Printer with printhead having moveable ejection port
AssigneeSilverbrook Research Pty Ltd
InventorsKia Silverbrook, Gregory John McAvoy
Life of this patent
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Abstract
A printer has an inkjet printhead formed on a wafer substrate. Formed in the wafer are a plurality of nozzle chambers for storing ink to be ejected. Each of the nozzle chambers has an outer wall defining an ink ejection port. In use, actuators cause the ink ejection port to move inward causing ink to be ejected through the nozzle. The actuators include a surface which bends inwards away from the centre of the nozzle chamber upon actuation and a thermal actuator device having a conductive resistive heating element encased within a material having a high coefficient of thermal expansion.
Claims9
A printer including at least one inkjet printhead for printing on a media substrate, the printhead comprising:
- a wafer substrate defining a plurality of nozzle chambers for storing ink to be ejected, each of the nozzle chambers having an outer wall that faces the media substrate during use, the wall having an ink ejection port and a plurality of actuators in the wall for moving the ink ejection port away from the media substrate to eject ink from the corresponding nozzle chamber via the ink ejection port, wherein the actuators include a surface which bends inwards away from the centre of the nozzle chamber upon actuation, and wherein the actuators are actuated by means of a thermal actuator device having a conductive resistive heating element encased within a material having a high coefficient of thermal expansion.
Dependencies are inferred from the claim text.