This patent describes ink jet printing device that utilizes a shape memory alloy such as a nickel titanium alloy for ejecting drops. The ejection involves utilization of the transformation of a shape memory alloy from its martensitic phase to its austenitic phase (or vice versa) as an actuator to cause...http://www.google.de/patents/US6557977?utm_source=gb-gplus-sharePatent US6557977 - Shape memory alloy ink jet printing mechanism
