Abstract: A method and apparatus for printing electrographically upon two sides of a chemically pre-treated recording medium, at comparatively high speed such as is required in a computer print-out apparatus.A pre-treated paper medium comprised of a conductively treated paper base supporting a plastic dielectric coating on each of its sides, is positioned between electrode assemblies comprised of matrices of a plurality of styli which receive variable information from a data processor, or other equipment and by selectively changing the plurality of styli generating a latent image of alphanumeric characters or other variable printing by electrostatic discharge on the paper which is retained by the coating. The latent image is developed, i.e., made visible, by subjecting the paper medium to charged toning particles suspended in a liquid toning carrier. The image is then fixed, i.e., made permanent by vaporizing the liquid carrier with heat.

Abstract: A real-time laser recording film having a plastic/dye coating on one side thereof provides improved image sharpness and visual qualities. The film fabrication is compatible with continuous production techniques to provide an economical, high quality film.

Abstract: A method for article coding using transparent indicia formed essentially of aluminum monohydrate. An article may be marked with a serial number or the like with a liquid material consisting essentially of aluminum monohydrate. When dried, the marking will be transparent. The marking will have a higher affinity for indicator solutions than will the substrate, and will therefore become visible when the article is sprayed or coated with such a solution. The article may be glass, metal, paper, wood or plastic. If the substrate material permits, heating to 300.degree. C. after coating with the indicator solution will destroy the indicator and render the marking or indicia transparent again.

Abstract: A migration layer comprising migration material and softenable material, said migration layer having a set electrical latent image. The process of setting the electrical latent image comprises providing an imaging member comprising the above migration layer, electrically latently imaging the migration layer and setting the electrical latent image by either storing the migration layer in the dark or applying heat, applying vapor, or applying partial solvents in a pre-development softening step. After setting of the electrical latent image, the migration layer can be exposed to activating electromagnetic radiation without loss of the latent image and permitted long delays of up to years between formation of the electrical latent image and the development step which allow selective migration in depth.

Abstract: An imaging member comprising an agglomerable layer on a substrate is agglomerated in image configuration to cause the formation of larger agglomerates in the agglomerated areas which usually produces a relative transparentizing or a color change in the agglomerated areas. This imaging process is followed by contacting the imaged member, usually uniformly, with a solvent for the agglomerable material or a chemical reactant for the agglomerable material to dissolve away agglomerable material in the unagglomerated (which herein includes relatively unagglomerated compared to the agglomerated areas) areas or chemically react with agglomerable material in the unagglomerated areas, respectively at a faster rate than in the agglomerated areas.

Abstract: A heat-sensitive recording material which contains as color former at least one azo compound of the formula ##STR1## WHEREIN D represents a phenyl radical which is unsubstituted or substituted by halogen, alkyl, alkoxy, aryloxy, alkoxycarbonyl, N,N-dialkylaminocarbonyl, acylamino, N-acyl-N-alkylamino or the group ##STR2## wherein each of Y.sub.1 and Y.sub.2 independently represents alkyl or aryl or, together with the nitrogen atom to which they are attached, represent a heterocyclic ring which optionally contains an oxygen atom,X.sub.1 represents hydrogen or alkyl,X.sub.2 represents alkyl, cyanoalkyl or arylmethyl, or X.sub.1 and X.sub.2, together with the nitrogen atom to which they are attached, represent a heterocyclic ring which optionally contains an oxygen atom,X.sub.3 represents alkyl or aryl, and n is 1 or 2; said color former being dispersed or dissolved in a fusible binder layer on a substrate, and the material also containing an electron acceptor substance as a color developer.

Abstract: Solvents useful to dissolve dyes employed in pressure-sensitive copying systems comprise compositions of monobenzylated, dibenzylated and, optionally, tribenzylated xylenes having defined isomeric configurations. Benzylated meta-xylene; benzylated para-xylene; and benzylated meta-para-xylene are low-odor solvents.

