Fluid flow restriction in an inkjet printhead
First Claim
Patent Images
1. An inkjet printhead apparatus comprising:
- a plurality of nozzle chambers each having a nozzle aperture defined in one wall thereof for the ejection of ink out of said chamber and a second aperture for the insertion of an actuator mechanism;
an ink supply channel interconnected with said nozzle chamber;
a paddle moveable by an actuator operable to eject ink from said nozzle chamber, said actuator including;
a first portion located externally of said nozzle chamber and a second portion located internally of said nozzle chamber, supporting said paddle;
an interconnecting portion interconnecting said first portion and said second portion through said second aperture, said interconnecting portion further including a protruding shield formed adjacent said second aperture and positioned so as to restrict the flow of fluid through said second aperture.
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Abstract
An inkjet printhead, typically constructed by a MEMS process, includes a large number of nozzle chambers with ink ejection nozzle apertures and a paddle moveable in each chamber by an actuator to deliver ink through the nozzle. Each actuator extends through an aperture in a side wall of the nozzle chamber and is provided with a shield to inhibit leaking or wicking of ink from the chamber.
65 Citations
5 Claims
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1. An inkjet printhead apparatus comprising:
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a plurality of nozzle chambers each having a nozzle aperture defined in one wall thereof for the ejection of ink out of said chamber and a second aperture for the insertion of an actuator mechanism;
an ink supply channel interconnected with said nozzle chamber;
a paddle moveable by an actuator operable to eject ink from said nozzle chamber, said actuator including;
a first portion located externally of said nozzle chamber and a second portion located internally of said nozzle chamber, supporting said paddle;
an interconnecting portion interconnecting said first portion and said second portion through said second aperture, said interconnecting portion further including a protruding shield formed adjacent said second aperture and positioned so as to restrict the flow of fluid through said second aperture. - View Dependent Claims (2, 3, 4, 5)
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Specification