A vacuum system for securing substrates is provided, having a suction line, the conveyor belt configured to receive and transport at least one substrate, wherein the conveyor belt is provided with a plurality of perforations, wherein the vacuum system is configured to produce fluid suction through the perforations towards the interior of the suction line, generating a securing force of the at least one substrate to the conveyor belt. The invention is characterized in that each perforation is equipped with a valve which allows the opening and closing of the perforation, allowing and impeding, respectively, the passage of a fluid flow through the perforation.

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 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 belt conveyance device includes an endless belt, a duct having a suction port, and a rectifier inside the duct. The duct is surrounded by an inner circumferential surface of the endless belt. The rectifier extends in a width direction of the endless belt perpendicular to a direction of conveyance by the endless belt.

The present invention relates to an inversion transfer module (60) for a converting machine having a printing module (16) comprising a first printing unit (17) arranged to print on a top side (S1) of the sheet (1), and a second printing unit (17) arranged to print a bottom side (S2) of the sheet. The inversion transfer module is arranged between the first printing unit and the second printing unit and comprises a first inversion vacuum transfer (62) arranged to contact the first side of the sheet and a second inversion vacuum transfer (64) configured to contact the second side of the sheet, whereby the inversion transfer module is configured to change the side of adherence and transportation of the sheet.

A suction device includes a suction hole member including a plurality of suction holes, a suction pump connected to each of the plurality of suction holes, the suction pump configured to suction an air through the plurality of suction holes of the suction hole member to suction a suction target to the suction hole member, and a suction state detector configured to detect a suction state of at least one of the plurality of suction holes corresponding to an end of the suction target suctioned to the suction hole member.

Provided are a medium conveying device and an inkjet printer that can convey a medium stably. In a case where a paper P is conveyed along a plane in a conveying unit 40, a posture of the paper P is corrected by a posture correction unit 20, and then the paper P is delivered to the conveying unit 40 by a delivery unit 30. The delivery unit 30 holds a leading end portion of the paper P of which the posture is corrected by the posture correction unit 2 with a paper holding bar 31, and delivers the paper P to the conveying unit 40 by moving the paper holding bar 31 linearly along a conveying direction of the paper P by the conveying unit 40.

A print target support assembly comprising a print platen structure providing an upper surface to support a print target as the print target passes under a print zone. The print zone is arranged across the surface perpendicular to a direction of print target advance. The surface comprises an inner belt area in the direction of print target advance, the inner belt area bounded on each side by an outer non-belt area. A belt advance mechanism, to advance a belt running across the inner belt area of the surface in the direction of print target advance, to advance the print target under the print zone. A flattening arrangement to flatten the print target onto the surface, under the print zone, across the inner belt area and the outer non-belt areas of the surface.

A vacuum lifter apparatus for lifting sheet material articles, comprises an upper chassis joined to a substantially planar lower suction plate and an airflow suction system for conveying vacuum air pressure to the suction plate. The suction plate comprises a plurality of suction plate modules, each comprising a housing with a substantially hollow interior and each of said housings being located laterally adjacent at least one other of said housings. Each of said housings comprises a lower plate, an upper plate and at least one side plate, each housing being affixed to said laterally adjacent housing along a seam between adjoining pairs of side plates. The upper plates each comprise at least one opening and said lower plates are each perforated with a plurality of orifices through which, in use, air is drawn along airflow paths through said interior and out of said opening by the airflow suction system.

An image forming device includes an image forming unit to form an image on a work, a conveyance unit to convey the work in a predetermined conveyance direction, a conveyance guide member, a suction unit, and a suction control unit. The conveyance guide member is a plate-shaped member which has a plurality of suction holes and guides conveyance of the work by the conveyance unit from below. The suction unit includes a suction device which generates suction air by sucking air in a space on an upper side of the conveyance guide member via the plurality of suction holes, and closely contacts the work to the conveyance guide member by the suction air. The suction control unit changes a sucking force of the suction device according to a length in the work width direction of the work guided by the conveyance guide member.