Abstract: A method and device for obtaining uniform vapor deposition of one or more inorganic metallic photoconductive materials onto a substrate by importing under vacuum a slow translational movement of one or more heated crucibles and/or of the substrate being coated.

Abstract: In an electrophoretic reproduction process wherein a colored reproduction of an original is obtained by sequentially electrophoretically generating at least two visible monochromatic images, and superimposing said images in registry upon a copy web to form a colored reproduction, an improvement is provided comprising essentially eliminating back migration of marking materials from the copy web to the imaging suspension in the second and subsequent image generating steps by employing, in each instance, marking materials comprising a solvent tackifiable polymer and a colorant and/or a copy web containing a solvent tackifiable polymer, and applying to the copy web at least a partial solvent for said tackifiable polymer in an amount sufficient to render said polymer at least partially tacky before the second and before each subsequent image generating step.

Abstract: Control apparatus for a xerographic type copying machine which enables the service technician to give the machine operator or user, as the operator's experience and training progresses, increased control over, and responsibility for, critical machine operating settings. The control apparatus includes a master lock to prevent unauthorized tampering with the machine settings by anyone except the authorized service technician. Individual locks, accessible only to the service technician, are provided for controls which it is expected that the operator or user, with training and experience, can ultimately handle. To nevertheless restrict and control the degree of operator responsibility and involvement in adjusting machine operating settings, means are provided with each control to enable the amount of adjustment that can be made limited.

Abstract: Liquid developer compositions for development of latent electrostatic images are disclosed. The electrostatic printing inks dry at ambient temperatures by penetration into paper leaving a continuous film having excellent rub resistance on the surface. The non-volatile, low viscosity inks comprise about 3-20% pigment and/or dye, about 5-35% of resinous particles having a size of 5 microns or less and having glass transition temperatures close to or below ambient temperature, said resinous particles being dispersed in the liquid carrier, 0-25% dispersing agent and about 25-90% non-volatile, high boiling organic liquid carrier and/or solvent.

Abstract: An electrically pumped, solid-state laser device having a grating or physical periodic structure in a region, or adjacent a region, of semiconductor material that functions as a light wave guide. The spacing of the perturbations of the periodic structure are selected to be an integer number of half wavelengths of the desired laser wavelength. The electrically pumped, solid-state laser device can be a single heterojunction device or a double heterojunction device. Both devices are formed by a process which provides for formation of the periodic structure prior to formation of the light guiding layer or region. Due to this process a periodic structure having a desired spacing and substantial depth is produced, which structure produces Bragg Scattering which couples and reinforces light traveling through the light guiding layer in both directions in a coherent manner such that reflections are in phase, thus allowing laser operation in the absence of discrete end reflectors.This is a division of application Ser.

Abstract: An improved method for varying the Gamma in a TESI electrostatic imaging system is disclosed which provides for positioning a surface of a photoconductive body and a surface of a dielectric body in virtual contact whereby an air gap exists between a portion of the surfaces. The photoconductive body is imaged by exposure to electromagnetic radiation in image configuration while an electric potential difference is simultaneously established across the photoconductive and dielectric bodies. The resulting field in illuminated areas has a magnitude for causing ionization in the air gap and causing a charge pattern to transfer to the dielectric body. The process Gamma is controlled by employing a pulse imaging technique. Pulse imaging is provided by repeatedly interrupting the potential difference, the exposure or both.

Abstract: A system is provided for the production of an electrostatographic copy of an original comprising:A. means for forming an electrostatic latent image on an electrostatographic surface;B. means for bringing the electrostatic image into developing configuration with a patterned applicator containing polar liquid developer to produce a developed image; andC. means for varying the contact time between said electrostatic image and said liquid developer applicator to thereby change the amount of liquid developer deposited on the surface areas of relatively low potential without significantly affecting the amount of liquid developer deposited in areas of relatively high potential.By variation of the time allowed for development, contrast variations in the developed image can be provided over a range of development speeds without a significant variation in the maximum density of the developed image.

Abstract: A roller device and method for maintaining a uniform surface contact along a line of axial trangency with respect to one or more rigid cooperating surfaces having irregularities, the roller device comprising a rigid solid- or cylindrical-type core loosely circumscribed axially with a flexible sleeve, the space between the core and the sleeve being substantially equidistant and filled with a curable plastic foam material to obtain a uniform contact and nip width when in rotational contact with a cooperating surface.

