Abstract: A print module includes: a body housing first and second opposed printed circuit boards (PCBs), each of the first and second PCBs having heat-generating electronic components; an air inlet and an air outlet positioned towards an upper part of the body; an air pathway extending between the air inlet and the air outlet; a plurality of heatsinks, each heatsink being thermally coupled with one of the heat-generating components and having an array of cooling fins extending into the air pathway; and an inkjet printhead receiving power and print data from at least one of the first and second PCBs. The inkjet printhead is positioned toward a lower part of the print module.

Abstract: An inkjet nozzle device includes a MEMS structure in contact with ink, wherein a tantalum oxide layer is deposited on at least part of the MEMS structure for inhibiting corrosion by the ink.

Abstract: An inkjet printhead includes: an elongate fluid manifold having a plurality of fluid outlets positioned longitudinally along a base of the fluid manifold; one or more printhead chips attached to the base of the fluid manifold, each printhead chip receiving printing fluid from one or more fluid outlets. Each fluid outlet is laterally flared towards a longitudinal edge of a respective printhead chip.

Abstract: An inkjet printhead including: an elongate fluid manifold comprising: an inlet boss, an outlet boss, a longitudinal channel extending between the inlet and outlet bosses, a plurality of air cavities positioned above the longitudinal channel in a roof cavity of the fluid manifold, and plurality of fluid outlets defined in a floor of the longitudinal channel; and a plurality of printhead chips attached to the base of the fluid manifold, each printhead chip receiving printing fluid from one or more fluid outlets. The air cavities are defined by ribs extending from a roof of the fluid manifold towards the longitudinal channel and each rib has a lip protruding beyond a lower surface of the inlet and outlet bosses.

Abstract: A multi-color printer has an array of monochrome fixed inkjet printheads aligned in a media feed direction. The printer includes: a first printhead positioned furthest upstream relative to the media feed direction; a second printhead positioned furthest downstream relative to the media feed direction; and a third printhead positioned between the first and second printheads. Each printhead is supplied with a respective ink from a multi-color ink set, the first printhead being supplied with a lowest luminance ink of the ink set and the third printhead being supplied with a highest luminance ink of the ink set.

Abstract: A method of capping a plurality of printheads positioned in a staggered overlapping arrangement across a width of a media feed path. Each printhead has a respective capper. The method includes the steps of: moving the cappers towards respective printheads in a direction parallel to a media feed direction; and lowering the printheads onto their respective cappers. The cappers for neighboring printheads are moved in opposite directions towards their respective printheads.

Abstract: A method of inkjet printing includes the steps of: printing a first ink onto a print medium, the first ink including a first self-dispersible pigment, the first ink having a first pigment content A; and subsequently printing a second ink onto the print medium at least partially over the first ink, the second ink including a second pigment and a polymeric dispersant encapsulating the second pigment, the second ink having a second pigment content B. The first self-dispersible pigment and the second pigment have a same color; the pigment content A of the first ink and the pigment content B of the overprinted second ink have a relationship 0.8?A/B?1.2; and a polymer acid value of the polymeric dispersant is in the range of 100 to 170.

Abstract: An inkjet printhead assembly includes: a support structure having a recess, the recess having a wall defining a plurality of ink supply apertures; and a plurality of print modules received in the recess in a neighboring arrangement. Each print module includes: a printhead chip carrier having a plurality of convergent ink galleries, each ink gallery receiving ink from an ink supply aperture; and a single printhead chip mounted on the printhead chip carrier, the printhead chip receiving ink from the plurality of convergent ink galleries.

Abstract: A method of wiping a plurality of printheads positioned in a staggered overlapping arrangement across a width of a media feed path, each printhead having a respective wiper associated therewith. The wipers for neighboring printheads are moved in opposite directions with respect to each other.

Abstract: A method of printing from an inkjet nozzle device having a thermal actuator. The method includes the steps of supplying a fluid to the inkjet nozzle device, the fluid comprising an acetylenic compound; and repeatedly actuating the thermal actuator so as to eject fluid droplets from a nozzle opening of the inkjet nozzle device. The acetylenic compound is present in an amount sufficient to increase the lifetime of the inkjet nozzle device.

