A sheet post-processing device for post-processing of a recording sheet ejected from an image forming device in an ejection direction, the sheet post-processing device including: a first tray on which the recording sheet is placed after ejection; a push-out member that pushes out, in a push-out direction different from the ejection direction, the recording sheet placed on the first tray; and a guide member adjacent to an ejection direction downstream end of the first tray, the guide member supporting a portion of the recording sheet that protrudes from the first tray in the ejection direction. The guide member includes a resistive force reduction unit that reduces a resistive force that occurs due to contact between the guide member and the recording sheet, the resistive force hindering the pushing out of the recording sheet when the push-out member pushes out the recording sheet.

A sheet post-processing apparatus includes a processing tray, a shift member, a discharge tray, a discharge roller pair, and a pressing member. The shift member moves a sheet loaded on the processing tray in a sheet width direction. The discharge roller pair discharges a sheet on the processing tray onto the discharge tray. The pressing member presses down a sheet discharged onto the discharge tray. The pressing member has an arm portion which rotates in the sheet conveyance direction about a rotation fulcrum, and a roller which is attached to the arm portion to be rotatable in the sheet width direction, and the pressing member is selectively disposed in a first position where the roller presses down the upstream-side end part of a sheet discharged onto the discharge tray, or in a second position where the roller contacts a lower surface of a sheet on the processing tray.

A sheet post-processing apparatus includes a processing tray, a shift member, a discharge tray, a discharge roller pair, and a pressing member. The shift member moves a sheet loaded on the processing tray in a sheet width direction. The discharge roller pair discharges a sheet on the processing tray onto the discharge tray. The pressing member presses down a sheet discharged onto the discharge tray. The pressing member has an arm portion which rotates in the sheet conveyance direction about a rotation fulcrum, and a roller which is attached to the arm portion to be rotatable in the sheet width direction, and the pressing member is selectively disposed in a first position where the roller presses down the upstream-side end part of a sheet discharged onto the discharge tray, or in a second position where the roller contacts a lower surface of a sheet on the processing tray.

A shrink conveyor and a method are provided for allowing shrink in a continuous strip. The shrink conveyor comprises a plurality of rollers, a frame that defines a plurality of roller positions, and a first drive member for driving the plurality of rollers. Each roller of the plurality of rollers comprises a first driven part that has a first drive profile that tapers. The first drive member is arranged for rotating the plurality of rollers through contact with the first driven parts at a rotation speed in a transmission ratio to the speed of the first drive member in such a way that the first drive member contacts the first driven part of each roller of the at least three rollers at a different diameter for each roller.

A shrink conveyor and a method are provided for allowing shrink in a continuous strip, wherein the shrink conveyor comprises a plurality of rollers, a frame that defines a plurality of roller positions and a first drive member for driving the plurality of rollers, wherein each roller of the plurality of rollers comprises a first driven part that has a first drive profile that tapers, wherein the first drive member is arranged for rotating the plurality of rollers through contact with said first driven parts at a rotation speed in a transmission ratio to the speed of the first drive member in such a way that the first drive member contacts the first driven part of each roller of the at least three rollers at a different diameter for each roller.