Ricoh Company, Ltd.

Mayumi Miyao

Tsuneo Kurotori

Katsuhiro Echigo

Manabu Mochizuki

Kenji Kojima

Kenzo Ariyama

Ichiro Tsuruoka

Hiroshi Tanabe

Itsuo Ikeda

Minoru Iwamoto

Ichirio Tsuruoka

In a wet-type electrophotographic image formation method using an organic electrophotographic photoconductor constituted of an electroconductive support and a photoconductive layer formed thereon, the steps of (1) forming a latent electrostatic image on the photoconductive layer, and (2) developing the latent electrostatic image to a visible toner image with a developer comprising toner particles and a carrier liquid constituted of or including a silicone oil in which the toner particles are dispersed.

Wet-type electrophotographic image formation method

A wet-type image formation apparatus comprising a latent electrostatic image formation unit capable of forming on a latent-electrostatic-image-bearable photoconductive member a latent electrostatic image corresponding to an original image; and a wet-type development unit capable of developing the latent electrostatic image into a visible toner image with a liquid developer composed of (i) a carrier liquid comprising a petroleum aliphatic hydrocarbon and a silicone oil with a siloxane structure, and (ii) toner particles comprising a coloring agent and a binder resin, which are dispersed in the above-mentioned carrier liquid.

Wet-type image formation apparatus

A liquid developer for developing latent electrostatic images comprises (i) a carrier liquid comprising at least one component selected from the group consisting of a phenylmethyl silicone oil and a cyclic dimethyl polysiloxane, and (ii) toner particles dispersed in said carrier liquid, and images are formed by a wet-type electrophotographic image formation method using the liquid developer and thermally fixed to a transfer sheet.

Liquid developer for latent electrostatic images

An image forming apparatus which uses a liquid developer to produce a visible image from an image carrier is provided with a movable cleaning unit. This movable cleaning unit is moved in and out of contact with the image carrier. A tank stores the liquid developer which is fed to both the developing unit and to the cleaning unit and is provided with a mechanism for feeding the developing unit and the cleaning unit with the liquid developer which is so stored.

Electrophotographic copier with a developing device using a liquid

An image formation apparatus including a latent electrostatic image formation unit for forming on a latent-electrostatic-image-bearable photoconductive member a latent electrostatic image corresponding to an original image; a development unit for developing the latent electrostatic image into a visible toner image with a developer; an image-transfer unit for transferring the visible toner image from the photoconductive member to a transfer sheet; an image-fixing unit for fixing the visible toner image to the transfer sheet, including an image fixing roller, the surface of which is coated with a release agent comprising a silicone oil; a solvent mist generation unit for generating a solvent mist; and an ozone decomposing unit for trapping and decomposing ozone generated in the image formation apparatus by mixing the ozone with the solvent mist.

Apparatus for decomposing ozone by using a solvent mist

A wet-type image formation apparatus comprising (i) a belt-shaped photoconductor prepared by depositing a photoconductive material on the outer surface of a belt-shaped substrate; (ii) a plurality of pulleys which support and drive the belt-shaped photoconductor; (iii) a charging unit; (iv) an exposure unit; (v) a development unit; (vi) an image transfer unit; (vii) a squeeze roller unit, comprising a pair of roller-supporting members and a co-axial roller; (viii) a cleaning means; (ix) a liquid developer removing unit which is provided inside the belt-shaped photoconductor, capable of removing the liquid developer dropping onto the inner surface of the belt-shaped photoconductor and recovering it in a liquid developer reservoir or a development unit.

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Tokyo, Japan

Mayumi Miyao