Patent ID: 7546053

Claim:
An image forming apparatus for discharging a sheet from a discharge port to a sheet tray, comprising: a main unit provided with a discharge port and movably provided with a sheet tray to hold the sheet discharged from the discharge port; a drive unit to start movement of the sheet tray toward a position of the discharge port on the basis of an instruction of image forming start; and an image forming unit to compare sheet tray movement time which is time required for the sheet tray to reach the discharge port by the drive unit with image formation processing time which is time of an image forming process performed before discharging the sheet from the discharge port and when the sheet tray movement time does not exceed the image formation processing time, to start the image forming process, wherein the image forming unit, when the sheet tray movement time exceeds the image formation processing time, at a place closest to the discharge port, stops the sheet until a predetermined condition is satisfied.