Patent ID: 8078075

Claim:
An image forming apparatus, comprising: a case; a printing medium feeding unit disposed in the case to feed printing media; an image forming unit disposed in the case to form images on the printing media fed from the printing medium feeding unit using developer, and including a first portion to be stained and a second portion to be stained different than the first portion, each of the first and second portions becoming stained when the images are formed; and a control portion to control the image forming unit to form the images in a plurality of print modes, the control portion to send a first cleaning command to clean the first stained portion when the amount of the developer used by the image forming unit reaches a first reference amount of the developer corresponding to the first stained portion or when the number of the printing media supplied by the printing medium feeding unit reaches a first reference value of the number of the printing media corresponding to the first stained portion, the control portion to send a second cleaning command to clean the second stained portion when the amount of the developer used by the image forming unit reaches a second reference amount of the developer corresponding to the second stained portion or when the number of the printing media supplied by the printing medium feeding unit reaches a second reference value of the number of the printing media corresponding to the second stained portion.