Fixing device includes a first cylindrical rotating member having an inner peripheral surface and an outer peripheral surface; a second rotating member which is brought into contact with the first rotating member; magnetic field generation units for generating a magnetic field, the magnetic field generation units being provided at a predetermined distance from the inner or outer peripheral surface of the first rotating member; and a heat generation member that generates heat by a magnetic field, the heat generation member being provided so as to be opposed to the magnetic field generation units across the first rotating member and to be in contact with the first rotating member, having a thickness larger than a skin depth, and containing a magnetic metal material.

Fixing device, and image forming apparatus

An ink recording apparatus used with printers or the like and manufactured by applying semiconductor device manufacturing techniques. One wall of an ink chamber (20) is formed of a single-crystal substrate (21) and an ink jet port (21a) is formed by etching on the single-crystal sub­strate (21). A shutter (25) and electrodes (24a to 24h) composed of polycrystalline-silicon film are formed on the single-crystal substrate by film forming in the LPCVD method and patterning through plasma etching. A front wall (28) is formed by coating the shutter (25) and electrodes (24a to 24h) further with a polycrystalline-silicon film. The shutter (25) is movable between the wall surface of the ink chamber (20) and the front wall (28), being driven through electrostatic attracting force produced between voltage-ap­plied electrodes (24a to 24h) and the shutter (25). The electrodes (24a to 24h) are formed at positions correspond­ing to those where the shutter (25) blocks the ink jet port (21a) and releases the same.

Ink recording apparatus

A thermal transfer recording medium comprising a substrate and a hot-melt ink layer, provided on one surface of the substrate, and a back-coated layer, provided on the other surface of the substrate, said hot-melt ink layer comprising a polyether resin having a basic bisphenol structure and hydroxyl groups at the terminal ends thereof as a binder, and a colorant, said back-coated layer comprising a reaction product of a polyisocyanate and an amino-modified silicone oil, is disclosed. The thermal transfer recording medium of the present invention is capable of forming a transferred image of high quality substantially without being affected by the surface properties of the image receiving paper, and has a high stability.

Thermal transfer recording medium

Disclosed is a thermal transfer image receiving sheet comprising a substrate sheet, an intermediate layer provided on at least one surface side of the substrate sheet and a dye receptor layer provided on the surface of the intermediate layer, wherein the substrate sheet is a pulp paper, the intermediate layer is formed from an organic solvent solution of a resin, and the dye receptor layer is formed from an aqueous resin liquid. By virtue of this structure, the thermal transfer image receiving sheet can be prevented from occurrence of curling caused by temperature change. Also disclosed is a thermal transfer image receiving sheet comprising a substrate sheet, an intermediate layer provided on at least one surface side of the substrate sheet and a dye receptor layer provided on the surface of the intermediate layer, wherein the intermediate layer is formed from either an acrylic resin or a resin at least a part of which is crosslinked. By virtue of this structure, the thermal transfer image receiving sheet can be excellent in smoothness, strength, cushioning properties and writing properties, and further can give an image of high density and high resolution.

Thermal transfer image-receiving sheet

An aqueous ink composition contains at least one pigment selected from the group consisting of a condensed azo pigment, a condensed polycyclic pigment, a phthalocyanine pigment, and a nickel complex azo pigment, at least an anionic surfactant with ethylene oxide group or a nonionic surfactant with ethylene oxide group as a dispersant, a wetting agent, a penetrating agent, and water, with the ink composition having a surface tension of 20 mN/m or more and less than 35 mN/m. A yellow ink containing at least one pigment selected from the group consisting of C.I. Pigment Yellow 128, C.I. Pigment Yellow 138, C.I. Pigment Yellow 151, C.I. Pigment Yellow 97, and C.I. Pigment Yellow 150, a magenta ink containing at least one pigment of C.I. Pigment Red 122 or C.I. Pigment Violet 19, a cyan ink containing at least one pigment of C.I. Pigment Blue 15:3 or C.I. Pigment Blue 15:4, each color ink further containing a specific anionic surfactant and a water-soluble organic solvent, and a black ink containing C.I. Pigment Black 7 are used together as a set of color ink compositions for ink-jet recording.

