Abstract: A medium transport device includes a feed roller pair, a stack portion that receives a medium transported by the feed roller pair between a support surface for supporting the medium in an inclined posture in which a downstream side in a transport direction is directed downward and an opposing surface opposing the support surface and stacks the medium, an alignment portion that aligns a downstream end of the medium stacked in the stack portion, and a control unit that controls a distance between the support surface and the opposing surface, in which the stack portion is configured to be capable of changing the distance and the control unit adjusts the distance according to a condition.

Abstract: A stapling apparatus including a holding portion that receives and holds a plurality of mediums, a first matching portion positioned downstream of the holding portion, a paddle that applies sending force to the mediums so that leading edge sides of the mediums reach the first matching portion, a stapler that binds the mediums, the leading edge sides of the mediums having been matched by the first matching portion, a folding mechanism portion that folds the mediums that have been bound by the stapler. In the stapling apparatus, the first matching portion is configured to move and is configured to transport the mediums to a performing position of the stapler and a performing position of the folding mechanism portion by moving, and a position where the paddle applies sending force to the mediums differs according to lengths of the mediums in a transport direction.

Abstract: A medium transport device includes a feeding unit that transports a medium, a stack portion that receives the medium transported by the feeding unit between a support surface for supporting the medium in an inclined posture in which a downstream side in a transport direction is directed downward and an opposing surface opposing the support surface and stacks the medium, an alignment portion that aligns a downstream end of the medium stacked in the stack portion, a paddle that is provided between the feeding unit and the alignment portion in the transport direction and moves the medium toward the alignment portion by rotating while being in contact with the medium, and a control unit that controls an operation of the paddle, in which the control unit controls the operation of the paddle according to a condition.

Abstract: Provided is a medium processing device including a supply portion supplying a medium, a transporter transporting the medium supplied from the supply portion, an contact portion that a tip of the medium transported by the transporter is brought into contact with, a stacker in which the medium brought into contact with the contact portion is stacked, and a processor processing the medium stacked in the stacker, in which the transporter includes a gripper that is configured to move along a transport path of the medium, grips a tip of the medium, and moves.