Abstract: A minaturized self limiting corona generator for charging a receiver surface includes a plurality of corona emitting wires housed in respective biased conductive shields with the wires being spaced farther from the receiver surface than the wire-to-shield spacing in order to provide self limiting of surface potential on the receiver surface.

Abstract: A fluid jet assisted electrographic marking apparatus for ion projection printing wherein ions are generated in a chamber, entrained in a rapidly moving fluid stream passing into, through and out of the chamber, modulated in an electroded exit zone by being selectively emitted or inhibited therein, and finally deposited in an imagewise pattern on a relatively movable charge receptor.

Abstract: In the development of xerographic images wherein the latent image is in the form of a periodic charge pattern, polar or polarizable toner particles are employed. It is desirable to utilize a development system that will bring the polar or polarizable toner into contact with the periodic charge pattern without triboelectrically charging the particles. To achieve this aim, an apparatus and method are described for moving the polar or polarizable toner particles through a development zone at substantially the same speed and in the same direction as that of the imaging member.

Abstract: In the development of nonuniform latent images on an imaging member, wherein xerographic polar or polarizable toner particles are employed, it is desirable to utilize a development system that will bring the polar or polarizable toner into contact with the latent image without triboelectrically charging the particles and without requiring magnetic particles when the image is electrostatic and without demagnetizing the image when it is magnetic. To achieve this aim, a dielectric brush having convergent electrostatic fields is disclosed and claimed.

Abstract: A process for preparing electrostatographic toner particles having controlled particle size and size distribution is provided by forming a blend of a molten mass of polymer and a colorant, cooling and solidifying the blend in the form of a film or fiber thereof. The film or fiber is then passed through embossed or cutting rollers to enable fracture of the film or fiber into discrete particles having a size of between 1 micron and about 30 microns.

Abstract: An electrostatic imaging system in which a conductive pattern and triboelectric charging are utilized on opposite sides of an electrically insulating member to form a developable electrostatic latent image. Electrostatically charged marking particles are deposited in conformance to the latent image and thereafter transferred to a receiving sheet. Charging, development and transfer are effected without the aid of light or any externally applied voltage.

Abstract: A deformation imaging system including an imaging member comprising a layer of a surface deformable material, a layer of an elastomer material, and means for establishing an imagewise electrical field across at least the surface deformable material layer and/or the elastomer layer. Embodiments wherein the surface deformable material layer and the elastomer layer are adjacent each other and embodiments wherein these layers are separated from each other are described. Various techniques for subjecting the imaging members to an electrical field and imaging methods utilizing the imaging members are also disclosed.

Abstract: A deformation imaging system including an imaging member comprising a layer of a surface deformable material, a layer of an elastomer material, and means for establishing an imagewise electrical field across at least the surface deformable material layer and/or the elastomer layer. Embodiments wherein the surface deformable material layer and the elastomer layer are adjacent each other and embodiments wherein these layers are separated from each other are described. Various techniques for subjecting the imaging members to an electrical field and imaging methods utilizing the imaging members are also disclosed.

Abstract: A color image reproduction system wherein there are recorded in superimposition on an imaging member a plurality of images respectively corresponding to the color content of different colors of an original image. Each recorded image is in the form of a surface deformation phase grating which is at a different angular orientation from the phase grating(s) of the other image(s). In operation, the imaging member is sequentially exposed to an original image through spatial light modulating means with illumination of appropriate color at least two times, in each instance employing illumination of a different color and positioning the spatial light modulating means at a different angular orientation. In a preferred embodiment three exposures of the imaging member are made using red, blue, and green light and there is provided a full color reproduction of a full color original image.

Abstract: Deflection and modulation of monochromatic light is achieved by providing an about 1 micron to about 6 micron thick layer of homogeneously aligned nematic liquid crystalline material having negative dielectric anisotropy between two transparent electrodes; applying a voltage between the two electrodes at a voltage level above the threshold voltage level for parallel variable diffraction mode for said nematic liquid crystalline material; directing a ribbon or beam of monochromatic light into the layer of nematic liquid crystalline material and coplanar therewith; and increasing and decreasing the applied voltage so that light diffracted by the parallel variable grating mode nematic is deflected at an angle which either exceeds or is less than a critical angle .theta..sub.c. When the deflection of diffracted light is increased in excess of critical angle .theta..sub.

Abstract: A method for reversing the sense of an input image which employs an electro-optic image recorder and novel imaging technique. An unscreened electro-optic image recorder is sequentially exposed to a grating pattern and then to a reading image. The grating exposure produces large surface deformations on the recorder and the bright areas of the imagewise exposure reduce and/or remove the deformations.

Abstract: A color image reproduction system wherein there are recorded at different angular orientations on an imaging member at least two images respectively corresponding to the color content of at least two different colors of an original image. Readout illumination provided by an extended light source is converted to a plurality of point sources, directed upon the imaging member and the information-modulated illumination passed through appropriate light filters to provide a reproduction of the original image at an output image plane.

Abstract: A color image reproduction system wherein there are recorded at different angular orientations on a deformation imaging member at least two images corresponding respectively to the color content of at least two different colors of an original multicolor image. Readout illumination provided by an extended light source is converted to a plurality of point sources and deflected to the imaged member by a member comprising a transparent substrate carrying a plurality of mirrored areas. The information- modulated illumination is then reflected to provide a reproduction of the original image at an output image plane.