An automated media sheet processing system for automated collating, stacking and transferring media sheets exiting a media source includes a dynamically oriented baffle having a plurality of stepped bins. Each stepped bin is slidingly arranged adjacent another stepped bin, with the stepped bins configured to receive media sheets and allow them to fall onto and accumulate on the stepped bins. The stepped bins may move and change orientation into a stair configuration descending in different directions. An automated reciprocating pusher may move in the different directions orthogonally to the stepped bins to move and collate the media sheets into collated stacks downstream the stepped bins on different or opposite sides of the dynamically oriented baffle, with no reset or extraneous movement needed between reciprocating pushes. No reset is needed because the reciprocating pusher ends a first push in position to start a next push to the opposite side.

An automated media sheet processing system for automated collating, stacking and transferring media sheets exiting a media source includes a dynamically oriented baffle having a plurality of stepped bins. Each stepped bin is slidingly arranged adjacent another stepped bin, with the stepped bins configured to receive media sheets and allow them to fall onto and accumulate on the stepped bins. The stepped bins may move and change orientation into a stair configuration descending in different directions. An automated reciprocating pusher may move in the different directions orthogonally to the stepped bins to move and collate the media sheets into collated stacks downstream the stepped bins on different or opposite sides of the dynamically oriented baffle, with no reset or extraneous movement needed between reciprocating pushes. No reset is needed because the reciprocating pusher ends a first push in position to start a next push to the opposite side.

A sheet post-processing apparatus successively performs: a control in a first mode to move a pair of side end cursors to respective first positions where edges of the side end cursors facing a tray come into contact with an ejected sheet above and away from the tray and move the side end cursors to respective holding positions located inwardly of the sheet in a width direction; and a control in a second mode to move the side end cursors to respective lateral positions located outwardly of the sheet in the width direction, move the side end cursors to respective second positions where the edges of the side end cursors facing the tray come close to or into contact with the tray, and move the side end cursors from the lateral positions to respective abutment positions where the side end cursors abut against ends of the sheet in the width direction.