image carrier, and wherein, with respect to all values ranging from 1 to an arbitrary value n, a positive integer N which satisfies the following expression for each value of n exists: ( T×N+L )/ n≦R/V ≦( T ×( N+ 1)− L )/ n where R represents a circumferential length of the cleaning roller, L represents a length of each of the correction images in a moving direction of the image carrier, T represents a formation interval of the correction images in the moving direction of the image carrier, V represents a ratio of a peripheral speed of the cleaning roller to a moving speed of the image carrier, and n is a positive integer.