A handoff mechanism for use with a media stacker of a media production apparatus comprises a plurality of kicker units (101) arranged across a width of the handoff mechanism. A common drive mechanism (103) is provided to move the plurality of kicker units (101) between a closed position and an open position. Each kicker unit (101), when in the closed position during use, applies a pressure to any media sheets that are already stacked in a stacker tray (105) while a new media sheet is being fed to the stacker tray. The pressure provided by each kicker unit (101) is independent of the pressure provided by the other kicker units.

A handoff mechanism for use with a media stacker of a media production apparatus comprises a plurality of kicker units (101) arranged across a width of the handoff mechanism. A common drive mechanism (103) is provided to move the plurality of kicker units (101) between a closed position and an open position. Each kicker unit (101), when in the closed position during use, applies a pressure to any media sheets that are already stacked in a stacker tray (105) while a new media sheet is being fed to the stacker tray. The pressure provided by each kicker unit (101) is independent of the pressure provided by the other kicker units.

A stacking device for stacking substrates includes: a frame; an input region; an output region; and at least one conveying element mounted on the frame so as to be completely rotatable about an axis of rotation. The at least one conveying element has a gripping portion for conveying a substrate located in the input region to the output region.

A stacking device for stacking substrates includes: a frame; an input region; an output region; and at least one conveying element mounted on the frame so as to be completely rotatable about an axis of rotation. The at least one conveying element has a gripping portion for conveying a substrate located in the input region to the output region.