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Ink Jet Printer Head Disclosure Number: IPCOM000043393D
Original Publication Date: 1984-Aug-01
Included in the Prior Art Database: 2005-Feb-04

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Usui, H Yamazaki, T [+details]


This article describes an on-demand-type ink jet print head which has a fluid activator located at the ink inlet port of the ink cavity. The fluid activator moves ink into the ink cavity to maintain ink meniscus at the outer edge of the nozzle after pressurized ink in the ink cavity is broken up into droplets at nozzle. Fig. 1 shows the concept of this article. The ink jet print head 1 includes an ink cavity 2, an ink inlet port 3, an nozzle 4 and a piezoelectric transducer 5. The piezoelectric transducer 5 periodically produces pressure waves in the ink within the ink cavity 2 to break up the ink into the droplets. More particularly, during period (a), meniscus 6 of the ink is maintained at the outer edge of the nozzle 4.