Hitachi, Ltd.

Akira Mori

Junichi Matsuno

Shogo Matsumoto

Keiji Kamio

Mitsuo Suzuki

Taisaku Seino

Yasushi Kinoshita

Akira Sasaki

Toshio Ogiso

Kazutaka Sato

Tetsuro Akasaki

Shigetaka Furukawa

Yukio Yamamoto

Kazumi Takahashi

An image forming device and method utilizing an electrostatic latent image recording medium, developing units reserving different colors for developing images on the recording medium, a dryer for drying the developed images, and an adhesion reinforcer for enhancing adhesion of toner particles including electrostatically pressing dried toner particles against a front surface of the electrostatic latent image recording medium.

Method and apparatus for forming color image

Provided a color recording device for developing a color image with the use of liquid developer in which toner is dispersed, in which liquid developer having a high toner density is preferably used for printing a fine image, which however causes a problem of precipitation of toner or the like. Thus, at least four liquid type color developing units using liquid developer having a high toner density of 5 to 35% are arranged on a rotary base which is rotated so that the developing units are changed over so as to be respectively opposed to a recording medium, and each of the developing units is composed of a cartridge bottle in which the liquid developer is pooled, a supply passage for supplying the liquid developer pumped up from the cartridge bottle onto a pump-up roller for feeding the liquid developer pumped up onto a developing roller. The supply passage can supply a regulated quantity of the liquid developer in association with the rotation of the rotary base.

Recording apparatus with rotatable liquid developer units enabling agitation of liquid developer

Provided is a liquid development apparatus which can restrain carrier liquid in a liquid developer from being evaporated and diffused into the atmosphere, which has a simple and convenient arrangement, and in which a recording medium formed thereon with an electrostatic latent image in accordance with image data is transferred and the electrostatic latent image on the recording medium is developed by a developer in a liquid developer in which toner particles are dispersed. The liquid development apparatus includes a developer supply for feeding the developer containing non-volatile components having a density of 10 to 30 wt. %, a developer holding member having a surface roughness in a range from 8 to 25 .mu.m Rz, for holding the developer fed from the developer supply, and a conductive member facing the developer holding member, interposing the latent image bearing recording medium on which the electrostatic latent image is formed, between itself and the developer holding member, for applying an electric filed between itself and the developer holding member in a direction in which the toner particles are shifted from the developer holding member toward the latent image bearing recording medium.

Liquid development apparatus

An ion flow recording apparatus performs recording making density modulation every pixel. When developing on a fine grain toner is to be performed using a liquid developer for an electrostatic latent image, a developing unit (developing roller) is disposed to face a direction of gravity. Namely, a control valve is provided on a pipe for application of a developer to the developing roller or on a joint portion between the pipe and a developer tank, developing units of different two colors are joined to their developer tank portions, and a rotary shaft is provided on the joint portion to be positioned at a point of symmetry to provide alternate use of the two developing units upon turning them. Therefore, developing for a plurality of colors can be simply performed, and such turning of the developing units enables prevention of the toner from deposition in the liquid developer during developing, thereby making it possible to perform a clear recording.

Ion flow recording apparatus and liquid developing method

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Tsuchiura, Japan

Akira Mori