Paper discharging mechanism for an image processing apparatus

Abstract

A discharge mechanism capable of discharging a sheet facedown is advantageous to miniaturization of a duplex printing apparatus. The discharge mechanism includes a discharge roller gear engaged with a driving gear; a pair of discharge rollers rotatable by the discharge roller gear, keeping in contact with each other; a disklike support member having a shaft fixed on a same line of a shaft of the driving gear, intervening between the driving gear and the discharge rollers; a friction disk attached to the discharge roller gear, for transferring a driving force of the driving gear to the disklike support member; a compression coil spring interposed between the friction disk and the disklike support member, a shaft of a selected one of the discharge rollers passing through the compressing coil spring; and a solenoid for restricting rotation of the disklike support member when unactuated and for allowing rotation of the disklike support member when supplied with a current. The disklike support member has a pair of opposite stoppers formed at its outer circumference. Each of the stoppers has two opposite protrusions, one of which has a perpendicular outer wall, another of which has a slope.

Dependencies are inferred from the claim text.