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Nobutaka Kajiura

Tadamasa Fujimura

Toshiharu Suganuma

There is provided an ink jet head to transmit a shock wave propagated by an oscillator plate to the ink discharge orifice without significant power-loss for ink ejection. An ink jet head has a body ( ) having an oscillator plate with an outer surface ( ) and an inner surface ( ), the inner surface being parallel to the outer surface. The ink jet head also has an ink pressuring chamber formed in the body between the inner surface and an opposed lower wall ( ), the lower wall being angled relative to the inner surface. The ink jet head also has an ink feed chamber formed in the body. The ink jet head also has an ink feed passage formed in the body communicating between the ink feed chamber and the ink pressuring chamber, the ink feed passage having an ink feed orifice opening into the ink pressuring chambers. The ink jet head also has an ink discharge passage formed through the lower wall of the body communicating with a discharge orifice on the lower wall, the ink discharge passage having an inlet at the ink pressuring chamber and terminating at the discharge orifice, the ink discharge passage being continuously narrowed from the ink pressuring chamber to the discharge orifice.

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Abiko, Japan

Nobutaka Kajiura