Thermal Printhead With Heater Element And Nozzle Sharing Common Plane Of Symmetry

摘要

An ink jet printhead that has a nozzle aperture 3 that defines a planar opening having two planes of symmetry, both of which extend perpendicular to the plane of the opening. The printhead also having a chamber configured to receive a supply of printing fluid and a heater element disposed in the chamber to generate a gas bubble in the printing fluid that ejects a drop of the printing fluid through the nozzle aperture. The heater element is a suspended beam that has two planes of symmetry and at least one of the heater element planes of symmetry is common to one of the nozzle aperture plane of symmetry.