A device for adjusting a printing head includes a step-by-step switching mechanism, an actuator for shifting the step-by-step switching mechanism, and a locking disk supported for rotation. A first shifting tongue is provided for incrementally rotating the locking disk in a first direction of rotation. The first shifting tongue has two elongated holes for guidance purposes, one of which has a lateral recess. It is thus possible to adjust printing heads with a high degree of accuracy while saving time and costs. The device is preferably implemented in industrial inkjet printing.

A digital decorator machine for the decoration of products (P), including a support frame, at least one conveyor, for transporting the products (P) to be decorated along an advancement direction, at least one decoration element, associated with said support frame and positioned above said conveyor, said at least one decoration element including respective print heads provided with ejector nozzles for a fluid to be dispensed on the surface of the products (P) to be decorated, and a casing within which at least one support is housed that is integral with said heads. The support is movable, with respect to said casing, between an upper inactive position and a lower operating position, in which said heads are correctly spaced with respect to the surface of the products to be decorated (P).

In a print head support assembly for carrying a number of print heads and for positioning the number of print heads, the print head support assembly includes a carriage plate provided with reference elements for positioning the number of print heads, the carriage plate being further provided with at least four support positions and a support sub-assembly provided with at least four adjustable mounting points for coupling to said at least four support positions and for supporting the carriage plate at said at least four support positions. The support sub-assembly is configured to constrain the carriage plate in six degrees of freedom with respect to a position of the carriage plate and to constrain the carriage plate in at least one degree of freedom with respect to a shape of the carriage plate. Thus, a light-weight and compliant carriage plate may be used to provide for a light-weight carriage suitable for high-speed printing.

A carriage device includes a first guide member and a second guide member for supporting a carriage with a head mounted thereon at two separate positions and guiding reciprocation of the carriage, a first adjustment unit configured to adjust a height of the carriage relative to the first guide member through movement of the carriage, and a second adjustment unit configured to adjust a height of the carriage relative to the second guide member through the movement of the carriage. The carriage device can sequentially perform a first operation of changing the height of the carriage by the first adjustment unit and a second operation of changing the height of the carriage by the second adjustment unit.

A printing apparatus includes a printhead on a movable carriage; an operating unit operating by a driving force of a driving source; a transmitting unit being displaced by the driving force between a position where the transmitting unit transmits the driving force to the operating unit and a non-transmitting position; a movable member arranged on a moving path of the carriage; a restricting member being displaced, in coordination with a displacement of the movable member, between a position where the displacement of the transmitting unit is restricted and a non-restricting position; and a selecting member provided between the movable member and the restricting member. The selecting member is displaced between a position where the movable member and the restricting member are coordinated with each other by the selecting member and a non-coordinating position.

Problem: To provide a technique by which high-precision application can be performed even under conditions where positional misalignment occurs in regularly arranged workpieces.

Solution: Provided is a liquid-material application method of performing application in a predetermined application pattern on a plurality of workpieces 10, 30 arranged with positional misalignment. The liquid-material application method includes: a horizontal-position information measuring step of measuring horizontal-position information of each of the plurality of workpieces 10, 30 by an imaging device 112; a height information measuring step of measuring height information of each of the plurality of workpieces 10, 30 by a ranging device 113; and an application step of performing application in the application pattern on the plurality of workpieces 10, 30 based on the horizontal-position information measured in the horizontal-position information measuring step and the height information measured in the height information measuring step. Also provided is an apparatus for carrying out the method.

A three-dimensional printing device includes a first head having a first nozzle array that ejects liquid, a second head having a second nozzle array that ejects liquid, and a moving mechanism having a linear motion mechanism that changes relative positions of the heads with respect to a three-dimensional workpiece. The first region of the workpiece is more inclined with respect to the first axis than the second region of the workpiece. A time period when the first nozzle array faces the first region and the second nozzle array faces the second region is a first time period. In the first time period, the first nozzle array ejects the liquid onto the first region in a first ejection cycle. In the first time period, the second nozzle array ejects the liquid onto the second region in a second ejection cycle. The first ejection cycle is shorter than the second ejection cycle.

An inkjet printer includes an array of overlapping printheads. Each printhead having includes a first row of butting print chips connected to a first PCB and a parallel second row of butting print chips connected to a second PCB, the first and second rows of butting print chips having 180 degree rotational symmetry. A first printhead in the array is positioned in a first orientation relative to a media path and a neighboring second printhead in the array is positioned in an opposite second orientation relative to the media path. Data signals corresponding to a first color plane are distributed only via the first PCB of the first printhead and data signals corresponding to the first color plane are distributed only via the second PCB of the second printhead.

A controller drives a conveyer to start to convey a sheet of continuous paper and accelerates the sheet to a printing conveyance speed, and drives an inkjet head to start to perform a printing while driving the conveyer to convey the sheet at the printing conveyance speed. The controller drives a tension adjuster to adjust a tension of the sheet such that the tension of the sheet during acceleration after start of conveyance of the sheet is smaller than the tension of the sheet during the printing, and drives the head gap adjuster to adjust a head gap between the inkjet head and the sheet such that a first head gap during the acceleration of the sheet is greater than a second head gap during the printing.

A simple configuration avoids exposure of a star wheel that prevents the media from lifting up when the media conveyance path opens. A platen top unit 20 that supports first and second star wheels 25A, 25B is separated from an opening and closing platen unit 8, and is supported movably vertically. when the platen unit 8 is moved to the open position 8B to open the third conveyance path section 10c of the conveyance path 10 when a paper jam occurs, for example, the head elevator 17 is controlled to raise the platen top unit 20 and retract the first and second star wheels 25A, 25B supported by the platen top unit 20 to a position removed from easy contact with the user's hands.