Patent ID: 7469996
Filing Date: 2008-12-30
Classification: B41J

Abstract:
1. An inkjet printhead comprising: a plurality of nozzles, each defining a nozzle aperture with a nozzle axis extending through the center of the nozzle aperture and normal to the nozzle aperture; a bubble forming chamber corresponding to each of the nozzles respectively; an inlet to supply the bubble forming chamber with liquid, the inlet being spaced from the nozzle axis; a heater element disposed in each of the bubble forming chambers respectively, the heater element configured as a beam suspended at its ends for immersion in the liquid supplied by the inlet such that heating the heater element forms a gas bubble that ejects a drop of the liquid through the nozzle corresponding to that heater element; wherein, the heater element is configured to nucleate the gas bubble at a point closer to the nozzle axis than the spacing between the inlet and the nozzle axis.