Patent ID: 7532854

Claim:
An image forming apparatus comprising: a print unit which prints an image on a document; discharging rollers which discharge the printed document into a discharge tray; a sensor unit which senses a trailing edge of the document; a decelerating unit which decelerates the discharging rollers; a step motor which rotates the discharging rollers; and a control unit which stores predetermined periods of delay time for double-sided and single-sided printing and controls the decelerating unit to control a rotational speed of the step motor to decelerate the discharging rollers after the corresponding stored predetermined period of delay time subsequent to the sensor unit sensing a trailing edge of the document according to whether the double-sided or the single-sided printing is performed on the document, wherein the predetermined period of delay time for double-sided printing is shorter than the predetermined period of delay time for single-sided printing.