A medium discharging device includes a side cursor, a moving unit, a discharge unit, and a side guide. The side cursor is provided in a processing tray and is provided movable in an intersecting direction intersecting a discharging direction of the medium, aligns an end portion of a media bundle in the intersecting direction, and guides the media bundle in the discharging direction when the media bundle is discharged. The moving unit moves the side cursor in the intersecting direction. The discharge unit discharges the media bundle from the processing tray to the discharge tray where the media bundle is placed. When the media bundle is discharged, the side guide is disposed alongside the side cursor in the discharging direction and restricts movement of the media bundle in the intersecting direction, which is discharged by the discharger.

A device for offsetting sheets as they are conveyed in a paper path toward a stacker includes a narrow channel mounted to a set of linked arms which when moved in a process direction (upstream-downstream) articulate in a cross process direction (inboard-outboard) to register the sheets at various locations for stacking or finish processing. The linked arms keep the channel parallel to the paper path at all times regardless of inboard-outboard offset.

A device for offsetting sheets as they are conveyed in a paper path toward a stacker includes a narrow channel mounted to a set of linked arms which when moved in a process direction (upstream-downstream) articulate in a cross process direction (inboard-outboard) to register the sheets at various locations for stacking or finish processing. The linked arms keep the channel parallel to the paper path at all times regardless of inboard-outboard offset.

A sheet discharge device includes at least one sheet discharge tray, a sheet discharge position adjustment actuator, and a controller. The sheet discharge tray receives discharged sheets. The discharge position adjustment actuator adjusts discharge positions of the discharged sheets on the at least one sheet discharge tray. The controller compares a first rotation amount of first print data printed on a first sheet with a second rotation amount of second print data printed on a second sheet. In response to a determination that the first rotation amount is different than the second rotation amount, the controller controls the sheet discharge position adjustment actuator to (a) discharge the first sheet to a first discharge position and (b) discharge the second sheet to a second discharge position different than the first discharge position.

The present application discloses a post-processing apparatus which performs a predetermined process after an image formation process performed by an image formation apparatus. The post-processing apparatus includes an ejection tray, which supports a sheet stack, in which sheets are stacked, and a curl prevention portion including a first tray cursor, which abuts an upper surface of the sheet stack on the ejection tray to prevent the sheet stack from curling. The curl prevention portion includes an angle changer, which changes an inclination angle of the first tray cursor with respect to the ejection tray. The angle changer sets the inclination angle to a first value when a number of sheets is a first number. The angle changer sets the inclination angle to a second value different from the first value when the number of the sheets is a second number different from the first number.

The present application discloses a post-processing apparatus which performs a predetermined process after an image formation process performed by an image formation apparatus. The post-processing apparatus includes an ejection tray, which supports a sheet stack, in which sheets are stacked, and a curl prevention portion including a first tray cursor, which abuts an upper surface of the sheet stack on the ejection tray to prevent the sheet stack from curling. The curl prevention portion includes an angle changer, which changes an inclination angle of the first tray cursor with respect to the ejection tray. The angle changer sets the inclination angle to a first value when a number of sheets is a first number. The angle changer sets the inclination angle to a second value different from the first value when the number of the sheets is a second number different from the first number.

A sheet conveyance apparatus includes a first conveyance path, a detection portion, a second conveyance path, a discharge unit, and a controller. The discharge unit is movable in a width direction and is configured to perform a discharge operation of discharging a sheet onto a first discharge portion and a reversing operation of reversing and conveying the sheet to the second conveyance path. The controller is configured to control the discharge unit and to execute a first alignment control when the reversing operation is performed. The first alignment control is a control in which the discharge unit moves the sheet in the width direction based on a position of the sheet detected by the detection portion to align the sheet at a target position.

A sheet stacker includes a sheet ejector, a sheet stack portion, and air blowers. The sheet ejector ejects a sheet. The sheet stack portion stacks the sheet ejected by the sheet ejector. The air blowers blow air from blow ports toward the sheet ejected from the sheet ejector. Each of the air blowers includes an air generator, an air guide, a first blow portion, a second blow portion, and a switcher. The air generator generates the air. The air guide guides the air to each of the blow ports. The first blow portion blows the air toward the sheet. The second blow portion blows the air in a direction different from a direction in which the first blow portion blows the air. The switcher performs switching so that the air guide guides the air to one of the first blow portion and the second blow portion.

An image printing apparatus includes a print unit, a tray moving unit that moves a tray for receiving a print medium discharged in a first direction, in a second direction crossing the first direction, a lever moving unit that moves a lever that contacts to the print medium stacked on the tray and is rotatable according to an amount of stacking between a first position at which the lever is contactable to the stacked print medium and a second position at which the lever is separated from the stacked print medium. A control unit causes the tray moving unit to move the tray in the second direction in a state in which the control unit has caused the lever moving unit to move the lever to the second position.

An image printing apparatus includes a print unit, a tray moving unit that moves a tray for receiving a print medium discharged in a first direction, in a second direction crossing the first direction, a lever moving unit that moves a lever that contacts to the print medium stacked on the tray and is rotatable according to an amount of stacking between a first position at which the lever is contactable to the stacked print medium and a second position at which the lever is separated from the stacked print medium. A control unit causes the tray moving unit to move the tray in the second direction in a state in which the control unit has caused the lever moving unit to move the lever to the second position.