| abstract |
An ink ejection nozzle has an ink reservoir with an oscillator configured to oscillate ink pressure in the reservoir. A wafer assembly defines an ink supply channel in fluid communication with the ink reservoir. A nozzle chamber structure on the wafer assembly defines a nozzle chamber in fluid communication with the ink supply channel. An ink ejection port is in fluid communication with the nozzle chamber. A shutter is positioned in the nozzle chamber and is configured to shut the ink ejection port to the ejection of ink from the nozzle chamber. |