Abstract: A printing unit includes: a unit chassis having a pair of side bars interconnected by a pair of end bars; first and second print modules mounted on the unit chassis, each print module having a respective printhead and an associated print zone; an aerosol extractor providing an airflow through the print zones; and an interstitial bar positioned in a space between the printheads. The interstitial bar is configured to modulate the airflow through the print zones.

Abstract: A printing unit includes: a height-adjustable print module including a printhead for printing onto a media surface; and a resilient flap positioned for engagement with part of the print module. In use, movement of the print module towards the media surface into a printing position forms a seal between the print module and the flap for printing.

Abstract: A printhead assembly includes: an ink manifold comprised of a first metal; printhead chips mounted on the ink manifold and receiving ink therefrom, each printhead chip having a plurality of bond pads; a PCB mounted on the ink manifold, the PCB having a plurality of contact pads; a plurality of wirebonds interconnecting the bond pads and the contact pads, the wirebonds being comprised of a second metal; an encapsulant material encapsulating the wirebonds, the bond pads and the contact pads; and a voltage source. The ink manifold and the wirebonds are electrically connectable to the voltage source to provide cathodic protection of the wirebonds.

Abstract: An electronic assembly includes a substrate having a die and PCB mounted thereon. Wirebonds interconnect bond pads of the die with contact pads of the PCB, each wirebond having a first end portion bonded to a respective bond pad, an opposite second end portion bonded to a respective contact pad and an intermediate section extending between the first and second end portions. A dam encapsulant encapsulates each of the first and second end portions, a first fill encapsulant contacts the substrate and the dam encapsulant; and a second fill encapsulant overlies the first fill encapsulant. The first fill encapsulant has a lower modulus of elasticity than the second fill encapsulant and the dam encapsulant.

Abstract: An inkjet nozzle device includes: a bubble chamber having a heating element for generating a vapour bubble and an orifice positioned for communicating an impulse from the vapour bubble; a first inlet for supplying a first fluid to the bubble chamber; an ejection chamber having a roof defining a nozzle and an adjoining wall between the ejection chamber and the bubble chamber, the adjoining wall defining the orifice; and a second inlet for supplying a second fluid to the ejection chamber. In use, the first and second fluids form a fluidic interface at the orifice and the vapour bubble provides the impulse to the second fluid in the ejection chamber via the orifice, such that the impulse ejects the second fluid from the nozzle.

Abstract: A printhead assembly includes: an ink manifold comprised of a first metal; printhead chips mounted on the ink manifold and receiving ink therefrom, each printhead chip having a plurality of bond pads; a PCB mounted on the ink manifold, the PCB having a plurality of contact pads; a plurality of wirebonds interconnecting the bond pads and the contact pads, the wirebonds being comprised of a second metal; an encapsulant material encapsulating the wirebonds, the bond pads and the contact pads; and a voltage source. The ink manifold and the wirebonds are electrically connectable to the voltage source to provide cathodic protection of the wirebonds.

Abstract: An electronic assembly includes a substrate having a die and PCB mounted thereon. Wirebonds interconnect bond pads of the die with contact pads of the PCB, each wirebond having a first end portion bonded to a respective bond pad, an opposite second end portion bonded to a respective contact pad and an intermediate section extending between the first and second end portions. A dam encapsulant encapsulates each of the first and second end portions, a first fill encapsulant contacts the substrate and the dam encapsulant; and a second fill encapsulant overlies the first fill encapsulant. The first fill encapsulant has a lower modulus of elasticity than the second fill encapsulant and the dam encapsulant.

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: 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 nozzle device includes: a nozzle chamber having a floor, a roof and perimeter sidewalls extending between the floor and the roof, wherein a nozzle aperture is defined in the roof; a heating element for generating gas bubbles in the nozzle chamber so as to eject ink through the nozzle aperture, wherein a centroid of the heating element is aligned with a centroid of the nozzle aperture; and a pair of chamber inlets defined in the floor of the nozzle chamber, the chamber inlets being symmetrically disposed about the centroid of the heating element. The inkjet nozzle device has a pair of orthogonal symmetry planes passing through the centroid of the nozzle aperture.

Abstract: An inkjet nozzle device includes: a firing chamber having a nozzle aperture; and a heating element for generating gas bubbles in the firing chamber so as to eject ink through the nozzle aperture. A non-heating stabilizing bar extends across the nozzle aperture.

Abstract: An inkjet nozzle device includes: a firing chamber having a nozzle aperture; and a heating element for generating gas bubbles in the firing chamber so as to eject ink through the nozzle aperture. A non-heating stabilizing bar extends across the nozzle aperture.

Abstract: An inkjet nozzle device includes: a nozzle chamber having a floor, a roof and perimeter sidewalls extending between the floor and the roof, wherein a nozzle aperture is defined in the roof; a heating element for generating gas bubbles in the nozzle chamber so as to eject ink through the nozzle aperture, wherein a centroid of the heating element is aligned with a centroid of the nozzle aperture; and a pair of chamber inlets defined in the floor of the nozzle chamber, the chamber inlets being symmetrically disposed about the centroid of the heating element. The inkjet nozzle device has a pair of orthogonal symmetry planes passing through the centroid of the nozzle aperture.

Abstract: An axial flow rotary valve for an engine, that is rotatable about an axis within the bore of a cylinder head. The valve communicating with a respective cylinder in which a piston reciprocates, and an ignition means associated with the cylinder. The valve is provided with inlet and exhaust peripheral openings that periodically communicate with cylinder through a window in the bore. A combustion chamber is formed in the space between the crown of the piston at top dead centre and the cylinder head and the valve. The ignition means comprising first and second spark plugs, each of said spark plugs having a nose located at one end thereof exposed to the combustion chamber, said noses being disposed on opposite sides of said window within the axial extremities of said window.