Olympus Corporation

Olympus Optical Company, Ltd.

Ortek Corporation

Kaoru Horie

Masanobu Shimizu

Toshihiro Kitahara

Takashi Miyazawa

Hiroshi Hashi

Takahisa Yamada

Takashi Matsuyama

Motoharu Miki

Keiji Izumi

An ink-jet recording apparatus is provided with an ink tank, a recording head, an ink passage extending from the ink tank to the recording head, and a sub-tank arranged on the ink passage. The apparatus has a first ink passage, a second ink passage, and an ultrasonic transducer. The first ink passage supplies ink from the ink tank to the sub-tank. The second ink passage has an ink outlet port, through which the ink is drawn from the sub-tank into the recording head. The ultrasonic transducer applies ultrasonic vibration to the ink contained in the sub-tank. The ink outlet port of the second ink passage is arranged near the ultrasonic transducer.

Ink-jet recording apparatus

In a cleaning unit that cleans nozzles are provided a support base, a wiping portion that moves together with the support base to clean an ink on the nozzles, and a suction nozzle that is provided on the support base through a spring behind the wiping portion with respect to a traveling direction along which a cleaning operation is performed and sucks the ink subjected to cleaning. The wiping portion is moved by a set pin to adjust a gap between the wiping portion and a recording head, and contact cleaning or non-contact cleaning is selected at the time of cleaning. As a result, there can be provided an inkjet recording apparatus that can prevent an ink-repellant coating from being abraded, stably eject the ink, and record a high-quality image.

Inkjet recording apparatus

An ink set for an image recording apparatus, includes a first ink, and a second ink which has the same color base as that of the first ink but is different from the first ink in density. A coloring material having a color base different from that of the first ink is mixed in the second ink in such a manner that a hue thereof approximates a hue of the first ink.

Ink set for image recording apparatus

An ink head includes an ink head module and a nozzle plate. The ink head module has a plurality of ink chambers in which ink is retained. The nozzle plate is attached to the ink head module. The nozzle plate has at least one nozzle to jet ink inside the ink chamber. The surface of the nozzle plate opposing to a recording medium has a first region coming in contact with an opening of the nozzle and a second region other than the first region. Water repellency of the first region is higher than that of the second region.

Ink jet head having oval-shaped orifices

An ink jet printer includes ink jet heads for recording an image on a recording medium, an ink bottle for holding ink, an ink supply path connecting the ink bottle to each ink jet head, and an electromagnetic valve provided on the path. In the printer, the bottle, the valve and the heads are arranged downward in this order in the vertical direction, the path constantly exists upwards in the vertical direction in such a manner that air entered into the path moves up above the valve due to a difference in the specific gravity between the air and the ink, the path is provided with a branching portion provided between the valve and the heads, and a sub ink tank is provided at an end of the branching portion so as to be positioned lower than the heads in the vertical direction.

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Hachioji, Japan

Kaoru Horie