Abstract: A desensitizing composition used for a recording material capable of forming a color image by the reaction of a colorless color former and an adsorbent, which contains at least one compound obtained by the addition reaction of an .alpha.,.beta.-unsaturated carboxylic acid derivative or an .alpha.,.beta.-unsaturated ketone with an amine, is disclosed. A method of desensitizing an adsorbent contained in a recording material which comprises using such composition is also disclosed.

Abstract: A migration layer comprising migration material and softenable material, said migration layer having a set electrical latent image. The process of setting the electrical latent image comprises providing an imaging member comprising the above migration layer, electrically latently imaging the migration layer and setting the electrical latent image by either storing the migration layer in the dark or applying heat, applying vapor, or applying partial solvents in a pre-development softening step. After setting of the electrical latent image, the migration layer can be exposed to activating electromagnetic radiation without loss of the latent image and permitted long delays of up to years between formation of the electrical latent image and the development step which allow selective migration in depth.

Abstract: An electrophotographic process of forming a dye image comprising the steps of:(1) charging a photosensitive element formed on an electroconductive support by electrical charging, said photosensitive element consisting essentially of photoconductive particles and sublimable dyes, (2) exposing the charged photosensitive element to a light image, (3) developing the photosensitive element with acidic toners, (4) heating the photosensitive element to sublime the sublimable dyes, and (5) transferring the dye images to a dye-image accepting substrate with the aid of solvents.An electrophotographic material comprising an electroconductive support and a photosensitive element (i.e., photoconductive layer) formed thereon, said photosensitive element consisting essentially of photoconductive powders and sublimable dyes.

Abstract: A sensitized record sheet material is disclosed, suitable for developing color in oily, colorless, chromogenic dye-precursor inks applied thereto. Said record sheet material has a light, reactive, coating which comprises a zinc compound and a salicylic acid derivative combinded in, and applied from, an aqueous system of basic pH. The coating composition is also disclosed, as is the process for making it.

Abstract: New vinyl compounds of the general formula ##STR1## are provided, wherein A is --CO-- or --SO.sub.2 --, v is 0 or 1, w is 0 or an integer of 1 to 6, x is 0 or 1, y is 2 to 6 and z is 1 or 2, at least one of w and x x being a positive integer. The vinyl compounds are useful as cross-linking agents for hydrophylic colloids, especially for gelatine in gelatino silver halide emulsion layers and other layers in photographic material.

Abstract: Heat-sensitive recording materials having a recording layer comprising a soluble heat-sensitive organic high molecular weight compound which is folded to show a granular state on a support, and a recording process for obtaining images which comprises imagewise applying heat to the recording layer to insolubilize the high molecular weight compound and removing by dissolving the portion of the recording layer where the high molecular weight compound is not insolubilized.

Abstract: An acid donor sheet for use in thermographic imaging which comprises a substrate sheet material having a coating comprising an organic acid which is volatilizable at thermographic imaging temperatures, an additive consisting essentially of a fatty acid having from 10 to 26 carbon atoms or a metal salt thereof, and a polymeric binder compatible with said volatilizable acid. A preferred composition is salicylic acid, lauric acid and nitrocellulose on a polyester base. The acid donor sheet of the invention is particularly useful in providing color projection transparencies having improved image density, readability, and permanence.

Abstract: Articles in the form of multilayered cards which contain information invisibly printed between a support member and a top member. By rubbing the exposed surface of either the support member or the top member, the information is developed into visible information which can be viewed either through one of the members, i.e., when one of the members is composed of a transparent material, or by physical separation of the members. The multilayered cards are structured similarly to multilayered carbonless copy papers. The information is protected from premature, unauthorized development and detection due to the fact that development thereof creates a chemical change in the multilayered card which cannot be reversed.

