INK DROP EJECTION DEVICE WITH NON-BUCKLING HEATER ELEMENT

摘要

A ink drop ejection device 3 that has a nozzle 5 and a bubble forming chamber 7 for holding ejectable liquid. At least one heater element 10 is suspended in the bubble forming chamber 7 to heat the ejectable liquid 11 to a temperature above its boiling point to form a gas bubble 12 therein. The generation of the bubble 12 causes the ejection of a drop 16 of the ejectable liquid (such as ink) through the nozzle 5 to effect printing. The heater element is configured such that the strain of thermal expansion is not relieved by bending about its thinnest cross sectional dimension.