Abstract: In an example, a printer ink dryer unit comprises at least one ultraviolet light source to dry a printer ink layer by causing evaporation of a solvent fluid therefrom.

Abstract: Examples described herein include a print media edge repair system that includes a first repair element disposed adjacent to a media handling path to repair a leading edge of a sheet of print media as the sheet of print media moves into a position relative to a printing system associated with the print media edge repair system. The print media repair system may also include a second repair element disposed opposite the first repair element across the media handling path to repair a trailing edge of the sheet of print media as the sheet of print media moves into the position relative to a printing system.

Abstract: In an example of the disclosure, a print job is received. The print job includes an image to be printed upon a substrate utilizing printheads. The print job is analyzed to determine a set of imaged segments, a set of image-adjacent segments, and a set of remote segments. The print job is printed upon the substrate utilizing a first set of printheads. A cooling liquid is applied to the set of image-adjacent segments of the printed print job utilizing a second set of printheads downstream from the first set of printheads. The printed job is exposed to an array of controllable illumination elements. The array of illumination elements is controlled to apply a drying illumination to the imaged segments and the image-adjacent segments of the printed print job, without providing the drying illumination to the remote segments.

Abstract: Herein is described a piezo-jettable varnish composition comprising a latex polymer having a weight averaged molecular weight Mw of greater than about 50 000, a polymeric salt derived from an acidic polymer having a weight averaged molecular weight Mw in the range of about 1000 to about 50 000, water, and a co-solvent, wherein, the latex polymer and polymeric salt are present in amounts such that the ratio of latex polymer to polymeric salt by weight is in the range of greater than about 1:1 to about 8:1.

Abstract: In an example, apparatus includes a first radiation source to output radiation at a first waveband and a second radiation source to output radiation at a second waveband, which is different from the first waveband. The apparatus may receive a medium having marked thereon a first colorant and a second colorant and the first and second wavebands may be selected such that an energy absorbance efficiency of the first colorant is higher than that of the second colorant at the first waveband and an energy absorbance efficiency of the second colorant is higher than that of the first colorant at the second waveband.

Abstract: A method of printing a print media comprises printing an image onto a surface of a print media, and applying a protective coating over the surface of the print media using an analog printing process, wherein the protective coating comprises a plurality of micro openings.

Abstract: In an example, a printer ink dryer unit comprises at least one ultraviolet light source to dry a printer ink layer by causing evaporation of a solvent fluid therefrom.

Abstract: According to examples, there is provided a suction device, system and method for retaining media on a surface. The suction device comprising a suction cup having a vacuum port for coupling the suction cup to a vacuum source, a sealing piston configured to seal the vacuum port when the sealing piston is in a first position, wherein when the sealing piston is in a second, depressed, position the vacuum source is coupled to the suction cup the sealing piston further comprising a piston head extending above a rim of the suction cup when the sealing piston is in the first position, and a biasing element to bias the sealing piston to the first position.

Abstract: In an example of the disclosure, a cleaning system for a printhead includes a web of material movable in a web direction. The web has a first side for wiping a printhead face. The cleaning system includes a dispensing apparatus to dispense a liquid upon the web. The cleaning system includes a scraper element for scraping liquid from the web and includes a collector element with a trough. The collector element is to cause collection of liquid scraped from the web to collect in the trough. The cleaning system includes a pusher element to push against the second side of the web and thereby cause the first side of the web to wipe the printhead face.

Abstract: Certain examples described herein relate to transporting sheets of print media. In one example, a media transport apparatus has a plurality of media transport sections including a first media transport section and a second media transport section offset from the first media transport section in a media transport direction. The media transport apparatus has a holding section arranged to receive a sheet of print media from the first media transport section. The holding section is moveable to deposit the sheet of print media upon the second media transport section.

Abstract: A printer drying device includes a first drying unit having a first row of energy emitting elements to dry a printing substance on a printing medium, the energy emitting elements connected in series along a medium transport direction of the printing medium; and a second drying unit having a second row of energy emitting, the energy emitting elements of the second row being connected in series along the medium transport direction and being located downstream in the medium transport direction from the first row of energy emitting elements. The first and second drying units are electrically connected in parallel.

Abstract: In an example, apparatus includes a first radiation source to output radiation at a first waveband and a second radiation source to output radiation at a second waveband, which is different from the first waveband. The apparatus may receive a medium having marked thereon a first colorant and a second colorant and the first and second wavebands may be selected such that an energy absorbance efficiency of the first colorant is higher than that of the second colorant at the first waveband and an energy absorbance efficiency of the second colorant is higher than that of the first colorant at the second waveband.

Abstract: In one example, a media support includes a sheet of elongated suction cups. In another example, a media support includes an arrangement of elongated and/or circular suction cups in which the density of the suction cups varies between different parts of the support.

Abstract: In an example, apparatus includes a first radiation source to output radiation at a first waveband and a second radiation source to output radiation at a second waveband, which is different from the first waveband. The apparatus may receive a medium having marked thereon a first colorant and a second colorant and the first and second wavebands may be selected such that an energy absorbance efficiency of the first colorant is higher than that of the second colorant at the first waveband and an energy absorbance efficiency of the second colorant is higher than that of the first colorant at the second waveband.

Abstract: In an example of the disclosure, a printhead is caused to spit a liquid into a main cavity of a container. The container includes an overflow pocket for collecting liquid that has overflown from the main cavity. A sensor is caused to detect whether liquid is present in the overflow pocket. Responsive to sensor detection that liquid is present in the overflow pocket, a warning or instruction message is caused to be sent for user consumption.

Abstract: In one example of the disclosure, a system includes a chamber having an inlet to receive a print agent, an actuator operatively connected to the chamber, and a set of nozzles fluidly coupled to the chamber. The nozzles are orientated such that each nozzle of the set has a same boundary condition.

Abstract: Herein is described a method of applying foil from a foil web to a substrate. The method may comprise: ink-jet printing a UV-curable adhesive onto the substrate in a predetermined image area; subjecting the adhesive to a first curing by exposing the adhesive to UV light in a dosage range of 140-170 mJ/cm2; passing the substrate and a foil web through a nip where the foil web is pressed against the adhesive; subjecting the adhesive disposed between the substrate and the foil web to a second curing by exposing the adhesive to UV light in a dosage of at least 250 mJ/cm2; and separating excess foil from the substrate, to leave foil on the predetermined image area. Substrates and UV-curable adhesives are also described.

Abstract: In an example, a halftone screen is generated. A plurality of amplitude-modulated dot clusters is arranged in correspondence with a grid. Each of the amplitude-modulated dot clusters comprises a plurality of frequency-modulated dots.

Abstract: In an example, a print head includes a nozzle, a fluid channel to provide printing fluid to the nozzle and a Light Emitting Diode (LED). The LED may emit light to heat printing fluid in the fluid channel causing localised vaporisation of the printing fluid and ejection of a fluid drop through the nozzle.

Abstract: A method may include positioning first and second printhead die within a die carrier, using a registration pin of the die carrier to align the first and second printhead die and fixing the position of the first and second printhead die within the die carrier.