Patent ID: 7229154
Filing Date: 2007-06-12
Classification: B05D,B41J,Y10T

Abstract:
1. An ink ejection nozzle for an inkjet printer, the nozzle comprising: a chamber for holding ink, the chamber having a roof structure defining an opening; a thermal bend actuator for ejecting droplets of ink from the chamber through the opening, the bend actuator being configured as a cantilever with one end of the cantilever anchored to a base and the opposite end supporting a paddle, the actuator having a deflector section constructed of a material having a high coefficient of thermal expansion and a barrier layer constructed of a dielectric material having low thermal conductivity; wherein the deflector section causes differential thermal expansion between the deflector section and the barrier layer in response to an activation signal such that the actuator bends and the paddle ejects a droplet of ink from the nozzle.