Abstract: An optical system in which successive color filtered light images pass through a screen positioned at discrete preselected angles. An un-filtered light image is transmitted through the screen with the screen being positioned at one of the preselected angles for the filtered light image.

Abstract: An optical flying spot scanner having a lens array positioned between a scan line and a detector array and inclined at an angle to the axis of the scan line. Each of the lenses of the lens array has a coordinate position in a plane parallel to the scan line related to a particular segment of the scan line such that the information content of each segment of the scan line is transmitted to a different one of the tiered detectors of the detector array.

Abstract: An imaging member comprising a first layer of electrically active charge transport material contained on a supporting substrate, a photoconductive layer overlying said active layer, and a second layer of electrically active charge transport material overlying said photoconductive layer, said photoconductive layer exhibiting the capability of photogeneration of charge carriers and injection of said charge carriers, one of said electrically active layers which comprises an electrically inactive resinous material made electrically active by the addition of certain activating compounds thereto exhibits the capability of facile hole injection and transport and the other electrically active layer exhibits the capability of facile electron injection and transport.

Abstract: A method and device for improving xerographic development of non-metallic photoreceptor imaging surfaces containing irregularities of 5 microns or larger by contacting and moving a smoothing and abrading means against the irregular surface in the presence of an interposed hydrodynamic hydrostatic fluid bearing.

Abstract: An electronic circuit for controlling a process monitoring arrangement wherein electronic gates respond jointly to oscillator produced pulse trains and an abnormal condition indication signal to either alternately cycle a pair of switching transistors in response to normal process conditions or to hold the switching transistors constant in response to abnormal process conditions.

Abstract: An apparatus in which a photoconductive belt is incremented to advance unused portions thereof to an operative location as used portions advance to an inoperative location. The apparatus advances automatically portions of the photoconductive belt as the belt support member moves a pre-selected interval.

Abstract: An electrophotographic printing machine in which a transparency light image is projected through a screen having a plurality of opaque regions. At least a portion of the opaque regions have a light reflecting surface on one side thereof and a light absorbing surface on the other side thereof. The screen is positioned so that the light reflecting surfaces of the opaque regions form a visual image of the transparency light image being projected therethrough. Incident light rays are absorbed by the absorbing surfaces of the opaque regions.

Abstract: An apparatus in which an electrostatic latent image is developed simultaneously in two colors. A first portion of the latent image has a potential greater than a first threshold with a second portion thereof having a potential less than a second threshold. The second threshold is less than the first threshold. Particles of a first color are applied to the first portion of the latent image with particles of a second color being applied to the second portion of the latent image. The electrostatic latent image is discharged to a potential less than the second potential and portions thereof having a potential greater than the second threshold by a pre-selected level.

Abstract: An electrophotographic printing machine in which color transparencies are reproduced. A projected image of the color transparency is scanned forming a light image thereof. The light image is modulated and filtered creating a single color half-tone light image. A charged photoconductive member is irradiated by the single color half-tone light image recording a single color electrostatic latent image thereon.

Abstract: An electrophotographic printing machine in which a latent image of an original document and a screen pattern are formed on a photoconductive member in superimposed registration with one another. The contrast of the screen pattern is regulated.

Abstract: An optical system in which a screen modulates the light produced thereby. The intensity of the light image is varied as a function of screen position.

Abstract: A half-tone screen in which a first and second set of grooves are inscribed in a transparent member. The grooves are arranged in a repetitive pattern with each groove from the first set being interposed between adjacent grooves of the second set, and the width of each groove of the first set being greater than the width of each groove of the second set.

Abstract: A control device in which the dispensing of particles from a storage container to a mix is regulated. At predetermined sampling intervals, the concentration of particles in the mix is detected and a signal indicative thereof generated. These signals are summed and processed by a program to develop an actuating signal. The actuation signal energizes the storage container to dispense particles into the mix.

Abstract: An electrophotographic printing machine in which color transparencies are reproduced. A projected image of the color transparency is scanned forming a light image thereof. The light image is modulated and filtered creating a single color half-tone light image. A charged photoconductive member is irradiated by the single color half-tone light image recording a single color electrostatic latent image thereon.

Abstract: A novel magenta developer system is provided which employs a 2,9-dimethylquinacridone pigment and a resin toner in combination with a carrier coated with resin containing copper tetra-4-(octadecylsulfonomido) phthalocyanine. Thus, a magenta developer is provided for the first time which is capable of employing a coated conventional carrier, thereby simplifying the color electrophotographic process. Color electrophotographic process employing this developer are also disclosed.

Abstract: An apparatus in which a latent image is developed with particles. A support member advances the particles from a storage chamber to the development zone. In the development zone, the particles are separated from the support member and attracted to the latent image. This develops the latent image with these particles.

Abstract: An apparatus in which a fluid release material is applied to a fuser member. The fuser member is in communication with a backup member and a sheet of support material having particles thereon passing therebetween. A sealing arrangement prevents sidewise leakage of the release material along the longitudinal axis of the fuser member.

Abstract: An electrophotographic printing machine in which color transparencies are reproduced. A projected image of the color transparency is scanned forming a light image thereof. The light image is modulated and filtered creating a single color half-tone light image. A charged photoconductive member is irradiated by the single color half-tone light image recording a single color electrostatic latent image thereon.

Abstract: An apparatus in which a powder pattern is formed on a surface. The apparatus applies particles to at least a portion of the surface as well as removing other extraneous particles therefrom.

Abstract: An electrophotographic printing machine in which color transparencies are reproduced. A projected image of the color transparency is scanned forming a light image thereof. The light image is modulated and filtered creating a single color half-tone light image. A charged photoconductive member is irradiated by the single color half-tone light image recording a single color electrostatic latent image thereon. A light image of a composition frame forming an opaque border extending outwardly from the single color half-tone light image of the transparency is projected onto the charged portion of the photoconductive member in registration with the single color electrostatic latent image recorded thereon to form a combined electrostatic latent image. The combined electrostatic latent image is developed with toner particles complementary in color to the color of the single color light image. The toner powder image is transferred to a sheet of support material and permanently fused thereto.