Abstract: An imaging system comprising an imaging member including a deformable metallic layer arranged between a pair of deformable layers, at least one of which comprises an elastomer material. In operation an electrical field is established across the deformable layers to cause deformation thereof in imagewise configuration. The imaging member may include photoconductive material and may include a pair of electrodes for establishing an electrical field across the deformable layers. In one embodiment the electrodes may comprise an electrical X-Y matrix address system.

Abstract: A keyboard encoding system having a pause built into the repeat key function. A multi-stage counter has a first of its stages coupled to a first bistable switching device and another, higher order stage coupled to a second bistable switching device. When a repeat key is closed, the counter is incremented past the first stage to the higher order stage which renders the second bistable switching device conductive and, due to the interconnection between the switching devices, primes the first bistable switching device. When the counter again increments to the first stage, the first bistable switching device conducts to produce, after the pause provided by the system, a repeat key encoding signal.

Abstract: An ink jet includes a meniscus dampening passage, which carries a pressure front timed to arrive within an effective meniscus dampening vicinity of a droplet outlet orifice at substantially the same instant that a droplet leaves the orifice to dampen substantially the full period of meniscus vibration.DESCRIPTION OF THE INVENTIONWhen an ink droplet is expressed from a droplet outlet orifice, the new meniscus formed in the orifice, after the droplet leaves the same, vibrates until it reaches a stable condition. Since the meniscus must be stabilized in order to express controlled droplets, this period of vibration affects the frequency in which the droplets can be expressed through the orifice. The longer the period of vibration, the lower the frequency or the shorter the period of vibration, the higher the frequency.

Abstract: A sheet feeding apparatus in which a stack of sheet material is moved from a non-feeding to a feeding position for advancing successive uppermost sheets therefrom along a substantially common path.

Abstract: Copying apparatus in which an image of charged particles of imaging material is transferred from one supporting surface to a sheet of support material, while the sheet of support material is held on an apertured vacuum belt and an electrical transfer field is applied thereto, where the vacuum belt comprises electrically relaxable material to prevent print-out of the vacuum apertures on the support material. The coping apparatus includes a multiple registered transfer system for color copying with reciprocating of the supporting vacuum belt.

Abstract: Vinyl polycyclic aromatics, particularly polycyclics having 3 or more nuclei and their polymers utilizable as active matrix material for xerographic purposes are obtained in high yield by initial conversion of the polycyclic reactant to the aldehyde in the presence of a haloalkyl ether as a formulating agent in the presence of a Friedl-Crafts type catalyst. The aldehyde intermediate is then converted to the vinyl monomer by using a Wittig-type reaction and, thereafter, polymerized, as desired, by the use of a cationic mechanism.

Abstract: A sheet distribution apparatus for distributing sheets discharged from a reproducing machine. An improved apparatus sequentially distributes sheets into a plurality of bins comprising sheet receiving shelves arranged in a horizontal array. A guide belt is arranged to receive the discharged sheets and guide them into the respective shelves. The guide belt is coiled upon a take-up reel at one end at its other end a device is provided for sequentially advancing the belt along the entrance openings of the bins to distribute the sheets into the respective bins.

Abstract: A circuit for synchronizing a motor at the receiving end of a communication link with one at the transmitting end thereof, the circuit preventing an indication of synchronization until the receiving end motor reaches its rated speed.

Abstract: Precisely prefabricated glass plates are cemented on a precisely machined aluminum polygon employing ultraviolet sensitive cement. Each glass plate is aligned precisely and then fixed in place by application of U-V radiation which fixes the cement and thereby permanently affixes the glass plate to the aluminum polygon. Methods of employing this scanning system in flying spot scanning applications are also disclosed.

Abstract: A recording medium having a recoding layer, a conductive layer and a base body is disclosed which is provided with a conductive electrode on a portion of the surface of recording layer in such a manner as not to be in direct contact with the conductive layer.

Abstract: A laser structure for generating white laser light when energized by a source of dc voltage. The laser tube structure comprises a gas-filled envelope having a longitudinal axis, an anode electrode forming a portion of the envelope. A hollow cathode is positioned within the envelope and coaxially disposed with respect to the anode electrode portion of the envelope. Members are coaxially aligned with the ends of the envelope such that a structure is provided for confining a gaseous medium therein, a dc voltage applied between the cathode and anode electrode creating a discharge therebetween, the discharge stimulating continuous wave laser emission along the longitudinal axis of the cathode, the laser emission comprising simultaneous multi-line emissions in the form of white light.