Sii Printek Inc.

Seiko I Infotech Inc.

Kentaro Suzuki

Osamu Koseki

Kazuyoshi Tominaga

Yuji Nakamura

Jun Tsuneyoshi

Yasuhito Sekiya

Tomiharu Makishima

Masaki Denda

An ink jet recording apparatus has an ink jet head mounted for movement in a scanning direction to record on a surface of a recording medium using an active ray curing type ink. An active ray irradiation device is disposed adjacent to the ink jet head for irradiating an active ray to cure the ink on the surface of the recording medium. A plate is mounted to undergo movement in the scanning direction of the inkjet head for preventing an active ray from the active ray irradiation device and reflected by the platen from entering in ink discharge surface of the ink jet head. The plate is disposed adjacent to an end portion of the recording medium and in an arbitrary position between a surface lying substantially on the same plane as the surface of the recording medium and the ink discharge surface of the ink jet head. A plate position adjusting mechanism and a head position adjusting mechanism are provided for moving the plate and the ink jet head, respectively, in a direction orthogonal to the recording medium.

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

Growing community of inventors

Chiba, Japan

Kentaro Suzuki