According to one embodiment, a tablet printing apparatus includes: a conveyer configured to convey a tablet along a line; an applicator head including a plurality of nozzles arranged in a direction crossing the conveyance direction of the tablet conveyed by the conveyer, configured to perform printing on the tablet by ejecting a liquid from the nozzles; and a controller configured to control the ejection of the liquid from the nozzles of the applicator head. The length of an array of the nozzles in a direction perpendicular to the conveyance direction is equal to or longer than the length of the tablet in the direction perpendicular to the conveyance direction. The controller is further configured to control switching of a nozzle used for printing on the tablet among the nozzles by a plurality of sections determined in advance.

An inkjet printhead includes: a fluid manifold having a base defining a plurality of fluid outlets and printhead chips attached to the base. Each printhead chip receives printing fluid from a set of the fluid outlets. All fluid outlets are flared with a respect to a width dimension of the printhead chips for facilitating removal of air bubbles.

An inkjet printhead includes: a fluid manifold having a base defining a plurality of fluid outlets and printhead chips attached to the base. Each printhead chip receives printing fluid from a set of the fluid outlets. All fluid outlets are flared with a respect to a width dimension of the printhead chips for facilitating removal of air bubbles.

A method of single-pass printing uses a printing system having first and second aligned printheads supplied with a same ink. The method includes the steps of: receiving first and second halftone images at the first and second printheads, respectively; printing the first halftone image from the first printhead; and printing the second halftone image from the second printhead. The first halftone image is based on a first dither pattern and the second halftone image is based on a second dither pattern, the first dither pattern being different than the second dither pattern.

Provided are an inkjet printer and an inkjet printing method with which, when image forming is performed on a web-shaped printing base material with inkjet inks, nozzles for discharging the inks are less liable to clog, streaks or density unevenness is less liable to occur at the time of solid printing, and a density of a single-color printing portion is easily increased. The inkjet printer for an inkjet ink is configured to perform image forming by discharging inkjet inks on a web-shaped printing base material by a single-pass method. The inkjet printer includes: a conveyance mechanism configured to continuously convey the web-shaped printing base material; a plurality of single-pass inkjet heads configured to discharge the inkjet inks to a front surface of the web-shaped printing base material conveyed by the conveyance mechanism; and a curing device configured to cure the inkjet inks discharged on the front surface of the web-shaped printing base material. Resolutions of the plurality of single-pass inkjet heads are varied depending on colors of the inkjet inks.

A method of processing a contone image for single-pass printing uses a printing system having first and second aligned printheads supplied with a same ink. The method includes the steps of: providing the contone image at a first resolution in a printing direction; dithering the contone image using a combined dither pattern to provide a full halftone image at the first resolution; dividing the full halftone image into first and second halftone images at a second resolution in the printing direction, the second resolution being less than the first resolution; and sending the first and second halftone images to respective first and second printheads for printing. The combined dither pattern is a combination of a first dither pattern for the first printhead and a second dither pattern for the second printhead, the first dither pattern being different than the second dither pattern.

Provided is a recording device including a recording head, and a control unit. The control unit is configured to cause the recording head to record each of a raster lines of an overlapping region of an image by an overlap mode of recording one raster line using a plurality of a first nozzles, record a penetrant liquid in at least a portion of an overlapping region by a second nozzles, and record the penetrant liquid in a region of the image other than the overlapping region in an amount less than that of the penetrant liquid recorded in the at least a portion of the overlapping region.

A method for printing sheet-type substrates to prevent streaks during the ink-jet paint coating of substrates, includes moving a substrate in a feed direction past an application device by means of a conveying device, applying with the application device, during the movement of the substrate, a fluid application material drop by drop to the surface of the substrate in a pattern with a pre-defined contour, in particular leaving out regions, through a plurality of ink-jet nozzles arranged in a row transversely to the feed direction, in response to computer-controlled switching signals, and during the application of the pattern and during the movement of the substrate, moving the ink-jet nozzles back and forth transversely to the feed direction, preferably in the longitudinal direction of the arranged row of ink-jet nozzles, such that the paths travelled by the nozzles over the substrate by the overlap of the movement back and forth with the movement in the feed direction have direction components running perpendicular to the feed direction.

A method for printing sheet-type substrates to prevent streaks during the ink-jet paint coating of substrates, includes moving a substrate in a feed direction past an application device by means of a conveying device, applying with the application device, during the movement of the substrate, a fluid application material drop by drop to the surface of the substrate in a pattern with a pre-defined contour, in particular leaving out regions, through a plurality of ink-jet nozzles arranged in a row transversely to the feed direction, in response to computer-controlled switching signals, and during the application of the pattern and during the movement of the substrate, moving the ink-jet nozzles back and forth transversely to the feed direction, preferably in the longitudinal direction of the arranged row of ink-jet nozzles, such that the paths travelled by the nozzles over the substrate by the overlap of the movement back and forth with the movement in the feed direction have direction components running perpendicular to the feed direction.

A method of single-pass printing uses a printing system having first and second aligned printheads supplied with a same ink. The method includes the steps of: receiving first and second halftone images at the first and second printheads, respectively; printing the first halftone image from the first printhead; and printing the second halftone image from the second printhead. The first halftone image is based on a first dither pattern and the second halftone image is based on a second dither pattern, the first dither pattern being different than the second dither pattern.