Patent ID: 8459637

Claim:
A sheet ejecting device for ejecting printed sheets to a stacker one by one, said sheet ejecting device comprising: a pair of ejection rollers; a strengthener, located in a sheet ejection route, for providing a force for a sheet; a bender, arranged downstream from the strengthener and capable of advancing into and retreating from the sheet ejection route, for canceling out the force provided for the sheet by the strengthener; a driver for moving the bender to advance into and retreat from the sheet ejection route; a sensor for detecting a currently ejected sheet; and a controller for controlling the driver based on a signal sent from the sensor so that the bender advances into the sheet ejection route after a leading edge of the currently ejected sheet comes into contact with a sheet that has already been ejected to a stacker and before a trailing edge of the currently ejected sheet passes through the pair of ejection rollers.