Abstract: A printer includes: a printhead assembly having a print zone and a belt assembly for feeding print media past the print zone in a media feed direction. The belt assembly includes: an endless belt tensioned between a first roller upstream of the print zone and a second roller downstream of the print zone; a drive mechanism for moving the endless belt in the media feed direction; and a fixed platen positioned in the print zone. The endless belt is guided around and below the fixed platen.

Abstract: A printer includes: a platen; a printhead assembly having an inkjet printhead operatively positioned opposite the platen; a feed mechanism for feeding a web of print media over the platen and along a printing feed path; and a diverter configured for periodically diverting a portion of the web towards the printhead assembly and along a maintenance feed path. The portion of the web diverted along the maintenance feed path wipes part of the printhead assembly and removes condensation.

Abstract: An inkjet ink includes: (i) a disazo dye of formula (I): (ii) a glycol compound selected from the group consisting of: triethylene glycol, tetraethylene glycol and pentaethylene glycol; and (iv) water.

Abstract: An Inkjet printer includes: an inkjet printhead having an exposed corrodible structure containing silicon nitride, borophosphosilicate glass (BPSG) or silicon oxide; and an ink reservoir containing said ink which is in fluid communication with said printhead. The ink includes: water; a dye; and a metal additive for minimizing corrosion of the exposed structure.

Abstract: A printhead is provided having an elongate support having a plurality of internal webs protruding from a base section to define a plurality of parallel fluid supply channels, a shim supported by the support and defining a plurality of rows of openings through which fluid from respective supply channels is supplied, and a plurality of elongate printhead modules supported serially on the shim. Each module defines a plurality of fluid supply passages through which fluid passes to fluid ejection nozzles from respective rows of the openings. Either end of each module defines complementary formations such that adjacent modules nest together.

Abstract: A process for filling one or more etched holes defined in a frontside surface of a wafer substrate. The process includes the steps of: (i) depositing a layer of a thermoplastic first polymer onto the frontside surface and into each hole; (ii) reflowing the first polymer; (iii) exposing the wafer substrate to a controlled oxidative plasma; (iv) optionally repeating steps (i) to (iii); (v) depositing a layer of a photoimageable second polymer; (vi) selectively removing the second polymer from regions outside a periphery of the holes using exposure and development; and (vii) planarizing the frontside surface to provide holes filled with a plug comprising the first and second polymers, which are different than each other. Each plug has a respective upper surface coplanar with the frontside surface.

Abstract: A printhead assembly includes an ink distribution assembly including an ink distribution molding, the ink distribution molding including a plurality of first ducts; at least one printhead integrated circuit in fluid communication with the ink distribution assembly; and a rotary platen having at least three surface, each surface for providing one of a platen surface, capping portion, and a blotting portion. The ink distribution assembly further includes a plurality of second ducts acutely angled with respect to the plurality of first ducts, a plurality of transfer ports facilitating fluid communication between the plurality of first ducts and the plurality of second ducts, and a plurality of ink inlet ports facilitating fluid communication between an ink cassette and the plurality of first ducts.

Abstract: A method of ejecting an ink droplet from an inkjet nozzle device having an actuator and a meniscus pinned across a nozzle opening. The method includes the steps of: delivering a sub-ejection pulse to the actuator for perturbing the meniscus from a quiescent state; and subsequently delivering an ejection pulse to the actuator at an instant when the meniscus is perturbed from its quiescent state, the ejection pulse ejecting the ink droplet from the nozzle opening. A time period between a trailing edge of the sub-ejection pulse and a leading edge of the ejection pulse controls a droplet volume of the ejected ink droplet.

Abstract: An inkjet nozzle device includes a resistive heater element for ejecting ink droplets through a nozzle opening. The resistive heater element includes: an aluminide layer having a native passivating oxide and a tantalum oxide layer disposed on the native passivating oxide of the aluminide layer. The tantalum oxide layer is a relatively thin layer, which may be deposited using atomic layer deposition.

Abstract: A pinch valve includes first and second pinch arms pivotally mounted about respective pivot axes. A spring interconnects the first and second pinch arms to mutually bias the pinch arms towards each other and provide a pinching force for pinching respective first and second conduits. A cam engages with each of the pinch arms and provides an unpinching force for either one of the pinch arms against the bias of the sprint.