There is provided a printing apparatus which includes the following: A printhead including a plurality of nozzles that discharge ink to a print medium. A first detection unit that detects a distance between the printhead and a platen. An adjustment unit that adjusts the distance between the printhead and the platen. An acquisition unit that acquires difference information concerning a difference of a distance between the platen and each of the nozzle on an upstream side and the nozzle on a downstream side in a conveyance direction of the print medium. The adjustment unit adjusts the distance based on a detection result of the first detection unit and the difference information acquired by the acquisition unit.

An image forming apparatus includes a moving unit and a lifting and lowering mechanism. The moving unit is supported by a casing in an upwardly and downwardly moving manner. A fixed pully and a winding pully are provided in the casing. A movable pulley is provided in the moving unit. A wire is configured to be wound around the fixed pulley and the movable pulley. One end of the wire is fixed to the casing and the other end of the wire is fixed to the winding pulley. A rack is provided in the casing along an upper-and-lower direction. A pinion is provided in the moving unit and configured to be engaged with the rack. The winding pulley is rotated to wind and unwind the wire via the fixed pulley and the movable pulley, and the moving unit is lifted and lowered while the pinion being engaged with the rack.

An image forming apparatus includes a head unit, a conveyance unit, a lifting and lowering mechanism, a drive source and a transmission mechanism. The head unit is provided with an inkjet head having a discharge opening through which an ink is discharged. The conveyance unit is supported in an upwardly and downwardly movable manner in directions close to and apart from the head unit from a lower side. The lifting and lowering mechanism is configured to lift and lower the conveyance unit. The drive source is configured to drive the lifting and lowering mechanism. The transmission mechanism is configured to transmit driving force from the drive source to the lifting and lowering mechanism. The transmission mechanism includes a warm gear, a warm wheel meshed with the warm gear and a resistance applying member configured to apply resistance to rotation of the warm gear.

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).

A recording device includes a recording head (a printing head) with multiple nozzles arranged therein to discharge droplets (ink droplets) onto a recording medium (a printing medium), and a recording controller (a printing controller) configured to control recording of a recording image, the recording including moving the recording head relative to the recording medium while the droplets are discharged. The recording controller is configured to control the recording for pixel data of the recording image that have a prescribed gray scale value or larger under conditions that a nozzle duty corresponding to the number of nozzles, included in the multiple nozzles and being able to discharge the droplets per unit area on the recording medium, is smaller than or equal to an upper limit value and that a discharge amount of the droplets discharged per the unit area is variable.

Provided is a recording device that performs recording on a recording medium by repeating a pass operation of discharging ink from a recording head onto the recording medium during a main scanning operation of moving the recording head in a main scanning direction, and a sub-scanning operation of moving the recording medium relative to the recording head in a sub-scanning direction intersecting with the main scanning direction. An electronic controller stops the main scanning unit for a predetermined stop time determined based on a gap that is a distance between a head surface of the recording head and a recording surface of the recording medium supported by a support unit, prior to the pass operation.

There are provided a liquid jetting apparatus in which the deterioration of production efficiency is suppressed in a case in which the floating of a medium occurs, and a method of coping with the floating of a medium. A medium is fed; liquid is jetted to the medium, which is transported by a medium transport unit including a medium support surface on which the medium is supported and transporting the fed medium in a medium transport direction, by a liquid jet head; drying processing is performed on the medium, to which the liquid jetted from the liquid jet head adheres, at a position on the downstream side of the liquid jet head in the medium transport direction; and in a case in which the floating of the medium is detected at a position on the upstream side of the liquid jet head in the medium transport direction, the medium continues to be fed, the liquid jet head is moved to a retreat position from a liquid jet position, and the intensity of drying processing is suppressed in comparison with that in a liquid-drying processing-performing state in which drying processing is performed on the medium.

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).

Digital inkjet printing machine printing on cylindrical substrates, comprising a conveyor table conveying a cylindrical substrate and a printing station equipped with printheads having a parallel longitudinal axis. The table has a vertical rotation axis and supports a spindle supporting the cylindrical substrate. The spindle has an axis radially oriented with respect to the vertical rotation axis, and is actuatable in rotation about its axis. The conveyor table is configured to stop the spindle below the printheads, so the printheads have its axis parallel to the longitudinal axis of the printheads. The spindle axis stopped below the printheads belongs to main planes in which the printheads lie. The printheads are equidistant from the axis of the spindle. A first adjustment means adjusts the distance between the axis of the spindle and the printheads and a second adjustment means adjusts the orientation of the main planes in which the printheads lie.

An inkjet printer is described. The inkjet printer has a substrate holder assembly that includes a base member having a long axis in a first direction and a short axis in a second direction perpendicular to the first direction; a contact member coupled to the base member, the contact member having a long axis in the first direction and a short axis in the second direction; a holder carriage coupled to the base member; a linear extender coupled between the base member and the contact member and extending in a third direction intersecting with the first direction and the second direction from the base member toward the contact member; and a flex member coupled to the base member, extending in the second direction between the linear extender and the contact member, and having a flex direction in a direction perpendicular to the first direction and the second direction.