Inkjet printhead unit cell with heater element

Details Inkjet printhead unit cell with heater element Inkjet printhead unit cell with heater element

2009-02-11

2011-10-18

Luu, Matthew (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S061000, C347S062000, C347S063000

Reexamination Certificate

active

08038262

ABSTRACT:
A unit cell for an inkjet printhead includes a substrate that defines an ink inlet passage, the substrate incorporating drive circuitry. Side walls are arranged on the substrate. A nozzle plate is arranged on the side walls such that the nozzle plate and the side walls define an ink chamber in fluid communication with the inlet passage. The nozzle plate defines an aperture in fluid communication with the ink chamber. A heater element is connected to the drive circuitry. The heater element is configured to generate a bubble of ink to be ejected from the aperture on receipt of an electrical signal from the drive circuitry. The heater element is suspended in the ink chamber such that, when ink is supplied to the chamber, the heater element is immersed in the ink. The heater element is configured so that a collapse point of the bubble is at a position spaced from the heater element.

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