| 摘要 |
A micro electro-mechanical device for ink jet printers has a liquid-containi ng nozzle chamber (12) and a movable component (20, 22) [thermal actuator structure] extending into the chamber. Difficulties exist in sealing such a device against movement of the liquid through an opening through which the actuator extends. This difficulty is resolved by shaping the actuator (20, 2 2) in such a way as to induce the formation and maintenance between the wall of the chamber and the actuator (20, 22). The first portion (20) of the actuato r is located substantially within the nozzle chamber and the second portion (2 2) is located outside the nozzle chamber. The stem portion (26) of the second portion (22) is connected by a shoulder (28) to an end portion (30) of the first actuator portion (20). A meniscus formed between the step (26) and the outer edges (36) forms a seal preventing liquid from inside the chamber to leak through.
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