Abstract: An inkjet printhead comprising: an array of ink chambers, each having a nozzle, an elongate actuator for ejecting ink through the nozzle; wherein, the nozzle has an elongate shape with its long dimension aligned with that of the elongate actuator.

Abstract: An inkjet printhead comprising: an array of ink chambers, each having a nozzle, a droplet stem anchor and an actuator for ejecting ink through the nozzle; wherein during use, the ink ejected from the nozzle is attached to the droplet stem anchor by an ink stem until the stem breaks so that the ejected ink forms a separate drop.

Abstract: An inkjet printhead comprising: an array of ink chambers, each having a nozzle and a thermal actuator for generating vapour bubbles to eject ink through the nozzle; wherein, the thermal actuator has a pair of contacts and at least two parallel current paths between the contacts, each of the current paths having a plurality of heater elements for nucleating a vapour bubble.

Abstract: An inkjet printhead comprising: an array of ink chambers, each having a nozzle and an actuator for ejecting ink through the nozzle; wherein during use, the actuator initiates a quadrupole pressure pulse that is symmetrical about two orthogonal axes parallel to the plane of the nozzle, the orthogonal axes intersecting a mutually orthogonal axis extending through the centre of the nozzle.

Abstract: An inkjet printhead comprising: an array of nozzles; a plurality of actuators for ejecting ink through the nozzles such that a bulb of ink attached to a droplet stem forms prior to drop separation when the stem breaks; a plurality of droplet stem anchors positioned between adjacent actuators; wherein during use, the adjacent actuators eject ink simultaneously and the droplet stem anchors combine the ink simultaneously ejected by the adjacent nozzles into a single drop.

Abstract: An inkjet printhead comprising: an array of ink chambers, each having a nozzle and a plurality of heater elements for generating vapour bubbles to eject ink through the nozzle, the heater elements being suspended for immersion in the ink; and, a cross bracing structure for maintaining the spacing between the heater elements.