Mechanisms for adjusting the position of one or more print heads at an extremely fine resolution (e.g., less than 10 m) 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).

Printheads for a jetting apparatus that may be oriented at different angles to print at different resolutions. In one embodiment, a printhead has a nozzle plate with nozzles arranged in rows that are parallel, and attachment members. The nozzles in each of the rows are spaced by a nozzle distance, and the rows of nozzles are spaced at a distance of n times the nozzle distance. The attachment members may orient the printhead at an angle that is perpendicular to a direction of relative movement between the printhead and a print medium to print at a one resolution, and may orient the printhead at another angle (in a range of 36 and 38 degrees) to the direction of relative movement between the printhead and the print medium to print at a higher resolution.

Ahead module includes: an inkjet head that ejects ink; and a mounting member on which the inkjet head is mounted, wherein the inkjet head is mounted on the mounting member by being pressed against the mounting member by a presser, and a mounting position to the mounting member is adjusted by a position adjuster in a direction intersecting with a pressing direction of the presser.

A device for adjusting print heads, in particular inkjet print heads of an inkjet printing machine, on a print bar includes motors disposed in a row and supported for joint movement. Every motor carries a motor gearwheel and every motor gearwheel is successively engageable with at least two respective adjustment gearwheels.

A recording-head position adjustment mechanism includes a supporting member supporting a recording head that discharges a liquid droplet, the recording head including an abutting portion. The recording-head position adjustment mechanism includes a positioner on which the abutting portion abuts, the positioner to which the abutting portion is fixed so as to determine a position of the recording head in a longitudinal direction of the recording head with respect to the supporting member. A position of the positioner in the longitudinal direction with respect to the supporting member is adjustable.

In an embodiment of the present invention, even though there is a print shift due to a gap between a nozzle in an upstream side and a nozzle in a downstream side of a printhead, a printing apparatus capable of precisely adjusting a slant of a printhead with respect to a conveyance direction in a nozzle surface of the printhead is provided. According to the embodiment, two adjustment patterns are printed at two different carriage speeds, respectively, and a print shift due to a slant of the nozzle surface of the printhead with respect to a conveyance direction of a print medium is adjusted based on these two print results.

In order to prevent streaks during the ink-jet paint coating of substrates, the invention provides a method for printing sheet-type substrates, in which a substrate (3) is moved in a feed direction (4) past an application device (7) by means of a conveying device (5) and during the movement of the substrate the application device (7) applies a fluid application material (9) drop by drop to the surface (30) of the substrate (3) in a pattern (14) with a pre-defined contour (15), in particular leaving out regions (16), through a plurality of ink-jet nozzles (70) arranged in a row transversely to the feed direction, in response to computer-controlled switching signals, wherein during the application of the pattern (14) and during the movement of the substrate (3) the ink-jet nozzles (70) are moved back and forth transversely to the feed direction (4), preferably in the longitudinal direction of the arranged row of ink-jet nozzles (70), such that the paths (72) traveled by the nozzles (70) over the substrate by the overlap of the movement back and forth with the movement in the feed direction (4) have direction components running perpendicular to the feed direction (4).

A liquid ejecting head is mounted on a carriage in which a first positioning hole defined by a first inner surface is provided. The liquid ejecting head includes a first positioning member and a first intermediate member. The first intermediate member includes a first expansion portion being capable of being inserted into a first positioning hole and abutting on the first inner surface by expanding in a radial direction intersecting with an insertion direction of the first expansion portion. The first expansion portion includes a first insertion hole into which the first positioning member is inserted and expands in the radial direction by the first positioning member being inserted into the first insertion hole.

Provided is a printer having: a carriage configured to carry and move a printhead; a camera attached to the carriage and configured to photograph an image printed by the printhead; an adjustment mechanism configured to adjust an installation position of the camera; and a processor configured to control to move the carriage to a position of a predetermined specific mark, photograph the specific mark by the camera, and based on a photographed image of the specific mark, adjust an installation position of the camera by the adjustment mechanism.

Mechanisms for adjusting the position of one or more print heads at an extremely fine resolution (e.g., less than 10 m) 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).