Abstract: A method for printing braille characters by means of a lithographic printing process in which photosensitive sheet material is exposed to form a dot image of one or more braille characters on the sheet material. The sheet material is then developed and subsequently photographed and a negative made of the developed sheet material. The negative is stripped onto a goldenrod sheet and the stripped negative is exposed on a light-sensitive lithographic plate which is subsequently developed. The dot image developed on the lithographic plate is then offset printed on sheet material stock and the printed sheet stock is passed through a thermography machine to form raised braille characters on the sheet stock.

Abstract: An image producing system is provided which comprises paper impregnated or coated with a dispersion of a color former in a mixture of water and a water-miscible organic solvent for the color former; and a carrier material impregnated with a solution of an organic acid in a weakly volatile high boiling solvent.

Abstract: A process for preparing identification cards which comprises spreading bonding material on a substrate, placing a transparent film over the coated substrate, superposing a photograph having opaque and transparent portions, directing light rays to harden portions of the bonding material which correspond to the transparent parts of the photograph, spreading particulate material over the bonding material, removing the particulate material that has not adhered to the bonding material, and sealing a transparent covering. An identification card comprising a thermoplastic coated magnetic backing means, large number of individual particles arranged to constitute a photographic image bonded to the thermoplastic coated backing means, and a transparent covering overlying the backing and heat sealed thereto. Also provided is a unitary laminated identification card that has a three-dimensional effect which cannot be readily photographically counterfeited and is substantially tamper-proof.

Abstract: Solvents useful to dissolve dyes employed in pressure-sensitive copying systems comprise aryl esters of benzoic or substituted benzoic acid having the structure: ##STR1## wherein R.sub.1 is hydrogen, methyl or ethyl; R.sub.2 is hydrogen or C.sub.1 to C.sub.9 alkyl; R.sub.3 is hydrogen, methyl or ethyl; and n is zero or 1.

Abstract: Rheologically stable aqueous dispersions of metal-modified novolak resin particles are prepared by grinding an aqueous mixture of the metal-modified novolak resin and anionic polymeric dispersing agent in the presence of a small amount of an organo-phosphorus compound containing two or more phosphonic acid or alkali metal phosphonate groups per molecule. Dispersions of the metal-modified resin particles so produced may be incorporated in color developing coating compositions containing a binder which may be applied and dried on a carrier paper to produce a pressure-sensitive record sheet.

Abstract: A migration imaging system wherein migration imaging members typically comprising a substrate, a layer of softenable material, and migration marking material, additionally comprises an overlayer of electrically conductive material which is electrically connected to electrically charge the imaging member.

Abstract: An imaging system using a migration imaging member comprising a softenable photoconductive material with a fracturable layer of migration marking material contacting the softenable photoconductive material and having the fracturable layer spaced apart from at least one surface of the softenable layer and typically contiguous to the free surface of the softenable material. Imaging with a member comprising a softenable photoconductive binder material with marking particles therein dispersed throughout said softenable binder is also disclosed. Imaging is accomplished by providing a migration force across the migration imaging member and developing the member whereby the migration marking material migrates in depth in the softenable layer in imagewise configuration.

Abstract: A procedure is disclosed for the production of paintings on glass, the subjects of the paintings being, for example, original paintings, engravings, lithographs and like articles whose appeal is primarily aesthetic. A low-contrast image of the subject is first produced using a photographic film, preferably a fine-grain medium contrast panchromatic film, the image is projected on to a photographic glass plate which is preferably coated with a slow, blue-sensitive high contrast orthochromatic emulsion having very fine grain and very high resolution, a clear varnish is applied to the emulsion side of the glass plate and the image is colored by application of paint to the varnish coating.

Abstract: The appearance of a heat-stable polymer coating is enhanced by a process which produces a decorative pattern within a heat-stable polymer coating. The process consists essentially of applying, in a decorative pattern, an oxidation catalyst composition which diffuses into the heat-stable polymer coating composition and renders the pattern visible, upon baking, within the baked coat produced by the coating composition.

