Ricoh Company, Ltd.

Kabushiki Kaisha Ricoh

Takao Igawa

Fumihito Masubuchi

Yukio Konagaya

Tohru Nogiwa

Akihide Itoh

Hiroyoshi Taniguchi

Yoshihiko Hotta

Kunichika Morohoshi

Makoto Kawaguchi

Tsutomu Kagawa

Nobuo Yamada

Haruo Hasegawa

Akihide Ito

Akira Suzuki

Atsushi Kutami

Tetsuya Amano

Shoji Maruyama

Toru Nogiwa

Tomio Kubota

Mitsuru Maeda

Shiro Yamane

Tomoshi Nagayama

Susumu Nemoto

Akihiko Goto

Taeko Maeda

Katsuyoshi Kodama

A reversible thermosensitive recording medium having a support, a reversible thermosensitive recording layer formed thereon which contains a matrix resin and an organic low-molecular-weight material dispersed in the matrix resin, capable of reversibly assuming a transparent state and a white opaque state depending on the temperature thereof, and a magnetic recording layer formed on the reversible thermosensitive recording layer, and optionally, an anchor layer, which is provided on the reversible thermosensitive recording layer. The magnetic recording layer is integrally provided in a part of the reversible thermosensitive recording layer or the anchor layer by a step of fusion-bonding, applying, or transferring.

Reversible thermosensitive recording medium and method of producing the

Method of producing reversible thermosensitive recording medium

A reversible thermosensitive recording label for reversibly forming images and erasing recorded images thereon is composed of a reversible thermosensitive recording member having a temperature-dependent transparency which reversibly changes depending upon the temperature thereof, an adhesive layer provided on the back side of the reversible thermosensitive recording member, and a disposable release sheet applied to the adhesive layer. A reversible thermosensitive recording card is composed of the reversible thermosensitive recording member, the adhesive layer provided on the back side of the reversible thermosensitive recording member, and a label receiving material to which the adhesive layer is applied.

Reversible thermosensitive recording label and reversible

A method of compensating for the distortion in a recording layer of a reversible thermosensitive recording medium, for which transparency of the recording layer is changeable, depending upon the temperature thereof, and the recording layer is capable of forming images and erasing the images reversibly. The distortion in the recording layer is caused by the repeated image formation by image formation means and/or image erasure by image erasing means. In this method, stress is applied to the recording layer before and/or after image formation by the movement of the recording medium relative to the image formation means, in a direction different from the direction of the application of stress in the course of a previous image formation or image erasure. Instead of the stress, thermal energy can be employed for compensating for the distortion in the recording layer.

Method of compensating for distortion in recording layer in reversible

A reversible thermosensitive recording material is composed of a support and a reversible thermosensitive recording layer formed thereon, which is capable of recording and erasing images repeatedly by utilizing its property that the transparency can be changed reversibly from a transparent state to an opaque state, and vice versa, depending upon the temperature thereof. The reversible thermosensitive recording layer is composed of a reversible thermosensitive layer and a protective layer formed thereon and has a scratching intensity of 10 g or more and a coefficient of friction of 0.10 or less. Images are reversibly formed and erased on this reversible thermosensitive recording material.

Reversible thermosensitive recording material and image display method

An electrostatic recording medium is disclosed, which comprises a substrate, an electroconductive layer, and a recording layer which are successively overlaid on the substrate, with the surface of the recording layer being studded with at least one component selected from the group consisting of a polymeric electrolyte, an inorganic salt and a surface active agent.

Electrostatic recording medium

The present invention provides a photosensitive material for use in electrophotography which is superior in durability, resistance to solvents and light sensitivity, which comprises a photoconductive layer consisting essentially of an inorganic or organic photoconductor and an ionizing radiation-curable resin as formed on a conductive support, said photoconductive layer having been cured by applying said radiation.

Photosensitive material for use in electrophotography with a radiation

A lithographic printing plate which comprises using in an ink-repellent layer a polymer of a monomer or a copolymer containing said monomer, said monomer being represented by the following general formulas: ##STR1## WHEREIN: R is hydrogen or a methyl radical; R' is hydrogen or an alkyl radical having 1 to 10 carbon atoms; Rf is a perfluoroalkyl radical having 3 to 21 carbon atoms; and n is an integer of 1 to 10.

Lithographic printing plate

Photoconductive, film forming nitropyrene-formaldehyde resins characterized by a repeating structural unit of the formula: ##SPC1## And process for preparation, the photoconductive films themselves, and such films on an electrically conductive support.

Process for manufacturing nitropyrene-formaldehyde resin

A photosensitive material comprising a conductive support provided with a photoconductive layer and a protective layer, wherein the protective layer contains an organic aluminum compound.

Electro photosensitive materials with a protective layer

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Numazu, Japan

Takao Igawa