Aqueous ink composition

PURPOSE: To obtain a water-based ink, containing a specific water-soluble dye, capable of giving clear images having excellent light and water resistance without precipitating during preservation and clogging nozzles and useful for ink jet recording, printing, writing utensils, recorders, etc. CONSTITUTION: A composition containing at least one water-soluble dye expressed by formula I [R 1 is OH or (substituted) amino; R 2 is H, OH or (substituted) amino; M is H, alkali metal, quaternary ammonium or basic amine; Ar is (substituted) aryl; m is 0 or 1; n is 1 or 2]. The content of the dye is preferably 1.5W6.0pts.wt. based on 100pts.wt. ink. COPYRIGHT: (C)1988,JPO&Japio

Water-based ink composition

PURPOSE:To keep the dye in an ink close to the surface of a recording medium, thereby giving a high-density image, by supplying an ink having a specified surface tension to that area of a recording medium where a colorless acidic liquid has been applied. CONSTITUTION:An ink containing a dye, having a surface tension of about 50 dyne/cm or less is applied to that area of a recording medium where a colorless acidic liquid has been applied, thus forming an image. At least one of tartaric acid, acetic acid, lactic acid, succinic acid, and citric acid is preferably used as the pH adjustor for the acidic liquid. As a dye, C.I. direct dye or C.I. acid dye can be used. At least one penetrant selected from the following group is preferably incorporated into the ink to give a surface tension of about 50 dyne/cm or less; diethylene glycol monobutyl ether, propylene glycol monobutyl ether, diethylene glycol monophenyl ether, and a fluorocarbon surface active agent.

Method of ink jet recording

PURPOSE: To stabilize running properties without generating delamination or the lowering of sensitivity by providing a gradient to the content of the substance having lubricity or releasability in a dye transfer contributing layer in the longitudinal direction thereof so that the content of the substance having lubricity or releasability in the dye transfer contributing layer becomes much in the free surface part thereof. CONSTITUTION: A gradient is provided in the content of the substance having lubricity or releasability in a dye transfer contributing layer in the longitudinal direction thereof so that the content of the substance having lubricity or releasability in the dye transfer contributing layer becomes much in the free surface part thereof as compared with the part adjacent to a dye supply layer. The thickness of the transfer contributing layer is pref. 0.1 - 2μm and the thickness of the dye supply layer is pref. 0.5 - 8μm. As an embodiment of the substance having lubricity or releasability, there are a petroleum type lubricant such as liquid paraffin, a silicone type lubricating substance, a salt of higher fatty acid or the like. The content of said substance in the dye transfer contributing layer is pref. 0 - 10wt.% in the part adjacent to the dye supply layer and 1 - 30wt.% in the free surface part. The gradient of the content of the lubricant in the dye transfer contributing layer in the longitudinal direction thereof may be linear or stepwise. COPYRIGHT: (C)1991,JPO&Japio

Sublimation type thermal transfer material

PURPOSE:To obtain the title composition which can give a magenta water-base ink causing no plugging and excellent in injectability and forming an image having excellent sharpness, water resistance and light resistance, by using a specified water-soluble dye as an essential component CONSTITUTION:A water-soluble dye (A) of formula III [wherein R1-2 are each H, a lower alkyl or a lower alkoxy, halogen, Z1-2 are each a group of any of formulas IV-VI, R3-4 are each R1, R5-6 are each OH, an alkoxy, (di) alkylamino, (di)hydroxyalkylamino, cyclic amino, arylamino, or halogen and M is a sulfo group or its salt is obtained, for example, by diazotizing 1,4-bis(4- aminobenzyl)piperazine (a) of formula I and coupling the product with 2mol, per mol of the product, of a coupler (b) of formula II in alkaline conditions brought about by sodium carbonate A mixture of 05-20ptswt, preferably, 15-6ptswt component A with water and, optionally, a water-soluble organic solvent (B) is mixed with, optionally, another red dye, an antiseptic, a pH controller, a chelating agent, etc (C) to obtain 100ptswt title composition

Water-base ink composition

PURPOSE: To provide the title compsn. which has excellent ink dissolution stability and ejection stability, gives an image having excellent water resistance, etc. and is suitable for use as an ink for ink jet printers, containing a dye composed of a specified copper phthalocyanine tetracarboxylic acid derivative. CONSTITUTION: A dye of formula I (wherein CuPc is copper phthalocyanine; Y is a group of formula II or III; R 1 , R 2 , R 3 and R 4 are each an alkyl, a hydroxyl-substd.alkyl or a hydroxyl-substd.ethoxyethyl) is incorporated as an essential ingredient to obtain the desired water ink compsn. The dye of formula I can be obtd. by producing copper phthalocyanine tetracarboxylic acid by a conventional method and then adding an aq. sol. of a hydroxide of a quaternary ammonium or phosphonium having an ionic group represented by Y. Examples of the Y group are ions of formulas IV, V and VI. COPYRIGHT: (C)1988,JPO&Japio

Hiroyuki Kamimura

Papers

Water-based ink composition

Method of ink jet recording

Sublimation type thermal transfer material

Water-base ink composition

Water-color ink composition