Mitsubishi Paper Mills Limited

Dainippon Screen Mfg. Co., Ltd.

Sadao Kuriu

Shigeyoshi Suzuki

Takao Senga

Jun Yamada

Yasuo Tsubai

Yuji Takagami

Toshihito Maruyama

Akira Kunihiro

Akira Furukawa

Eiji Miyasaka

Jun Urasaki

Tsuyoshi Harada

Tetsuya Ashida

Isao Kohmura

Masahiko Saikawa

Shin Nakagawa

Kyonosuke Yamamoto

Shigehiko Miyamoto

Iwao Hirose

Masaharu Kimura

Yoshikazu Takano

Tomoko Ishimaru

Masahiro Yamasaki

Kunihiro Tanabe

Kenji Hirata

Yasuhiro Kawaguchi

Koji Uchida

Takanori Takei

Masayoshi Otsuka

Koshiro Ikegami

Masato Asano

Fumito Fukuhara

Kunihiro Fukushima

Tokubee Maegawa

Disclosed is a processing device of a photo-sensitive material which comprises a conveying device for conveying a photo-sensitive material, a slot die for applying a processing liquid to the photo-sensitive material conveyed by the conveying device, a reservoir tank of the processing liquid, a supply device of the processing liquid for supplying a processing liquid in the reservoir tank of the processing liquid to the slot die, a support roll of the photo-sensitive material arranged at a position opposite to and spaced from a tip of the slot die, a device for detecting a photo-sensitive material, and a driving device for rotating the support roll of the photo-sensitive material which can rotate the support roll at least in the direction reverse to a conveying direction of the photo-sensitive material.

Processing device of photo-sensitive material

There is disclosed a method of processing a light-sensitive material which comprises exposing a light-sensitive material having at least one light-sensitive layer on a support, and subjecting to development by a dipping system or a coating system, and then, peeling at least the light-sensitive layer off by bringing a peeling material into close contact with the light-sensitive material, wherein the peeling material is a material having a liquid-absorbing rate in which a liquid-absorption amount within 0.1 second after getting in contact with a liquid is 60% or more based on a liquid-absorption amount within 0.2 second after the same.

Method of processing light-sensitive material

There are disclosed a processing apparatus for a photosensitive material having a coating device of a processing liquid to a photosensitive material, which comprises using a slot die having a manifold and a slot at the inside of the die as a coating device, and a processing apparatus for a photosensitive material which comprises a photosensitive material transferring device, a photosensitive material detecting device, a slot die for coating a processing liquid to the photosensitive material and having a manifold and a slot at the inside of the die, and a device for supplying a predetermined amount of the processing liquid to the slot die, wherein a detection result at the detecting device of the photosensitive material is fed back to the supplying device of the processing liquid to control operation of the processing liquid supplying device.

Apparatus for processing photosensitive material

An ink jet recording medium which comprises a support and a layer comprising fine particles of a thermoplastic organic polymer, formed on at least one side of the support, so that said fine particles of a thermoplastic organic polymer are dissolved or melted after ink jet recording to form a layer wherein said fine particles of a thermoplastic organic polymer are fused to one another, wherein said fine particles of a thermoplastic organic polymer have an average particle size within a range of from 1 to 20 &mgr;m.

Ink jet recording medium, apparatus for preparing an ink jet printed product, and ink jet printed product

The apparatus for coating a photosensitive material (M) with a processing liquid comprises an activator coating mechanism (43) for metering a constant amount of activator to apply the metered activator to the photosensitive surface of the photosensitive material fed by the pair of introduction rollers. The activator is supplied form a plurality of discharge holes (121) bored in a pipe (122) and is once received by a receiving portion (124). The activator is diffused horizontally and flows downwardly through a plurality of openings (123) bored at the bottom of the receiving portion onto a coating roller (125). The activator is diffused again at the contact between the coating roller and a diffusion film (126) and is coated to the photosensitive material by the coating roller.

