Abstract: An apparatus and method for use in printing an image in a multipass printing device, the method comprising obtaining information identifying two or more defective nozzles in a nozzle array, determining that a line of a printed image is associated with more than a first predetermined number of defective nozzles based on the obtained information identifying two or more defective nozzles and selected step sizes, and identifying adjusted step sizes such that no more than the first predetermined number of defective nozzles is associated with any line of the printed image.

Abstract: According to one example of the present invention there is provided a printing system for printing on a substrate supported on a substrate support. The printing system comprises a plurality of substrate support sections each having an array of orifices selectively in fluid communication with a vacuum source. A controller is configured to apply vacuum pressure from the vacuum source to different ones of the substrate support sections in accordance with a vacuum activation program.

Abstract: Examples are provided of plural light-emitting diodes (LEDs) arranged as vectors within an array. The vectors are individually drivable by way of a controller. A sensor scans the array and individual energy output values are correlated to electrical drive currents for each vector. The correlated data is recorded and used to control the vectors such that an equalized or uniform photonic energy profile is incident upon a media positioned as a target with respect to the LED system.

Abstract: Disclosed is a method and apparatus for improving printed image quality. The image quality improvement is achieved by differentially curing different image elements such as continuous tone elements, uniform tinted and solid elements, color elements, line art and text elements. A delay in the activation, duration and variation in the intensity of the curing radiation or a mix of some or all of them that follows the ink droplet on substrate deposition controls the ink droplet spread and accordingly the image quality.

Abstract: An ink delivery device, method and non-transitory computer readable medium, the device may include a first closed pathway for a first ink flow through a multi-nozzle printhead in a first direction, and a second closed pathway for a second ink flow through the multi-nozzle printhead, the second pathway configured to move the second ink flow in a second direction. The device may further include a first shunt between the first closed pathway and the second closed pathway at a first end of the multi-nozzle printhead, the first shunt allowing some of the first ink flow to merge with the second ink flow, and a second shunt between the first closed pathway and the second closed pathway at a second end of the multi-nozzle printhead, the second shunt allowing some of the second ink flow to merge with the first ink flow.

Abstract: The method of operating an inkjet printing system includes ejecting usable fluid on a substrate in a print mode and in a purge container in a maintenance mode by a print head. The method also includes receiving recovered fluid from the purge container and source fluid from the source supply to form the usable fluid in a primary fluid tank. The method also includes receiving and providing an amount of the usable fluid from the primary fluid tank to the print head by at least one of a first supplemental fluid tank and a second supplemental fluid tank. The method also includes determining a consumed amount of the usable fluid corresponding to an amount of the usable fluid used by the print head reduced by an amount of the recovered fluid received by the primary fluid tank from the purge container.

Abstract: According to one example, there is provided a method or system for modifying the surface topography of a substrate support.

Abstract: In one implementation, an encoder assembly for a printer includes: an encoder scale having indicators thereon for determining a printing parameter; an encoder sensor for sensing indicators on the scale; and a mechanism configured to alternately attach an encoder part (either the scale or the sensor) to the substrate and detach the encoder part from the substrate. In another implementation, a method includes: attaching an encoder part to a print substrate, the encoder part being either an encoder scale or an encoder sensor; the sensor sensing indicators on the scale while advancing the substrate with the encoder part attached; and detaching the encoder part from the substrate.

Abstract: A method system and device, to align a substrate on a surface, the device including a first intake and a second intake where the first intake is configured to accept a first fluid and the second intake is configured to accept a second fluid. The first fluid is channeled into the device to vertically move the device a distance, and the second fluid calibrated and channeled into the nozzle, the nozzle having a focusing outlet, and where the fluids are configured to exert a force to facilitate the alignment of the substrate on the surface.

Abstract: An aqueous ink composition includes at least 60% water by weight, an acrylic latex polymer suspension, a polyurethane suspension, a polyethylene wax suspension, and an organic solvent that comprises about 10% to about 30% of the ink composition. In methods for preparing an aqueous ink composition, a combination of the aforementioned components is provided. The combination is subjected to conditions under which the ink composition becomes substantially uniform and then the combination is subjected to filtration.

Abstract: An image forming system, a media drying device usable therewith and a method are disclosed. The image forming system, media drying device and method include application of heat in a form of heated air to liquid ink disposed on media to remove water from the liquid ink in a form of vapor. The image forming system, media drying device and method also include recovery of at least a portion of the heat from the media.

Abstract: An image forming apparatus includes an ink applicator unit to selectively apply ultraviolet (UV) curable ink on a media, a media support unit to support the media to receive the UV curable ink, and a UV radiation curing device to cure the UV curable ink on the media. The UV radiation curing device includes a UV radiation source module to emit an electromagnetic spectrum and a dispersion member. The dispersion member may separate ultraviolet electromagnetic radiation subtype C (UVC radiation) from at least one of ultraviolet electromagnetic radiation subtype A (UVA radiation) in the electromagnetic spectrum and ultraviolet electromagnetic radiation subtype B (UVB radiation), apply the UVC radiation to the UV curable ink on the media, and subsequently apply the at least one of the UVA radiation and the UVB radiation after the UVC radiation is applied to the UV curable ink on the media.

Abstract: Disclosed is a system for printing an image comprising a plurality of pixels, the system comprising: a carriage arranged to make a plurality of passes along a scanning axis with respect to a print medium; a plurality of printheads mounted on the carriage, each printhead corresponding to a different ink color and comprising at least one ejection nozzle; and, a print controller configured to receive data defining for each pass zero or more locations at which to deposit each of the ink colors to produce each pixel; wherein the data is such that for at least one pixel, at least one of the ink colors is deposited at substantially more locations on one pass relative to the other passes.

Abstract: In one example, a pallet conveyor includes: a forward track to guide pallets from an upstream part of the forward track to a downstream part of the forward track; a return track; and a pallet transfer device configured to simultaneously (1) continuously receive pallets from a downstream part of the return track and give pallets to the upstream part of the forward track and (2) continuously receive pallets from the downstream part of the forward track and give pallets to an upstream part of the return track.

Abstract: Disclosed is an inkjet print head array with improved ink supply system. The system includes an ink manifold having at least two ink supply channels, a plurality of print head modules disposed along ink supply channels and forming the array, with each of the print head modules having at least two ink inlet ports. The ports are in fluid communication with the ink supply channels. Each of the ink supply channels supplies ink to each of the ports at a different flow rate, although the resulting ink supply flow rate is equal for each print head module.

Abstract: A pretreatment liquid for applying to the upper surface of a recording media, prior to printing of printing applications using water-based ink, is provided. The liquid comprises a polyvalent metallic salt and at least one of a polymer swelling and a coalescence reagent.

Abstract: The present invention is concerned with a drum printer in which the loading and unloading of printing medium onto and off a drum of the printer is performed without interrupting or decelerating the drum rotation and the printing process.

Abstract: Disclosed is a method of multi pass inkjet printing on wide format flexible substrates where errors in flexible substrate positions are corrected by adapting the geometry and position of the next printed swath to the geometry of the adjacent earlier printed image swath.