| 摘要 |
<p>A printhead 20 comprises a chamber 22; an actuator element 30 located outside the chamber 22; and a separator element 26 located between the chamber 22 and the actuator element 30. The actuator element 30 is coupled to an obturator 31. A portion of the obturator 31 is located within the chamber 22 and operable to move from a first position inside the chamber 22 to a second position inside the chamber 22 on actuation of the actuator element 30. The actuator element 30 is isolated from the fluid chamber 22 during printing. The actuator element 30 may be a piezoelectric element.</p> |
