Ricoh Company, Ltd.

Hiromitsu Mizuno

Shigeo Hatada

Takanori Tsuyuki

Masami Iguchi

A mixing device for preparing an ink including: a mixing vessel including an injection nozzle and a discharge opening, both of which are provided on a bottom surface of the mixing vessel, wherein the injection nozzle faces in substantially a horizontal direction along a side surface of the mixing vessel to swirl the ink along the side surface, and the discharge opening is located on a downstream side from the injection nozzle relative to the swirling direction and at a position between the center of the bottom surface and the side surface; a connector connecting the injection nozzle with the discharge opening; and a pump configured to transport the ink from the discharge opening to the injection nozzle through the connector and inject the ink into the mixing vessel from the injection nozzle while applying a pressure to the ink.

INK MIXING DEVICE, INK MANUFACTURING APPARATUS, METHOD FOR WASHING THE INK MANUFACTURING APPARATUS, METHOD FOR MANUFACTURING INK, INK, INK CARTRIDGE CONTAINING THE INK, IMAGE FORMING METHOD AND APPARATUS USING THE INK, AND PRINT IMAGE PRODUCED BY THE IMAGE FORMING METHOD AND APPARATUS

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Numazu, Japan

Hiromitsu Mizuno