Sii Printek Inc.

Masaki Denda

Osamu Koseki

Kazuyoshi Tominaga

Jun Tsuneyoshi

Yasuhito Sekiya

Tomiharu Makishima

Yuji Nakamura

Kentaro Suzuki

Yuuji Nakamura

Kentarou Suzuki

An ink-jet print head has a piezoelectric ceramic plate having grooves for receiving ink, a nozzle plate connected to the piezoelectric ceramic plate and having nozzle apertures each disposed in communication with respective ones of the grooves, and an ink storing device for storing ink. An ink chamber plate is connected to the piezoelectric ceramic plate and has an ink chamber for supplying ink from the ink storing device to the grooves. A base plate is connected to a side of the ink chamber plate and has an ink reservoir defining a portion of an ink flow path for transporting ink from the ink storing device to the ink chamber of the ink chamber plate. The ink reservoir has at least one tapered portion progressively diverging in a direction toward the ink chamber of the ink chamber plate.

Ink-jet print head and ink-jet recording apparatus

To provide an ink jet head and an ink jet recording apparatus in which it is possible to reliably prevent ink bubbles from staying in the ink sump and the interior of the head chip and in which it is relatively easy to remove the bubbles. The ink jet head includes: a plurality of grooves arranged side by side so as to communicate with nozzle openings; an ink chamber for supplying ink to each of the grooves; an ink sump provided so as to communicate with the ink chamber; and ink storage unit ( ) communicating with the ink sump through ink supply passages, in which there is provided an air duct ( ) establishing communication between a region in the ink sump which is substantially free from interference with an ink flow from the ink supply passages ( ) to the ink chamber and in which bubbles easily gather and an air region of the ink storage unit ( ). Therefore, the bubbles in the ink can be surely removed.

Ink jet head and ink jet recording apparatus

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Chiba, Japan

Masaki Denda