Abstract: A plurality of recording electrodes are disposed in parallel form on an elastic metallic thin plate through an insulating layer, a protrusion made of a conductive material is formed in the proximity of the tip of each of recording electrodes, and notched grooves are formed between the recording electrodes to partition the recording electrodes.

Abstract: Disclosed is a method for regenerating an ink recording medium formed by successively laminating an anisotropic electrically conductive layer, a heating resistor layer for generating heat in response to application of an electric signal, an electrically conductive layer, an ink parting layer, and a heat-melting ink layer, in which the heat-melting ink layer after print-recording with the ink recording medium is regenerated by use of ink particles containing a binding resin and a coloring agent, the improvement is in that by use of the ink recording medium further including an ink parting layer having a thickness of 0.08 to 3 .mu.m, and a volume resistivity of 10.sup.8 .OMEGA. cm or more, the heat-melting ink layer after print-recording with the ink recording medium is electrified with the same polarity as the potential of electrified ink particles, and then the ink particles carried by an ink carrier is deposited on traces of transferred ink formed in the heat-melting ink layer.

Abstract: A print storage medium comprises a heat-generating layer for generating heat with an electrical signal input in accordance with a picture, the signal being supplied from a printing signal applying electrode to which the heat-generating layer is in pressure contact, an electrically conductive layer, an ink layer provided on the heat generated layer. The print storage medium is further provided with a plurality of microscopic electrodes on the storage medium with which the printing signal-applying electrode is in pressure contact, each of the microscopic electrodes being isolated from others. The electrically conductive layer may be formed of striped electrodes. The isolated microscopic patterns may be formed of electrically conductive ceramics or of electrically conductive resin.

Abstract: A printing head comprising a thin resin board, printing electrodes positioned in parallel with each other mounted thereon, projections of an electroconductive substance on the electrodes, and slits cut in the head between the projections, extending from the front edge of the resin board to a point midway between the front and rear edges of the resin board. An electrically insulating layer may be deposited on the surface of the head, leaving the projections clear. The thin elastic resin board can deform easily to comply to deformations and irregularities in the printing medium surface. The slits allow removal of foreign matter, such as dust. The slits further allow the electrode projections to contact the printing medium singly or in small groups, across the length of the printing head, rather than all at once, so that the presence of foreign matter on one electrode will not prevent any other electrode projection from making contact.

Abstract: A current-conducting thermosensitive recording media used for non-impact recording which attains better energy efficiency and higher printing speeds through a thermosensitive recording ink medium comprising: a stratified ink support in which electrical conductivity in the direction of the thickness is greater than the electrical conductivity in the direction of the surface; a thermogenetic resistor layer for producing heat; a return electrode layer; a thermally melting ink layer; and an ink separating layer. The thermogenetic resistor layer, the electrode layer, the ink separating layer, and the thermally melting ink layer are laminated on the ink support in that order.

Abstract: A recording head of the present invention comprises an electrically insulating substrate having an elastic layer on a substrate, a plurality of recording electrodes arranged in a side-by-side relationship on the elastic layer, and a groove provided between the adjacent recording electrodes at least in the area near the front end of the electrode.

Abstract: A method and an ink for use in thermal electrostatic ink-jet recording wherein the ink has appropriate physical properties, i.e. density, viscosity and surface tension in relation to the gap to which the electric field is applied and the density of air to make it possible to readily set conditions in the recording head which are appropriate for jetting the ink.

Abstract: Thermal electrostatic ink-jet recording wherein improved stability and speed of operation are achieved by use of an ink having a viscosity ratio satisfying the relative .mu.R/.mu.H>10, where .mu.R represents the viscosity of the ink at 20.degree. C. and .mu.H represents the viscosity of the ink at a temperature between 70.degree. C. and 200.degree. C.

Abstract: An ink-jet recording head wherein thermal energy and an electroelastic field are applied to ink held between two plate members to cause the ink to be jetted out from an orifice defined by the plate members wherein there is provided, on the orifice-side end portion of each of the plate members adjacent the orifice, a first area readily wettable by the ink and a second area away from the orifice which is less wettable by the ink.

Abstract: A thermal electrostatic ink-jet recording apparatus includes an orifice for storing and jetting ink. The orifice is formed between first and second plate members and a longitudinal array of heating elements is formed on one of the plate members and is covered by an insulating layer. An electrically conductive layer is formed either on the insulating layer or the other plate member and cooperates with a counter electrode supporting a recording medium to apply an electrostatic field to ink in the orifice. The electrically conductive layer includes a central portion that extends substantially to the egress of the orifice in the area where ink is contained in the orifice and peripheral portions on either side of the orifice that are not in contact with the ink and that are spaced substantially away from the egress of the orifice. The spacing of the peripheral portion away from the egress of the orifice prevents a gas discharge phenomenon that induces instability in ink jetting.

Abstract: A recording medium for ink-jet printing comprising a support material containing at least in the surface portion thereof a water-soluble metal salt with the ion valence of the metal thereof being 2 to 4 and a cationic organic material.

