Vent in a micro electro-mechanical device

B - Operations – Transporting – 81 – B

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B81B 7/02 (2006.01) B41J 2/14 (2006.01) B41J 2/19 (2006.01)

Patent

CA 2414739

A micro electro-mechanical device embodied within an ink ejection nozzle (13) having an actuating arm (28) that is caused to move an ink displacing paddle (27) when heat inducing electric current is passed through the actuating arm is disclosed. The paddle is located in an ink chamber (24) and the actuating arm passes through an actuator aperture (54) in the chamber. The actuating arm including the paddle is moved to eject a droplet (D). The chamber includes a plurality of vents (5) for venting to atmosphere air bubbles which may form in the chamber when the device operates to eject droplets of ink.

L'invention concerne un dispositif électromécanique miniaturisé qui comprend une buse d'éjection d'encre (13) avec un bras d'actionnement (28) qui déplace une palette d'agitation d'encre (27) lorsqu'un courant électrique induisant la chaleur passe à travers le bras d'actionnement. La palette est disposée dans une chambre à encre (24), et le bras d'actionnement passe à travers l'ouverture d'actionneur (54) et fait saillie dans la chambre. Le bras d'actionnement comportant une palette se déplace pour éjecter une gouttelette (D). La chambre comprend plusieurs évents (5) destinés à éjecter dans l'atmosphère des bulles d'air qui peuvent se former dans la chambre lorsque le dispositif fonctionne de manière à éjecter des gouttelettes d'encre.

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