A system includes an image forming station, which is configured to apply droplets of one or more printing fluids to a target substrate, so as to form an image thereon, and a substrate conveyor, which includes one or more perforated plates having multiple openings, and is configured to grip and move the target substrate to and from the image forming station for forming the image, the substrate conveyor includes one or more rotatable elements, which are fitted in the respective openings, and are configured to provide mechanical support to the target substrate, and when the target substrate moves over the one or more rotatable elements, at least one of the rotatable elements is configured to rotate in response to a physical contact with the target substrate.

A system and method for performing quality control in a digital printing system (DPS) is provided. The DPS includes an impression station for transferring an ink image from a surface of an intermediate transfer member to a substrate. The impression station includes an impression cylinder housing one or more grippers operable to grasp and hold a leading edge of the substrate as it passes through the DPS, for conveying the substrate along the impression cylinder during the transfer of the ink image. An imaging device is operable, during advancement of the substrate on the impression cylinder, to capture a digital image including a region of interest (ROI) that is associated with at least a portion of the grippers and at least a portion of the substrate. A controller is configured, based on the digital image, to indicate an error in a position of the substrate relative to the grippers.

A device for further processing web- or sheet-type stock comprises a further-processing section, in which stock that is supplied on the input side can be processed into printed products. The further-processing section comprises, in the guide path of a processing line through which the stock has run, at least one first combining device relative to the stock path, which can combine one- or multi-layer stock sections to a bundle; a second combining device which can combine the bundles formed by the first combining device to a bundle stack downstream of the first combining device; and a transverse folding device which is arranged functionally downstream of the second combining device and which transversely forms the bundles or bundle stacks relative to the conveying device on the input side when they exit the second combining device. A device for joining several layers is placed in the guide path, such that it can join several or all of the stock sections combined in the first combining device into a bundle, before they are received by the second combining device and is associated with, are arranged downstream of the first combining device. During production of the products, a combined bundle is stapled before it is combined with one or more other bundles and is then transversely folded. In addition, a longitudinal cutting device is provided in the guide path downstream of the transverse folding device.

A method for avoiding collisions in a digital inkjet printing machine, a method and a device for actuator-based lifting movement of inkjet heads. A sensor/camera monitors the sheets as they travel towards the inkjet heads. In order to avoid collisions, the inkjet heads are raised and lowered again individually and in an oscillation-optimized manner when a defective sheet is detected. The machine does not need to be stopped in the event of defective sheets. Advantageously, rejects can thus be reduced and the performance of the machine can be exploited better.

There are provided a medium conveying device and an image recording apparatus that can convey a medium without the generation of wrinkles and floating. Projections having the same size are regularly disposed on the peripheral surface of an image recording drum to form recessed portions and protruding portions on the peripheral surface of the image recording drum. An interval between the projections disposed in a middle region is set to be smaller than an interval between the projections disposed in both end regions. Accordingly, when a sheet is pressed against the peripheral surface of the image recording drum by a pressing roller, forces for pulling the sheet to the outside from the middle in a width direction can be generated. As a result, the sheet can be made to come into close contact with the peripheral surface of the image recording drum without the generation of wrinkles and floating.

A liquid discharge apparatus includes: a liquid discharge head; a conveyer that supports and conveys a medium; a blower that is disposed on the upstream side of the liquid discharge head or the downstream side of the liquid discharge head and suppresses the change of the posture of the medium by sending the air to the medium; a temperature adjuster that is disposed on the side of the blower opposite to the liquid discharge head in the medium conveying direction and adjusts the temperature of an object to a temperature higher than the ambient temperature of the liquid discharge head or a temperature lower than the ambient temperature of the liquid discharge head; and a blast controller sends an operation stop command or an air reduction command to the blower at a blast region-pass timing at which the medium passes through a blast region of the blower.

A paper conveying apparatus includes: a driving device which rotates a driving rotating body by driving force; a conveying device which conveys a paper along a conveyance path according to rotation of a driven rotating body; an endless drive transmission belt which is stretched to the driving rotating body and the driven rotating body; a conveyance amount detecting device which detects a conveyance amount of the paper; an abnormality detecting device which detects abnormality of the paper; a stopping device which stops the driving device when the abnormality is detected; a calculating device which calculates the conveyance amount in time before conveyance stops after the abnormality is detected; a degradation detecting device which compares the calculated conveyance amount and a threshold and determines that the drive transmission belt is degraded if the calculated conveyance amount is larger than the threshold; and a reporting device which reports a determination result.

A sheet-like member holding device includes a first holding unit disposed between a gripper receiving portion and a side wall of a gap, and configured to hold a base of a non-metal sheet. The first holding unit includes a space in which the base is inserted while the non-metal sheet extends inward in a radial direction from an outer surface side of a printing cylinder, and an abutment wall configured to restrict movement of the base to the outside in the radial direction. An end portion of the space in an axial direction of the printing cylinder is open to the outside. This makes it possible to attach and detach the non-metal sheet by a simple method without moving a gripper member or gripper pad.

A digital printing apparatus including a sheet supply device, printing cylinder, inkjet nozzle portion, sheet delivery device, and conveyance devices. The sheet supply device supplies sheets one by one at a predetermined period. The printing cylinder includes at least one gripper device that grips and holds the sheet, and conveys the sheet while one edge of the sheet supplied from the sheet supply device is held by the plurality of gripper devices. The inkjet nozzle portion discharges ink droplets onto the sheet. The conveyance devices include a plurality of gripper devices including one reversing gripper device that grips and holds the other edge of the sheet, and conveys the sheet printed on one surface, which is received from the printing cylinder in a double-sided printing mode. The sheet is turned by reversing the obverse/reverse surface of the sheet by the reversing gripper device in the process of conveyance.

There are provided a medium conveying device and an image recording apparatus that can convey a medium without the generation of wrinkles and floating. Projections having the same size are regularly disposed on the peripheral surface of an image recording drum to form recessed portions and protruding portions on the peripheral surface of the image recording drum. An interval between the projections disposed in a middle region is set to be smaller than an interval between the projections disposed in both end regions. Accordingly, when a sheet is pressed against the peripheral surface of the image recording drum by a pressing roller, forces for pulling the sheet to the outside from the middle in a width direction can be generated. As a result, the sheet can be made to come into close contact with the peripheral surface of the image recording drum without the generation of wrinkles and floating.