Hitachi Industrial Equipment Systems Co., Ltd.

Takuya Moriai

Nobuhiro Harada

Takashi Kawano

Akira Miyao

Masahiko Sakuraba

Koji Horikawa

Hisashi Umetsu

An ink-jet recording apparatus has a print headincorporating: a nozzle, which vibrates ink at a constant cycle, jets out the ink, and atomizes the ink; an electrification electrode, which electrify an ink particle; and deflection electrodes, which deflect the electrified ink particle in a main scanning direction. The print headcarries out printing by causing the ink particle to fly to a printing workpiece W conveyed by a conveyer. Flying time of the ink particle in a printing distance La between the printing workpiece W and the print headis calculated, timing of an electrification signal supplied to the electrification electrodeis controlled in accordance with the flying time, and a printing position to the printing workpiece W is set. Thus, printing can be carried out at a predetermined position to the printing workpiece W, and printing quality can be enhanced.

Ink-jet recording apparatus

An inkjet recording apparatus includes an ink particle generation unit that makes a pressurized ink injected from a nozzle into particles, a charging unit that electrically charges the ink particle of those subjected to particulation, which corresponds to a dot to be printed, a polarizing unit that polarizes the electrically charged ink particle in a polarizing electric field, a collection unit that allows a gutter to collect the ink particle corresponding to the dot that is not printed, and a character forming unit that forms a character as a dot matrix on a printing object. A phase detection charging signal is applied to the ink particle that is not used for printing when forming the dot matrix character so as to detect an optimum charging timing in a process of forming the dot matrix character.

Inkjet recording apparatus

In an inkjet recording device, nozzles are arranged orthogonally to a deflection direction of deflection electrodes. Ink jetted from each nozzle is charged by a pair of charging electrodes. Charged droplets are deflected by an electric field formed thereby. Voltages applied to each electrode and timings thereof can be independently adjusted.

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Hitachi, Japan

Takuya Moriai