The invention relates to a stacking device (10) for placing sheet-shaped elements (P) in stacks in a forming machine (1), said stacking device (10) comprising: a movable stacking surface (11), and an actuating device (12) for moving stacking surface (11): between a retracted position and a vertical forward position in a reciprocating back-and-forth motion for stacking sheets, and between the retracted position and a stowed position to open an access to the stack of sheet-shaped elements (P), characterized in that the actuator (12) comprises cam means configured to move the stacking surface (11) upwardly in the retracted position, in a raised position to be located above the top of the sheet stack.

The invention also relates to a machine forming sheet-shaped elements comprising at least one such stacking device.

In one example, a system can include a media pathway to transport a media into a stacking region, a clamp pathway to move a clamp along the clamp pathway, and a registration surface. The registration surface may be positioned between an edge of the media pathway and the clamp pathway.

A media registration system including an accumulation region and a transport track to receive and transport each media sheet of a series of media sheets forming a media job in a transport direction from an intake end to a registration end proximate to the accumulation region, and to stack the media sheets of the media job in the accumulation region to form a job stack. A translator adjusts a position of the registration end of the transport track in a direction lateral to the transport direction for each sheet to align edges of each sheet of the job stack in the lateral direction. A media sensor indicates a position of each sheet along the media path to facilitate a controller to determine an accumulation status of the job stack.

A paper stacking apparatus according to an embodiment of the present disclosure includes a stacking table, a first sensor, and a hardware processor. The stacking table includes an upper face on which papers are stacked, the stacking table being capable of being elevated and lowered by a drive mechanism. The first sensor is disposed at a first position and configured to detect the upper face of the stacking table or an upper face of stacked objects stacked on the stacking table. The hardware processor is coupled to the drive mechanism and the first sensor. The hardware processor is configured to determine that the stacking table is excessively elevated when an elapsed time after starting to detect the object by the first sensor is at least a first excessive-elevation determination value of time.

A delivery device for a sheet-processing machine, comprises at least one deposition station and a conveyer station, by the use of which, upstream-processed sheets of printed material can be picked up in a transfer location, and can be conveyed through the deposition station via a first conveying system, where they can be deposited optionally to form a stack, or can be conveyed beyond that stack. A holding device, which holds down the uppermost sheet of the stack during the transfer of a sheet to be conveyed against an entrainment or a lifting, is provided with one or with a plurality of holding assemblies which are spaced apart from each other transversely to the transport direction. A sheet-guiding element may be provided, which adjoins the deposition station and which is variable in its vertical position with at least its upstream end by the use of an actuating drive.

A medium stacking device includes an intermediate stacker that receives a medium treated by a treatment portion, and a first alignment member as an example of a contact portion, that is configured to move between a first position for performing an alignment operation on the medium on the intermediate stacker, and a second position that is separated further from the leading edge of the medium than is the first position. Furthermore, the medium stacking device is provided with a stacking portion that stacks the medium discharged from the intermediate stacker. The medium discharged from the intermediate stacker is stacked on the stacking portion after a leading edge contacts the first alignment member positioned at the second position.

In one example, a media puller device can include a snowplow device coupled to a first end of a hinge, a leading end of the media puller device coupled to a second end of the hinge, and a tension device coupled between the snowplow device and the media puller device.

A media registration system including an accumulation region and a transport track to receive and transport each media sheet of a series of media sheets forming a media job in a transport direction from an intake end to a registration end proximate to the accumulation region, and to stack the media sheets of the media job in the accumulation region to form a job stack. A translator adjusts a position of the registration end of the transport track in a direction lateral to the transport direction for each sheet to align edges of each sheet of the job stack in the lateral direction. A media sensor indicates a position of each sheet along the media path to facilitate a controller to determine an accumulation status of the job stack.

A sheet conveying device includes a tray, a conveyor, and a guide body. The tray is configured to stack a sheet. The conveyor is configured to convey the sheet to the tray. The guide body has a space, a height of the space being greater than a thickness of the sheet. The guide body is configured to guide the sheet conveyed by the conveyor, with a leading end of the sheet being inserted in the space. The guide body is configured to separate the sheet from the space, according to a difference of a sheet conveying speed of the conveyor and a moving speed of the guide body, and to stack the sheet on the tray.

A method for depositing wet printed sheets and forming a sheet stack in a delivery of a printing machine. An auxiliary stack which is separate from the sheet stack has sheet-shaped intermediate layers that are usable as moisture barriers in the sheet stack. A plurality of sheets are stacked on top of one another to form a first section of the sheet stack. Then an intermediate layer is moved from the auxiliary stack onto the section of the sheet stack. A plurality of sheets are stacked on top of one another and on the intermediate layer to form a further section. The intermediate layer is thus arranged in the sheet stack between the first section and the further section. The placement of the intermediate layers provides a way of reducing or even eliminating quality losses in sheets and/or sheet stacks caused by moisture and moisture exchange.