Abstract: Disclosed is a thermal electrostatic ink-jet recording apparatus comprising a head body provided with an ink chamber, electrodes for selectively applying heat, in response to image signals to each of discrete ink unit areas corresponding to pel density, and electrodes for producing a predetermined electrostatic field between an ink surface and a recording sheet so as to jet the heated ink unit areas by applying the electrostatic field, in which electric current is passed through an organic resistance film to heat the ink.

Abstract: A recording material for ink jet printing for forming images thereon with an ink composition by ink jet printing is disclosed, which comprises a base material and a surface recording layer formed thereon, the surface recording layer contains at least a surface active agent which does not form a material insoluble in the ink composition in combination with a dye contained in the ink composition.

Abstract: An aqueous ink for ink-jet printing comprising at least a water-soluble dye, a water-soluble organic solvent, a water-soluble preservative and anti-mold agent, and water, wherein(1) the water-soluble dye is a mixture of dye compounds I and II and/or III, the peak ratio of I/II and/or III of the water-soluble dye measured by liquid chromatography is in the range of 0.9 to 3.0; the total concentration of NaCl and Na.sub.2 SO.sub.4 contained in the water-soluble dye is 3.0 wt.

Abstract: An aqueous ink is disclosed, which comprises a first magenta dye having the formula (I), a second magenta dye having the formula (II), a water-soluble organic solvent having a boiling point of 100.degree. C. or higher, water and a preservative and anti-mold agent: ##STR1## wherein R.sup.1 and R.sup.2 each represent ##STR2## (in which R.sup.5, R.sup.6, R.sup.7 and R.sup.8 each represent a lower alkyl group, an amino group, a sulfonic acid group in the form of an alkali metal salt, or a carboxyl group in the form of an alkali metal salt); R.sup.3 and R.sup.4 each represent a lower alkyl group, an amino group, a sulfonic acid group in the form of an alkali metal salt, or a carboxyl group in the form of an alkali metal salt; and k, l, m and n each represent an integer of 0, 1 or 2.

Abstract: A recording apparatus includes an image bearing or forming drum which is driven to rotate in a predetermined direction at constant speed. As the drum rotates, an image is formed on its peripheral surface electrostatically or electrophotographically. The image, developed or undeveloped, on the drum is then transferred to a transfer medium with the stiffness of the transfer medium being adjusted prior to the transfer. The drum has a diameter which is small enough for the transfer medium to be separated away from the drum by its own stiffness after image transfer, thereby allowing to dispose of an extra separating device and to make the whole apparatus compact in size and simple in structure.

Abstract: A recording method by use of an ink is disclosed, in which images are formed by an aqueous ink comprising at least one dye selected from the group consisting of a pyrazolone azo dye, a phthalocyanine sulfonate dye, a xanthene dye and an azo dye on a recording medium containing at least one component selected from the group consisting of a water-soluble metal salt whose metal has an ion valence of 2 or more, an alkyl amine and a quaternary ammonium salt.

Abstract: A process for regenerating an ink sheet which comprises disposing an electrodepositing electrode in contact with a base layer of a used ink sheet comprised of a base layer and an ink layer superimposed on one side of said base layer, said ink layer having hollowed parts therein; disposing an opposed electrode at a fixed interval on the side of said ink layer; supplying a powder ink onto the surface of the opposed electrode while impressing a fixed voltage between these electrodepositing electrode and opposed electrode, said powder ink being formed of the same or substantially same components as those of said ink layer; transferring said powder ink from the surface of said opposed electrode to the hollowed parts of the ink layer for adhering thereto; and thereafter fixing.

Abstract: The present invention provides an electrophotographic element which comprises a charge generating layer and a charge transport layer formed, in order, on an electroconductive substrate, said charge generating layer comprising a disazo pigment expressed by the general formula: ##STR1## [wherein A represents ##STR2## represents a member selected from the group consisting of benzene ring, naphthalene ring, indole ring, carbazole ring, benzofuran ring and their substitutes; Ar.sub.1 represents a member selected from the group consisting of benzene ring, naphthalene ring, dibenzofuran ring, carbazole ring and their substitutes; each of Ar.sub.2 and Ar.sub.3 represents a member selected from the group consisting of benzene ring, naphthalene ring and their substitutes; each of R.sub.1 and R.sub.3 represents a member selected from the group consisting of hydrogen, lower alkyl radical, phenyl radical and their substitutes; and R.sub.

Abstract: An aqueous ink is disclosed, which comprises a first magenta dye having the formula (I), a second magenta dye having the formula (II), a water-soluble organic solvent having a boiling point of 100.degree. C. or higher, water and a preservative and anti-mold agent: ##STR1## wherein K.and R.sup.2 each represent ##STR2## (in which R.sup.5, R.sup.6, R.sup.7 and R.sup.8 each represent a lower alkyl group, an amino group, a sulfonic acid group in the form of an alkali metal salt, or a carboxyl group in the form of an alkali metal salt); R.sup.3 and R.sup.4 each represent a lower alkyl group, an amino group, a sulfonic acid group in the form of an alkali metal salt, or a carboxyl group in the form of an alkali metal salt; and k, l, m and n each represent an integer of 0, 1 or 2.