Hitachi Industrial Equipment Systems Co., Ltd.

Mitsubishi Hitachi Power Systems, Ltd.

Takuya Otowa

Hiroshi Sasaki

Masahiko Ogino

Keiji Suzuki

Kinya Kobayashi

Keisuke Nagai

Takahiro Arima

Kenichi Souma

Hiromichi Takeyama

Shengnan Hua

Tatsunosuke Suzuki

Tamaki Wada

Tomoko Maejima

Atsushi Ohtake

Hiroshi Morita

The purpose of the present invention is to provide an ink for ink-jet printers, the ink being able to be reduced in the content of an electroconductive agent and having low resistance. The ink for ink-jet printers of a charge control type according to the present invention, which is provided in order to overcome the problem, is characterized by comprising a resin, a pigment, an electroconductive agent, and a nonaqueous solvent, the electroconductive agent having a salt structure which generates an anion and a cation in the nonaqueous solvent, the anion having a trifluoromethylsulfonyl group and the cation being a quaternary ammonium cation or having an unsaturated heterocyclic structure.

Ink for ink-jet printer of charge control type

This invention provides an ink for inkjet printers with both properties; i.e., good visibility of printing dots after heating and high dissolution stability. The ink for inkjet printers of the invention comprises a color material, a solvent, and resin, wherein the color material comprises a first metal complex and a second metal complex comprising metal ions selected from among iron ions, manganese ions, copper ions, cobalt ions, and chromium ions and ligands bound thereto, and the ligands comprise diketone structures incorporated in the chemical structures thereof.

Ink for inkjet printers

A makeup fluid is added to an ink liquid of an inkjet printer to reduce the viscosity of the ink liquid, the makeup fluid including a fluorescent color material in a solvent. An inkjet printer apparatus employing a makeup fluid is provided with a makeup fluid tank to which a light-emitting element and a light-receiving element are attached, and detects the presence or absence of the makeup fluid by irradiating ultraviolet light from the light-emitting element, causing visible light to be emitted from the fluorescent color material in the makeup fluid, and detecting the visible light with the light-receiving element.

Makeup fluid and inkjet printer apparatus

The visibility of a printing object using a photo-curable ink is improved. A charge control type ink jet printer includes a nozzle which continuously forms ink droplets, a charging electrode which charges each of the ink droplets, a deflection electrode which deflects the charged ink droplet, and a print head which discharges the deflected ink droplet to print the droplet onto a printed substrate. The print head has a UV light source. The UV light source has a focusing member which focuses UV light onto at least part of a flying path of the ink droplet between the print head and the printed substrate and onto a landed region of the printed substrate, and a light emission source.

Charge control type ink jet printer and printing method

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Tokyo, Japan

Takuya Otowa