Abstract: A set of carbonless recording sheets wherein each of the individual sheets of the set may be separately stacked with sheets which are identical thereto without the danger of offsetting or inadvertent reproduction occurring through that stack. The sheets become operative only when assembled into the manifolded set. The central, intermediate sheets of the manifolded set are each coated front and back with respective chemicals which are incapable of reacting with one another to produce a color. The set includes at least two different types of intermediate sheets, one of which has a front coating capable of reacting with the back coating of the other to produce a color and vice versa.

Abstract: The photochromic activity of triphenylmethane paraamino leuco salts is reversibly inactivated in compositions containing the leuco salt with certain metallic oxides or sulfides. The photochromic properties of the leuco salts are restored by the application of energy, e.g. heat, mechanical pressure, etc. The sensitive compositions containing the leuco salt and metal oxide or sulfide are useful in a process for recording information according to a predetermined pattern by applying a local heat source or local pressure source to a recording material containing a layer of the sensitive composition, the application of energy resulting in the formation of colored marks corresponding to the information to be recorded.

Abstract: The appearance of a heat-stable polymer coating is enhanced by a process which produces a decorative pattern within a coating produced by a heat-stable polymer coating composition. The process consists of applying a heat-stable polymer composition as a subsequent coat over or directly under an antioxidant composition and an oxidation catalyst composition which are both arranged in decorative patterns and which diffuse into the heat-stable polymer coating composition and render the patterns visible, upon baking, within the baked coat produced by the coating composition.

Abstract: The appearance of a heat-stable polymer coating is enhanced by a process which produces a decorative pattern within a coating produced by a heat-stable polymer coating composition. The process consists of applying a heat-stable polymer composition as a subsequent coat over or directly under an antioxidant composition which diffuses into the heat-stable polymer coating composition and renders the pattern visible, upon baking, within the baked coat produced by the coating composition.

Abstract: Method for producing a thermoplastic resin film or sheet useful for chelate color printing which involves contacting at least one surface of a thermoplastic resin film or sheet with a mixed liquid composition comrising (i) a liquid capable of dissolving or swelling said thermoplastic resin, (ii) a liquid having no ability to dissolve or swell said thermoplastic resin, being compatible with said liquid (i) and having a faster rate of evaporation than said liquid (i), and (iii) an inorganic compound containing at least one metal atom selected from the group consisting of iron, vanadium, titanium, molybdenum and tungsten, or an organic compound capable of forming a chelate compound with the metal atom and developing a color, and evaporating off said liquids (i) and (ii), thereby to form a porous surface layer of the film or sheet to which is adhered an uppermost chelate color printing layer comprising said inorganic or organic compound (iii).

Abstract: Rheologically stable aqueous dispersions of metal-modified novolak resin particles are prepared by grinding an aqueous mixture of the metal-modified novolak resin and anionic polymeric dispersing agent in the presence of a small amount of an organo-phosphorus compound containing two or more phosphonic acid or alkali metal phosphonate groups per molecule. Dispersions of the metal-modified resin particles so produced may be incorporated in color developing coating compositions containing a binder which may be applied and dried on a carrier paper to produce a pressure-sensitive record sheet.

Abstract: Thermosensitive recording material for use in thermal printing, which is composed of a coating composition applied on a support, which coating composition comprises (a) a chromogenic compound, (b) an organic acid, (c) a water-soluble binder containing a carboxyl group and having a softening point of 200.degree. C or higher, (d) a filler, (e) a metal salt of a higher fatty acid and (f) a wax, said recording material having a Bekk surface smoothness of 100 to 500 seconds.

Abstract: A coloring composition for line- or pattern-drawing elements which comprises as a base material thereof one or more acidic sublimating substances such as benzoic acid, salicylic acid and phthalic acid. Lines and/or patterns drawn with the coloring composition are easily erased by heating.

Abstract: Metal-modified para-substituted phenol-aldehyde novolak resins suitable for use in pressure sensitive manifolding systems are produced by melting and mixing together a para-substituted phenol-aldehyde resin and a metal alkanoate salt in the presence of an ammonium compound.

