The present application relates to a device for conveying flat pieces. The device comprises a belt with a transport surface, wherein the belt is movable along a transport axis; a support element with a support surface for supporting the belt; and a vacuum supply for providing vacuum suction; wherein a suction distributing structure at the support surface of the support element is in fluid connection with the vacuum supply; and wherein the suction distributing structure has a belt suction region and a card suction region, wherein the belt suction region is configured to provide suction to the belt and the card suction region is configured to provide suction to flat pieces on the transport surface of the belt. The present application also relates to a system for treating flat pieces, the system comprising a treatment device, for example a print head.

The invention provides a fiber product suction system, comprising a folding wheel and a plurality of valves. The folding wheel comprises a plurality of protruding wheels and a plurality of recessing wheels adjacent each other. A plurality of suction channels and at least one connecting channel are disposed within the protruding wheel, wherein the connecting channel is fluidly connected to the suction channel. The valve is disposed on the recessing wheel of the folding wheel, and includes a connecting opening, a valve channel and a plurality of valve openings, wherein the valve openings are disposed on two sides of the valve, and are fluidly connected to the connecting opening via the valve channel. An air extractor can extract the gas in each suction channel through the valve, and generate a negative pressure on part of suction channels of the protruding wheel, so that the fiber product suction system can be used to suck and fold paper.

A sheet suction device includes a bearing member configured to bear a sheet on a circumferential surface of the bearing member and rotate in a first direction, a plurality of suction holes in a bearing region in the circumferential surface of the bearing member, a suction device connected to the plurality of suction holes, the suction device configured to suck the sheet through the plurality of suction holes, and a first member between the plurality of suction holes and the suction device, the first member rotatable in a second direction different from the first direction to change a suction region of the suction device connected to the plurality of suction holes. A rotation of the first member in the second direction expands the suction region of the suction device in the bearing region of the bearing member.

A sheet suction device includes a drum including multiple suction holes in a circumferential surface of the drum, the drum configured to bear a sheet on the circumferential surface and rotate, a suction device configured to suck the sheet through the multiple suction holes, a rotary valve between the multiple suction holes of the drum and the suction device, the rotary valve configured to rotate relative to the drum to change a number of the multiple suction holes communicating with the suction device, and a driver configured to relatively rotate the drum and the rotary valve.

A sheet suction device includes a drum including multiple suction holes in a circumferential surface of the drum, the drum configured to bear a sheet on the circumferential surface and rotate, a suction device configured to suck the sheet through the multiple suction holes, a rotary valve between the multiple suction holes of the drum and the suction device, the rotary valve configured to rotate relative to the drum to change a number of the multiple suction holes communicating with the suction device, and a driver configured to relatively rotate the drum and the rotary valve.

The present application relates to a device for conveying flat pieces. The device comprises a belt with a transport surface, wherein the belt is movable along a transport axis; a support element with a support surface for supporting the belt; and a vacuum supply for providing vacuum suction; wherein a suction distributing structure at the support surface of the support element is in fluid connection with the vacuum supply; and wherein the suction distributing structure has a belt suction region and a card suction region, wherein the belt suction region is configured to provide suction to the belt and the card suction region is configured to provide suction to flat pieces on the transport surface of the belt. The present application also relates to a system for treating flat pieces, the system comprising a treatment device, for example a print head.

An inkjet printing machine for printing individual sheets comprises at least one printing station and a transport system (100) for transporting the individual sheets through the printing station, along a transport direction. The transport system (100) comprises at least one gripper conveyor (150) movable along the transport direction, for gripping one of the individual sheets defining a sheet position in transport direction. The transport system (100) further comprises at least one support conveyor (190) movable along the transport direction for supporting a region of the individual sheet, wherein the supported individual sheet and the support conveyor (190) are movable along the transport direction with respect to each other. The printing machine allows for efficient and flexible handling of individual sheets, in particular large format sheets of materials such as corrugated cardboard or other materials that have a certain degree of inherent stability.

An inkjet printing machine for printing individual sheets comprises at least one printing station and a transport system (100) for transporting the individual sheets through the printing station, along a transport direction. The transport system (100) comprises at least one gripper conveyor (150) movable along the transport direction, for gripping one of the individual sheets defining a sheet position in transport direction. The transport system (100) further comprises at least one support conveyor (190) movable along the transport direction for supporting a region of the individual sheet, wherein the supported individual sheet and the support conveyor (190) are movable along the transport direction with respect to each other. The printing machine allows for efficient and flexible handling of individual sheets, in particular large format sheets of materials such as corrugated cardboard or other materials that have a certain degree of inherent stability.

A machine for processing individual sheets comprises at least one processing station, in particular in inkjet printing station, and a transport system (100) for transporting the individual sheets through the processing station, along a transport direction. The transport system (100) comprises at least one gripper conveyor (150) movable along the transport direction, for gripping one of the individual sheets defining a sheet position in transport direction. The transport system (100) further comprises at least one support conveyor (190) movable along the transport direction for supporting a region of the individual sheet, wherein the support conveyor (190) comprises a vacuum system for supporting the individual sheet on an interacting surface of the support conveyor, the vacuum system comprising a plurality of orifices in the interacting surface. The machine allows for efficient and flexible handling of individual sheets, in particular large format sheets of materials such as corrugated cardboard or other materials that have a certain degree of inherent stability.

A sheet suction device includes a sheet bearer having a plurality of suction holes on a plurality of bearing areas, a rotational portion having a plurality of holes that is connectable to the plurality of suction holes, a suction unit configured to suck air via the plurality of holes of the rotational portion. The sheet bearer bears a plurality of sheets on the plurality of bearing areas of the circumferential surface of the sheet bearer and rotates. The rotational portion rotates in a same cycle of the sheet bearer. The sheet suction device further includes a switching unit that switches combinations of whether or not to suck the air among the plurality of bearing areas of the sheet bearer according to a phase of rotation of the sheet bearer or the rotational portion.