Fujitsu Corporation

Fujitsu Isotec Limited

Yasuo Numata

Yuji Yoshida

Kazuki Ogawa

Masao Hiyane

Toshio Fukushima

Kazuaki Kurihara

Keiji Watanabe

Nobuo Kamehara

Motoyuki Nishizawa

Akio Yano

Masahiro Ono

Akihiko Miyaki

The present invention relates to an ink jet printer in which drops of ink are jetted out onto a surface of a recording medium so as to record an image. The present invention is to obtain an economical ink jet printer in which a reaction force generated in the reciprocal motion of the ink jet head is simply canceled, and the ink jet printer is small and light, and less vibration is caused in the printer, and further it is possible to drive the printer with a small amount of drive energy. The ink jet printer includes: a recording medium conveyance device for conveying a recording medium in the subsidiary direction; a plurality of ink jet heads in which a plurality of nozzles for jetting drops of ink to a surface of the recording medium are disposed, the ink jet heads being capable of moving in the primary scanning direction substantially perpendicular to the subsidiary scanning direction, the ink jet heads being arranged in the printer main body being aligned in the subsidiary scanning direction; and a head reciprocation drive device for reciprocating the ink jet heads in the primary scanning direction at phases different from each other.

Ink jet printer in which reaction force is canceled

The present invention relates to an ink jet printer in which drops of ink are jetted out onto a surface of a recording medium so as to record an image. The present invention is to obtain an economical ink jet printer in which a reaction force generated in the reciprocal motion of the ink jet head is simply canceled, and the ink jet printer is small and light, and less vibration is caused in the printer, and further it is possible to drive the printer with a small amount of drive energy. The ink jet printer comprises includes: a recording medium conveyance device for conveying a recording medium in the subsidiary direction; a plurality of ink jet heads in which a plurality of nozzles for jetting drops of ink to a surface of the recording medium are disposed, the ink jet heads being capable of moving in the primary scanning direction substantially perpendicular to the subsidiary scanning direction, the ink jet heads being arranged in the printer main body being aligned in the subsidiary scanning direction; and a head reciprocation drive device for reciprocating the ink jet heads in the primary scanning direction at phases different from each other.

A piezoelectric fluid pump includes a stationary pump base and a plurality of piezoelectric elements arranged in parallel on the stationary pump base, each of the piezoelectric elements having, in a polarizing direction thereof or in a direction perpendicular to the polarizing direction, a first end fixed to the stationary pump base and a free, second end. The free, second ends of respective pairs of adjacent the piezoelectric elements are connected to each other, for respective units of the fluid pump. Between the pair of piezoelectric elements and between the stationary pump base and the connecting means, pressure chambers are defined. There are gaps are between walls of the piezoelectric elements and walls of piezoelectric elements of adjacent units.

Piezoelectric fluid pump

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Kawasaki, Japan

Yasuo Numata