Inkjet printhead with nozzle pokers
First Claim
Patent Images
1. An inkjet printhead comprising:
- a plurality of nozzle chambers, each having a nozzle aperture defined in one wall thereof for the ejection of ink out of said aperture;
an ink supply channel interconnected with said nozzle chamber;
a paddle moveable within the nozzle chamber by an actuator and operable to eject ink from said nozzle chamber, said paddle having a projecting part which, upon operation of said actuator is caused to move towards said nozzle aperture.
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Abstract
An inkjet printhead, typically constructed by 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 paddle is provided with a projecting poker, concentrically protruding through the nozzle aperture when actuated to inhibit clogging of the nozzle.
36 Citations
10 Claims
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1. An inkjet printhead 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 aperture;
an ink supply channel interconnected with said nozzle chamber;
a paddle moveable within the nozzle chamber by an actuator and operable to eject ink from said nozzle chamber, said paddle having a projecting part which, upon operation of said actuator is caused to move towards said nozzle aperture. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. In an inkjet printhead having at least one chamber from which liquid is ejected from a nozzle aperture interconnected with said chamber by means of movement of a liquid ejection paddle, a method of improving the operational characteristics of said printhead comprising the steps of:
locating a projecting part on said moveable paddle, said projecting part undergoing movement towards said nozzle aperture upon activation of said liquid ejection paddle to eject liquid. - View Dependent Claims (9, 10)
Specification