Abstract: A photographic element comprising a plurality of layers (e.g., three) of light sensitive emulsions arranged one on top of the other and based on a support, each of the emulsions comprising a coupler, a silver halide compound and a sensitization promoter which is transformed into a sensitizer by thermal, photo- or electro-sensitization. Novel processes of color photography and spectral sensitization of color photography emulsions are also disclosed. Furthermore, cameras having means to activate the sensitization promoters in the emulsions are provided.

Abstract: This invention provides an image-forming and image-transferring sheet comprising a base layer having a first surface and a second surface. The base layer is impregnated with a first image-forming reactant whereas each of the surfaces of the base layer has coated thereon a microporous membrane layer having a gradient in elasticity across the thickness thereof. The more elastic surface of the membrane is in contact with the base layer. The other surface of the membrane is coated with a second image-forming reactant. Upon impact by an image instrument such as a typewriter key, the membrane becomes extended to allow diffusion of the first reactant through the membrane to react with the second image-forming reactant on the surface of an adjacent sheet to form an image on the surface of the adjacent sheet. A method of preparing an image-forming and image-transferring sheet is also provided.

Abstract: A scanner for reading bar codes on labels uses a non-coherent light source 11 below a top window 7 to illuminate a code label passing over the window. A lens system focuses an image of the code label onto a photosensitive diode array 25 and onto a photodetector 37. Signal information from the diode array 25 is provided to a code reading circuit 41 when bars on the code label are aligned substantially perpendicular to the array 25. When the bars are not aligned substantially perpendicular to the array 25, the photodetector 37 provides the code reading circuit 41 with pulse signals, transmitted when successive bars on the label pass into focus over the photodetector 37.The system avoids the use of coherent (laser) light and is suitable for reading UPC labels on packages being passed over the window 7.

Abstract: A color photographic element having special chromatic effects is disclosed, the element comprising a support and three emulsion layers. Special chromatic effects are obtained by particular combinations of the sensitizers and couplers contained in the emulsion layers, the combinations being different from conventional.

Abstract: A photochemical color-printing process for textile articles wherein a photosensitive triazene and azo dye coupling agent are applied to surface of textile article, the coated textile is exposed to light with a negative image, unreacted chemical products are removed by washing and rinsing the coated textile article after imaging, and then the coated textile article is dried.

Abstract: An electrosensitive recording material has in a single electrosensitive layer a semiconductor oxide which may be doped or otherwise treated to have crystal surface defects, an antimony or bismuth salt and a complexing agent for modifying the electronic configuration of the salt, all components being uniformally dispersed in a binder. The sensitive layer is carried on an electrically conductive backing which is capable of generating positive charges. Permanent recordings of electrically relayed information signals are formed on the electrosensitive coating by injecting electrons from a writing electrode or stylus into the electrosensitive layer. The electrons create color centers at electron trapping centers formed when the bismuth and antimony salt complex combines with the surface defects of the semiconductor oxide.Electrosensitive coating compositions, recording materials, recording method and apparatus are described.

Abstract: A method of photographic trichromatic printing comprises the steps ofA. applying to the substrate a photosensitive emulsion comprising(a) a binder;(b) three types of grains of semiconductor oxides dispersed in the binder, each adapted to desorb OH.sup.- ions under the action of a primary color radiation; and either(c) a diazo system comprising a diazonium salt and three couplers each being adsorbed onto, or dispersed in the immediate vicinity of, one of said three types of grain; or(d) a diazo system comprising a coupler and three diazonium salts each being adsorbed onto, or dispersed in the immediate vicinity of, one of said three types of grain;B. exposure,C. development by heating; andD. decomposition of unreacted diazonium salts by exposure to UV light, to fix the image.An emulsion so produced and substrates carrying such an emulsion are also produced.

Abstract: The invention relates to electrographic recording.It relates to an electrographic recording process characterized by forming at least one permanent trace or mark by local injection of electrons by means of at least one marking electrode brought to negative potential in an electrosensitive layer containing grains of a color center-generating substance dispersed in an appropriate binder, said electrosensitive layer being supported by a layer which is a good conductor of electricity brought to a positive potential and containing a substance which is able to supply to the electrosensitive layer the same number of positive charges as electrons injected by the marking electrode.The invention can be used in various recording implements.

Abstract: A textile product formed of at least one thermoplastic yarn is texturized by subjecting the yarn simultaneously to a mechanical traction force and a high frequency electrical field applied at local points on the yarn. In order to increase the efficiency of texturizing, the yarn is moistened before it is subjected to the electrical field.