Mita Industrial Co., Ltd.

Yoshiko Uriu

Eiichi Tone

Takeshi Watanabe

Kenichi Satake

Kikunosuke Tsuji

Setsuo Hori

Yuki Ito

Masayuki Ishii

Seiji Kado

Kohichi Baba

Hiromi Nakatsu

Koji Umeno

An ink jet printing apparatus includes a sheet transporting mechanism for transporting a printing sheet along a vertical plane; a first printing head unit provided on a horizontal plane perpendicularly intersecting the vertical plane and having an ink emission portion for emitting ink to one side surface of the printing sheet; and a second printing head unit provided on a horizontal plane perpendicularly intersecting the vertical plane and having an ink emission portion for emitting ink to the other side surface of the printing sheet.

Ink jet printing apparatus capable of simultaneously printing an image

An ink ejecting device includes an ink ejecting member having an ink chamber and a nozzle at a specified position thereof; an ink ejecting driver for reducing the volume of the ink chamber to eject out ink from the ink chamber through the nozzle; and a controller connectable to an image data generator generating image data indicative of a plurality of densities for controlling the ink ejecting driver to regulate the volume reduction of the ink ejecting chamber in accordance with image data. Ink is ejected at an amount corresponding to image data indicative of a density. An image having a gradation can be printed at a high speed accurately and clearly with a simplified construction.

Ink jet printing apparatus which utilizes different voltages applied to

An ink ejecting device for use in an ink jet printing apparatus, includes: a number of ejecting elements arranged in a matrix having a first number of columns and a second number of rows, each ejecting element having: an ink chamber whose volume is changeable, an ejection nozzle communicating with the ink chamber, and an ink supply hole communicating with the ink chamber, and an piezoelectric conversion element, a drive portion for driving piezoelectric conversion elements of each column in a manner for expanding the ink chamber to allow ink to flow into the ink chamber and contracting the ink chamber to eject ink from the ink chamber through the ejection nozzle.

Ink ejecting device for use in an ink jet printing apparatus

An image reading device includes a photoelectric conversion array of a number of photoelectric conversion elements arranged in a first direction; and a scanner which scans photoelectric conversion elements in the first direction, the scanner having: a first scanning mode of scanning respective photoelectric conversion elements of two or more primary regions defined in the photoelectric conversion array in parallel; and a second scanning mode of scanning respective photoelectric conversion elements of two or more secondary regions defined in a particular primary region in parallel, and a switch which switches over the first and second scanning modes.

Image reading device

A sheet transporting device for use in an image forming apparatus includes a first and second sheet transporting members movable in widthwise directions of sheet to be transported, the first sheet transporting member for transporting the sheet in a lengthwise direction of the sheet in contact with one side end portion of the sheet, the second sheet transporting member for transporting the sheet in the lengthwise direction in contact with the other side end portion of the sheet; a moving mechanism for moving the first and second sheet transporting members in widthwise directions of the sheet: a sheet feeder provided at an upstream of the first and second sheet transporting members for holding the sheet temporarily and feeding the sheet to the first and second sheet transporting members; and a controller for controlling the moving mechanism and the sheet feeder to move the first and second sheet transporting members until they come into contact with the sheet while rendering the sheet feeder hold the sheet.

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Osaka, Japan

Yoshiko Uriu