Patent ID: 8559043

Claim:
A paper output device comprising: a paper output tray configured in such a manner that a sheet of paper having undergone a predetermined process is outputted thereon; an actuator supported in such a manner as to be swingable above a paper loading surface of the paper output tray, the actuator being configured in such a manner as to be displaced upward by a force acting thereon from an uppermost sheet of paper as a position of the uppermost sheet of paper on the paper output tray rises; and a fullness determination section that determines that the sheets of paper on the paper loading surface of the paper output tray have reached a state of fullness upon detecting that the actuator has been displaced to a predetermined height by the uppermost sheet of paper on the paper output tray, wherein the actuator at least includes: a fullness detection section disposed at a tip portion thereof and configured so as to be in contact with the uppermost sheet of paper on the paper output tray; and a rear edge curling detection section formed so as to extend from the fullness detection section toward a direction that gets further away from the paper loading surface of the paper output tray when viewed toward a direction that is generally parallel to the paper loading surface of the paper output tray and is opposite to a paper conveying direction.