Abstract: Disclosed is a novel paper sheet adapted for the electrostatographic reproduction of images on both sides thereof. The paper bears a surface sizing material having dispersed therein a plurality of microcapsules comprising water or a hydrated salt encased in an impervious capsule wall of a solid material. As the paper is subjected to the electrostatographic fusing operation, water is released from the microcapsules to replenish that lost due to the heat of fusing. In this manner, the paper can be imaged on its other side without encountering the problems associated with dehydration of the paper.

Abstract: Migration material dispersed throughout a softenable layer is caused to imagewise selectively migrate to at least locations in depth in the softenable layer, by (A) subjecting said migration material to an imagewise migration force and changing the resistance of said softenable layer, to migration of migration material or by (B) subjecting said migration material to a migration force and imagewise changing the resistance of said softenable layer to migration of migration material.

Abstract: Thermographic recording material or image-receiving material for dry copying processes comprising at least one layer and a substantially non-photosensitive reducible silver salt, a reducing agent, and optionally a toning agent or toning mixture, wherein the reducing agent corresponds to the following general formula: ##STR1## wherein: EACH OF R.sup.1, R.sup.3 and R.sup.5 (equal or different) represents hydrogen, a straight-chain or branched alkyl group comprising 1 to 9 carbon atoms, or a cycloalkyl group, with the proviso that R.sup.1 and R.sup.5 do not represent hydrogen simultaneously,R.sup.2 represents a straight-chain or branched alkyl group comprising 1 to 4 carbon atoms, or a cycloalkyl group,R.sup.4 represents hydrogen, or a straight-chain or branched alkyl group comprising 1 to 4 carbon atoms, or a cycloalkyl group,And wherein each of R.sup.1 and R.sup.2 together, R.sup.2 and R.sup.3 together or R.sup.4 and R.sup.

Abstract: A desensitizer composition containing at least one of an amidine represented by the general formula (I) ##STR1## wherein R.sub.1 and R.sub.2 each represent an alkyl group having 1 to 8 carbon atoms, R.sub.1 and R.sub.2 can form a C.sub.2 to C.sub.11 ring which can be substituted by alkyl groups having 1 to 4 carbon atoms, and n represents 2 to 6, or a derivative of the amidine.

Abstract: A thermographic recording process in which a dye is produced by bringing image-wise into reactive contact with the aid of heat an organic acid-reacting compound with a dye precursor compound corresponding to the following general formula:X = Ar - CH = N - R.sub.1wherein:Ar represents a bivalent aromatic nucleus,R.sub.1 represents an aryl group andX represents a ##STR1## group wherein each of R.sub.2 and R.sub.3 (same or different) represents an alkyl group, a cycloalkyl group, an aralkyl group, or an aryl group or R.sub.2 and R.sub.3 together represent the necessary atoms to close a nitrogen-containing heterocyclic nucleus.

Abstract: A method of image reproduction is disclosed wherein an image is reproduced by selectively activating a surface of an image transfer body to form a tackified image configuration on the surface and contacting the surface with a transfer developer material which adheres to the tacky surface in image configuration. The developer material comprises a sublimable dye. The transfer body surface is positioned adjacent a surface of a receiving body and the adhering developer material is heated to a temperature for causing the dye to sublimate and thereby transfer in image configuration to the adjacent surface of the receiver body. The transfer and receiver bodies are separated and a reproduction of the image is retained on the receiver body. A number of copies are produced by repeatedly replacing the receiver body and reheating the adhering material. A reproduction master for use with this method is also disclosed.

Abstract: A migration imaging system including imaging members comprising a substrate overcoated with a softenable layer, and migration marking material, with the softenable layer having a thin surface skin of material having a higher viscosity than the remainder of the softenable material layer.

