A sheet suction device includes a sheet carrier, a suction unit, and a rotary body. The sheet carrier has a carrying region. The carrying region includes a plurality of suction openings. The sheet carrier is configured to rotate while holding a sheet. The suction unit is configured to communicate with the plurality of suction openings and suck air via the plurality of suction openings. The rotary body is disposed between the plurality of suction openings and the suction unit. The rotary body is configured to rotate to change a number of suction openings that communicate with the suction unit, among the plurality of suction openings of the sheet carrier.

A sheet suction device includes a sheet bearer having a plurality of suction holes, a suction unit, a first member, and a second member. The first member has grooves arranged in a radial direction, and each of the grooves extends in a circumferential direction. The second member has a plurality of hole rows including a plurality of holes. The plurality of holes in each of the plurality of hole rows is arranged in the circumferential direction, and the plurality of hole rows is arranged in the radial direction. When the first member rotates with respect to the second member, the number of holes communicating with the grooves is changed to change the number of the plurality of suction holes communicating with the suction unit. The plurality of holes includes two or more holes that simultaneously communicate with the suction unit when the first member rotates by a unit rotation amount.

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 device for overlapping sheets includes at least one blower box and a supply table. Multiple sheets are guided into a region of the blower box consecutively, in the same transport direction, and are arranged at a distance from one another on the supply table. A blower nozzle is arranged in the blower box, on the side thereof facing the supply table. A blowing direction of the blower nozzle is oriented and parallel to the supply table and against the transport direction of the sheets. The supply table is arranged below the blower box and multiple blower nozzles are arranged in the blower box, one after the other, in the transport direction of the sheets, on the side thereof facing the supply table. A respective blowing direction of the blower nozzles is oriented in parallel to the supply table, and against the transport direction of the sheets.

A medium transporting device and a liquid jetting device, which can suppress the lifting of both ends of a medium in a width direction of a medium and can suppress the occurrence of wrinkling of the medium, are provided. The medium transporting device includes a gripping unit that grips a leading end region of a medium, a medium supporting unit that has a first adsorption supporting unit which adsorbs and supports a trailing end region of the medium and a second adsorption supporting unit which adsorbs a non-end region of the medium and generates an adsorption pressure less than an adsorption pressure generated by the first adsorption supporting unit, a medium position moving unit that moves a position in a medium width direction in the medium width direction, and a medium transporting unit that transports the medium. Regarding the width direction, the first adsorption supporting unit has a length, which is obtained by adding a length twice a moving distance of the medium to a medium length, and a distance from a center position in the width direction to one end in the width direction is the same as a distance from the center position in the width direction to the other end in the width direction.

A sheet conveying device includes a conveying body, a pressing body, and an attracting device. The conveying body conveys a sheet. The pressing body presses the sheet to a circumferential surface of the conveying body at an upstream side from an operation start position at which an operation with respect to the sheet starts, in a sheet conveying direction. The attracting device sucks and attracts the sheet onto the conveying body. The attracting device includes an attracting unit having an attracting region extending shorter than a distance between the pressing body and the operation start position. The attracting unit rotate together with the conveying body.

A substrate support system 10 for a conveyor printer is provided, comprising a support unit 100 comprising a plurality of vacuum apertures 108 arranged for fluidic communication with a source of negative pressure. The support unit 100 also comprises at least one air bearing 114 arranged for fluidic communication with a source of positive pressure. The air bearing 114 comprises porous media 116. The substrate support system 10 also comprises a conveyor belt 150 arranged over the support unit 100 for supporting a substrate 170 to be printed on. The conveyor belt 150 comprises a plurality of belt apertures. The vacuum apertures 108 are arranged to convey a negative pressure through the belt apertures for retaining the substrate 170 on the conveyor belt 150. The at least one air bearing 114 is arranged to convey a positive pressure to support the conveyor belt 150.

A sheet suction device includes a drum having multiple suction ports in a circumferential surface of the drum, the drum configured to bear a sheet on the circumferential surface and rotate in a circumferential direction of the drum, and a suction device configured to suck the sheet through the multiple suction ports to attract the sheet on the circumferential surface. The drum includes multiple suction regions aligned in the circumferential direction on the circumferential surface, each of the multiple suction regions includes the multiple suction ports aligned in the circumferential direction and in an axial direction of the drum on the circumferential surface, the multiple suction regions include an upstream region, a middle region, and a downstream region in the circumferential direction, and the middle region has the multiple suction ports at both outer sides in the axial direction of the drum.

A paper feeding apparatus for feeding paper from a paper-mounting table on which a paper bundle is mounted includes a suctioning conveyor that suctions and conveys uppermost paper among the paper bundle mounted on the paper-mounting table; and a hardware processor that controls the suctioning conveyor, wherein the suctioning conveyor includes a suction region for suctioning paper in a paper width direction orthogonal to a paper conveyance direction, and the hardware processor controls distribution of a suction amount in the paper width direction based on stiffness and a paper width, which is a paper size in the paper width direction, of paper.

A printing system comprises an ink deposition assembly and a media transport assembly. The ink deposition assembly comprises a printhead arranged to eject a print fluid to a deposition region of the ink deposition assembly. The media transport assembly comprises a vacuum source and a movable support surface. The movable support surface comprises valves having holes through the media support surface. The media transport assembly is configured to hold one or more print media against the movable support surface by vacuum suction communicated from the vacuum source through valves. The valves are each configured to transition between a closed state in which airflow through the hole of the respective valve is prevented and an open state in which airflow through the hole of the respective valve is allowed.