Provided are a head device, an ink jet printing device, and a driving voltage adjustment method capable of adjusting a driving voltage corresponding to a target jetting amount and suppressing unevenness of printing density occurring between head modules. A dead device includes an ink jet head including a plurality of head modules, and a driving voltage supply device that includes a processor and supplies a driving voltage to the ink jet head, in which the processor acquires a module characteristic, acquires an ink characteristic of ink applied to printing, derives a first voltage coefficient for adjusting a driving voltage corresponding to a target jetting amount for each head module based on the module characteristic and the ink characteristic, and adjusts the driving voltage by applying the first voltage coefficient for each head module.

A printing machine comprising advancement elements for advancing material in sheet form to be printed which are provided at least with a traction drum which is designed to receive, at an entry region, the material in sheet form to be printed and to convey it toward an exit region spaced circumferentially apart, along the direction of rotation of the traction drum about its own axis, from the entry region; analog print stations are arranged around the traction drum, between the entry region and the exit region and, between at least two analog print stations, conveyance means are provided for conveying the material in sheet form to be printed which arrives from the traction drum along an advancement path that has at least one advancement portion for advancing the material in sheet form to be printed which extends substantially straight, along which at least one digital print station is arranged.

Printing methods and devices identify distortable ink colors in a print job. These distortable ink colors interact with one another when printed in the same printing pass on the same area of a sheet. These methods and devices control printheads and sheet feeders to separately print the distortable ink colors in different print passes.

A liquid discharge head angle adjuster for individually adjusting inclination angles of a plurality of liquid discharge heads includes a plurality of array members and a plurality of array supports. The plurality of array members holds the liquid discharge heads. The plurality of array supports the array members. At least one of the array supports includes a first support, a second support, and a pressing member. The first support is disposed on one side in a direction in which one of the liquid discharge heads is rotated when an inclination angle of the one of the liquid discharge heads is adjusted. The first support supports a rotation fulcrum of one of the array members. The second support is disposed on a side opposite the first support, and supports another of the array member. The pressing member presses the rotation fulcrum against the first support.

A recording device includes transport units, a corona irradiation unit, an ejecting unit, and a control unit, and changes intensity of irradiation, performed the corona irradiation unit, according to ejection density of the white ink, when a target recording medium is formed with a colored image with a colored ink on the background image after the target recording medium is formed with a background image with a white ink.

A recording device includes a recording head, a conveyance portion that conveys a liquid-ejected medium so that the liquid-ejected medium passes through a position facing the recording head, a supply portion for air, and an air blowing mechanism that is disposed on an upstream side of the recording head in a relative moving direction between the recording head and the liquid-ejected medium, the air blowing mechanism including an air blow-out port for blowing out air from the supply portion toward a gap between the recording head and the liquid-ejected medium. The air blow-out port includes a plurality of slits that are lined up in a direction intersecting the relative moving direction, and the plurality of slits are lined up in the direction intersecting the relative moving direction so that long sides of the adjacent slits have regions facing each other in a direction orthogonal to the long sides.

The disclosure concerns a test apparatus comprising a drum (100) configured such that ink drops (200) deposited on the surface of the drum form a printed marking (210) on the surface of the drum. The test apparatus further comprises an ink removal unit (300) configured to remove ink from the surface of the drum. The drum is at least partially transmissive of light and a light source (800) is disposed inside the drum to controllably illuminate the drum.

In some examples, a printing press includes a support element with a circulatingly movable contact surface for contacting a printing substrate. An ink jet print head includes an ejection opening arranged to be directed at the support element. Additionally, the printing press includes a charging device that includes a charging electrode, which is arranged to be directed at the contact surface. The charging device further includes a counter-electrode, and the movable contact surface is at least partially arranged between the charging electrode and the counter-electrode of the charging device. A smallest distance between the charging electrode and the movable contact surface is greater than a smallest distance between the ejection opening of the ink jet print head and the contact surface. For example, the smallest distance between the charging electrode and the contact surface may be at least 50 mm.

There is provided a liquid ejecting apparatus including: a liquid ejecting head having an ejection surface including a first nozzle row configured to eject a first ink and a second nozzle row configured to eject a second ink; and a support configured to support the liquid ejecting head in an inclined posture in which the ejection surface is inclined with respect to a horizontal plane, in which the first nozzle row is positioned above the second nozzle row with respect to a vertical direction in a state where the support supports the liquid ejecting head in the inclined posture, and a thickening resistance of the second ink is higher than a thickening resistance of the first ink.

Since a head part is arranged in an inclined posture, the ink ejected from a nozzle surface of the head part may drip to a first lower surface peripheral edge portion along the nozzle surface, and then drops from a first long side of a lower surface of the head part toward a first side wall of a cover member being arranged below the head part. The first side wall having an upper end portion is located away from the first long side. Thus, the dropped ink is collected by the cover member without being attached to the upper end portion of the first side wall. Therefore, the ink can be prevented from being solidified at the first lower surface peripheral edge portion and the reattachment of the ink to the nozzle surface can be effectively prevented.