Abstract: Record material comprising paper sheet material coated with liquid-containing microcapsules wherein the liquid contents comprise ethyldiphenylmethane. Said liquid is associated on the record material with at least two color-producing reactants, at least one of which is soluble in said liquid. The encapsulated liquid is associated with the reactants by either being in close proximity to both reactants or by having one of the reactants dissolved therein and being in close proximity to the other. Of the color-producing reactants, one is a chromogenic dye-precursor and one is a coreactant material capable of developing the color of the chromogenic dye-precursor when the two reactants are brought into reaction contact by rupture of the capsule walls that contain said liquid.

Abstract: A recording process, wherein an organic reducing compound being present in a supported or self-supporting layer and corresponding to one of the following general formulae (I) and (II): ##EQU1## wherein: R.sub.1 represents hydrogen, an aliphatic group of a cycloaliphatic group, andR.sub.2 represents an aliphatic oxy group, a cycloaliphatic oxy group, an aryloxy group, an amino group of the formula ##EQU2## in which R.sub.3 and R.sub.4 (same or different) represent hydrogen, an aliphatic, a cycloaliphatic or an aromatic group or R.sub.3 and R.sub.4 represent together the necessary atoms to close a heterocyclic nitrogen containing nucleus; ##EQU3## wherein: R.sub.5 represents an aliphatic, cycloaliphatic, aromatic or heterocyclic group, is caused to effect in said layer under the influence of information-wise heating an information-wise reduction of a reducible reaction partner.

Abstract: A channeled photosensitive element and a process and apparatus for laminating the same are described. In particular, a substantially solid, photoresist-forming layer having grooves or channels therein is applied with pressure to a surface having raised areas, such as a printed circuit board without entrapping air bubbles.

Abstract: In a heat sensitive recording material comprising a support having a heat sensitive layer or layers thereon which comprise colorless or palely colored chromogenic substance and phenolic substance capable, upon heating, of causing color formation of said chromogenic substance, at least one organic amine derivatives are contained as a decolorizing agent in said heat sensitive layer or another layer adjacent to said heat sensitive layer. Using this recording material, two colors which are clearly distinguishable can be obtained.

Abstract: A method for modifying vesicular images into non-scattering images is provided, which comprises opening the closed bubbles of the vesicular image to form an open-bore image by allowing at least one organic solvent which attacks the thermoplastic bubble walls of the vesicular image to act on the latter, optionally making the image wettable with a surfactant introducing the image substance into the open pores by treatment with a solution or dispersion of the image substance and, optionally removing any remaining gas bubbles or pores by heat or solvent treatment.

Abstract: Thermal sensitive indigo compounds are disclosed.A thermal sensitive sheet material is disclosed utilizing dehydroindigo di(alkyl acylates) as a color producing component. The material can be a copy medium and it can be transparent or non-transparent.The indigo compounds are substantially colorless dehydroindigo di(alkyl acylates) colorable by thermal exposure.

Abstract: Material from a layer of migration material spaced apart from at least one surface of, but contacting a softenable layer is caused to imagewise selectively migrate to at least locations in depth in the softenable layer, by (A) subjecting said migration material to an imagewise migration force and changing the resistance of said softenable layer, to migration of migration material or by (B) subjecting said migration material to a migration force and imagewise changing the resistance of said softenable layer to migration of migration material.

Abstract: A migration imaging system wherein migration imaging members typically comprising a substrate, a layer of softenable material, and migration marking material, additionally comprises an overlayer of electrically conductive material which is electrically connected to electrically charge the imaging member.

Abstract: A recording sheet comprising a support having a developer layer thereon, the developer layer containing a phenol resin and an aqueous emulsion of an oily material and produced by admixing a coating composition containing a phenol resin and an aqueous emulsion of an oily material and coating the resulting mixture on a support.

Abstract: A recording paper having a color-developing layer containing a component capable of being colored or discolored by application of heat which has been made electroconductive by incorporation of an electro-conductive substance. When an electric current is applied to the color-developing layer, the recording paper selectively gives a visible record at a portion of the color-developing layer to which the electric current has been applied.