A liquid discharge apparatus includes: a liquid discharge head configured to discharge a liquid in a discharge direction onto a liquid application target; a stage configured to hold and move the liquid application target in a conveyance direction orthogonal to the discharge direction, a carriage on which the liquid discharge head is mounted; a guide holding the carriage movable in a main scanning direction orthogonal to each of the discharge direction and the conveyance direction; a pair of holders respectively holding sides of the guide in the main scanning direction; and multiple eccentric cams contacting the pair of holders, the multiple eccentric cams rotatable to move at least one of the pair of holders in at least one of the conveyance direction or the discharge direction to adjust a position of the carriage or the guide.

The present invention relates to an ink-jet print heads protecting system in a digital printing machine, wherein the module comprises a chassis (1), rollers (2), and a plurality of digital printing units (10), each with a bridge (11) with guides (12) and a sliding carriage (13) with ink-jet print heads (14), one part of each guide overlapping the band and another part projecting beyond the band path, the carriage being movable between the printing and maintenance positions; and in that each bridge is attached to the chassis by of a position adjustment device (20) and an articulation (25) that are spaced apart or by two position adjustment devices (20) that are spaced apart.

A method for printing on a tilted print medium using a first printing strategy or a second printing strategy. The first printing strategy includes: acquiring a tilted direction and a tilted angle of the titled print medium; acquiring a print start point; starting print from the start point and continuously translating the printhead toward the tilted opposite side in a direction perpendicular to the moving direction of the tilted print medium, and during the translation, controlling the inkjet hole to delay ink-jetting in the direction parallel to the moving direction of the tilted print medium. The second printing strategy includes: determining a tilted angle of the print medium and a position of a print standard point after tilted, adjusting the print content to be mirror symmetrical with the print medium, and controlling the printhead to print according to the print content when the print standard point reaches the printhead.

A liquid discharge apparatus to discharge liquid to apply the liquid to an object includes a head, a mover, a rotator, and processing circuitry. The head has a nozzle surface in which a plurality of nozzle rows each including a plurality of nozzles to discharge the liquid are arranged. The mover relatively moves the head and the object in each of a first direction and a second direction orthogonal to each other along the nozzle surface. The rotator rotates the head along the nozzle surface. The processing circuitry controls the relative movement to correct unevenness of a nozzle interval between the plurality of nozzles along the second direction caused by an inclination between the first direction and a third direction when the head is rotated. The third direction is a direction in which the plurality of nozzles are arranged in each of the plurality of nozzle rows.

A single pass inkjet printer that utilizes a modular printing system with one or more self-contained printing modules, where each printing module is easy to remove and replace from a large printing machine, thus resulting in an overall system that is easy to service and maintain Each module is a self-contained printer including an ink supply, printhead drive electronics, and printhead assembly in order to provide one color or fluid of inkjet printing capability. Each module includes a precise three-point compliant self-aligning mount system to obtain accurate printhead positioning, and a unique integrated printhead tending system that includes a compact movable vacuum knife for cleaning the printheads, and a printhead capping station for sealing and protecting the printheads from the ambient environment when not in use.

An image forming apparatus includes a conveyance part, a head unit, a distance changing part, three blocks and three pins. The distance changing part moves the head unit between a printing position where a printing operation is performed and a retreat position separated away from the conveyance part farther than the printing position. The three blocks are provided in one of the conveyance part and the head unit at intervals in the conveyance direction and a width direction crossing the conveyance direction. The three pins are provided in the other of the conveyance part and the head unit at positions facing the three blocks. Each of the three blocks has a positioning groove having a pair of inclined surfaces. The pins come into two-point contact with the inclined surfaces of the blocks in a state where the head unit is positioned in the printing position.

A head unit (51) includes a recording head (52), a frame (53), and an angle adjusting portion (8). The frame (53), to which the recording head (52) is rotatably connected, has a side wall (531) to be adjacent to the recording head (52). The angle adjusting portion (8) includes frame and head adjusting screws (81, 82) and rotates the recording head (52). The frame adjusting screw (81) is on the side wall (531), on its face opposite the recording head (52), and can reciprocate toward and away from the recording head (52). The head adjusting screw (82) is on the recording head (52), on its face opposite the side wall (531), and can reciprocate toward and away from the side wall (531). The frame and head adjusting screws (81, 82) make contact with each other at their tip end parts in the direction in which they face each other.

A printing device is provided for printing on a workpiece, which preferably comprises at least partially wood, wood fiber containing materials, wood composite materials, veneer, plastic, or a combination thereof. The printing device can include a housing, a holding element arranged on the housing, a print head attached to a first side of the housing, and a first interface. The first interface can communicatively and operatively connect the print head to containers for print media. Further, the printing device can be portable.

Mechanisms for adjusting the position of one or more print heads at an extremely fine resolution (e.g., less than 10 μm) are described herein. The adjustment mechanisms include a differential screw and an indexing wheel through which the differential screw extends. One threaded segment of the differential screw is connected to a threaded feature of a flexible body that is coupled to the print head(s), while another threaded segment of the differential screw is connected to a threaded feature of a rigid body that is coupled to a printer assembly. As the indexing wheel and differential screw rotate, the space between the flexible body and the rigid body changes based on the difference between the pitches of the threaded segments. The adjustment mechanisms described herein utilize the accurate, consistent motion of the flexible body upon experiencing pressure to effect predictable changes in the position of the print head(s).

A liquid discharge apparatus records dots of liquid on a medium by interlace recording. The liquid discharge apparatus includes a head, a mover, a tilt adjuster, and control circuitry. The head discharges the liquid from nozzles. The mover relatively moves the head and the medium in each of main-scanning and sub-scanning directions. The tilt adjuster changes a tilt of the head with respect to the medium. The control circuitry controls recording on the medium. The control circuitry causes the mover to relatively move the head and the medium in the main-scanning direction with the head tilted to at least a first angle or a second angle. An interval between adjacent nozzles in the sub-scanning direction is a first interval in a state where the tilt is the first angle. The interval is a second interval different from the first interval in a state where the tilt is the second angle.