Oliff & Berridge
Ink ejecting device having alternating ejecting channels and non-ejecting channels
 An ink ejecting device includes ink channels intercommunicating with slits and air channels intercommunicating with another slits. The ink channels and the air channels have a narrow shape with a rectangular cross-section, and all of the ink channels are filled with ink and the air channels are filled with air. An LSI chip applies a voltage V to a pattern conducting to metal electrodes positioned in air channels located at both sides of an ink channel from which the ink is to be ejected and connects the other patterns connected to metal electrodes in other air channels not adjacent the ejecting ink channel and a pattern conducting to the metal electrodes of the non-ejecting ink channels to a ground line. Therefore, the ink ejecting device of the above structure requires no insulation between ink and electrodes as the working electrodes do not contact the ink. 
Brother Kogyo Kabushiki Kaisha
B B B B B B
B41J B41J B41J B41J B41J B41J
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Hiroto Qiming Hiroki
Sugahara Zhang Asai