This invention relates to a method for electrophotographic wet reversal development comprising charging an electrophotographic photoreceptor comprising a substrate and a photosensitive layer coated thereon, exposing the electrophotographic photoreceptor to form an electrostatic latent image on the surface of the photosensitive layer, and developing the electrostatic latent image by carrying the electrophotographic photoreceptor through a wet reversal developing device having a developing electrode in substantially a linear form having a projected width of 30 mm or less and applying a bias voltage to said developing electrode. Usually, the bias voltage applied is 80% or more of the surface potential of the photoreceptor and the development is carried out by passing the photoreceptor at a rate of 0.5-20 m/min through the developing device. This method produces images with less edge effect and excellent tone reproduction. The developing electrode is simplified resulting in improved maintainability.

Method of electrophotographic wet reversal development

The present invention provides a method for making an electrophotographic printing plate by reversal development which comprises uniformly charging the surface of an organic photoreceptor comprising an electrically conductive support and, provided thereon, an organic photoconductive compound bound with a resin binder, exposing the surface to a light image to form a static latent image corresponding to the light image on the surface of the organic photoreceptor and then, subjecting the static latent image to reversal development with an electrophotographic liquid developer containing charged toner particles, characterized in that the reversal development is carried out with the electrophotographic liquid developer having an electrodeposition potential set within the range of 0-80 V in absolute value.

Method for making electrophotographic lithographic printing plate by

The invention provides a method for cleaning squeeze rollers of a liquid electrophotographic developing apparatus by a cleaning pad which makes it possible to develop an electrophotographic photoreceptor with causing no stains. The method includes the steps of supplying a solvent for liquid developer to a pair of squeeze rollers thereby to clean the rollers with the solvent; isolating the squeeze rollers from each other; and allowing one of the rollers which contacts with photosensitive surface of photoreceptor and the cleaning pad to contact with each other thereby to clean the roller kept isolated from the other squeeze roller by the cleaning pad. The invention further provides a liquid electrophotographic developing apparatus for carrying out the method.

Method and apparatus for cleaning squeeze rollers in liquid

A liquid developing apparatus for electrophotograph in which an electrostatic latent image surface of a photoconductive material is confronted with developing electrodes and at the same time is transferred in the liquid toner to be developed, the developing apparatus characterized by comprising a developing chamber defined by a bottom plate held substantially in a horizontal position or slanted with a downstream side in the photoconductive material transferring direction being kept at a lower level, developing electrodes facing the bottom plate at predetermined intervals and forming ceiling plates and side plates, the developing chamber being divided into a front section and a rear section with respect to the photoconductive material transferring direction, an interval between the developing electrode in the front section of the developing chamber and the electrostatic latent image surface being smaller than that between the developing electrode in the rear section of the developing chamber and the electrostatic latent image surface, both end faces on the upstream and downstream sides being opened, and at least one supply passage for the liquid toner being provided at the front section of the developing chamber, between the front and rear sections and/or at a portion of the rear section near to the front section.

Liquid developing apparatus for electrophotography

Image recording sheet materials having a relatively hard support, e.g., printing plate sheet materials, can be simply, efficiently, automatically fed to a subsequent step without damaging a photo-sensitive surface by the present feeding method which comprises piling plural units each of which comprises a combination of an image recording sheet material having a relatively hard support and a spacing paper put on said sheet material in such a manner that the leading edge portion of the sheet material protrudes beyond the leading edge of the spacing paper and the trailing edge portion of the spacing paper protrudes beyond the trailing edge of the sheet material and the trailing edge portion of the spacing paper is held so as not to be fed and applying a feeding means to the leading edge portion of said sheet material to feed only the sheet materials to a subsequent step.

Method for feeding recording sheet materials

There is disclosed an electrophotographic lithographic printing plate having a precoat layer having improved water resistance and organic solvent resistance and an improved photoconductive layer which comprises:

Electrophotographic lithographic printing plate

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Tokyo, Japan

Sadao Kuriu