Abstract: A duplicating apparatus is equipped with a photoconductive modulator screen cylinder for making reproductions of a graphic original on a dielectric receiving medium utilizing aperture-controlled electrostatic printing techniques. Means is provided for creating a charge distribution system on the surface of the modulator corresponding to an image to be reproduced from the graphic original. The apparatus also comprises charging means for projecting gas ions against the modulator screen cylinder, electrode means for collecting the gas ions selectively transmitted by the modulator screen cylinder on the dielectric receiving medium and means for developing the dielectric receiving medium to create a visible image.

Abstract: A secure property document is provided which includes an optical data set defined by radiant energy modifying elements underlying a magnetic data member for reflecting infrared radiation therethrough. Preferably, the infrared reflectors are comprised of a plurality of thin metallic elements vapor deposited onto a magnetic tape during manufacture prior to hot stamping.

Abstract: A conversion solution for rendering hydrophilic the zinc oxide resin binder type planographic masters containing 2.0% potassium ferrocyanide, phosphoric acid to produce a pH in the range of 4.1 - 4.2 and a buffering salt of ammonium acid phosphate or sodium acid phosphate to buffer the solution and 4.0% by weight of triethanolamine as a modifying and solvating agent to raise the solubility threshold preventing formation of needle-like crystals that tend to form as water evaporates from the solution, and modify the physical property of crystals that do form to a less-hard structure.

Abstract: An acousto optical diffraction cell, capable of passing polychromatic radiation and useful in a high speed, high intensity character generator. A monoclinic prism behaves like a parallel plate of glass when deenergized, and diffracts light under Bragg angle conditions over a useful spectral range when energized, thus ensuring a high I1/I0 ratio. The cell can be used as a very fast linear scan device, or it can be used as a multiple light beam modulator.

Abstract: A device is provided for reading optical and magnetic data and providing signals representative thereof, said device including means for establishing a predetermined time or spacial reference between the optical and magnetic data sets. In one embodiment the optical and magnetic read heads are mounted in parallel alignment with the path of document travel to reduce timing errors due to skewing. In a second embodiment the heads are mounted side-by-side such that timing errors due to speed variations and thermal expansions are reduced.

Abstract: A method of using photocomposition technology to insure all characters falling on a common text base line when multiple lenses are used to change point size in a line of text. Each lens is tested by deliberately setting the flash circuit to be armed by its dedicated timing mark to flash before the character is properly aligned with the optical system. Then from a memory record produced by a previous test program, the flash is delayed by the count in memory. Therefore, the mechanical positioning of a plurality of lenses in a turret may be only reasonably accurate, and not be responsible for misplacing characters off of the text base line when lenses are intermixed during composition of that base line of text.

Abstract: In a photocomposer, a collimated optical system to enable a decollimator and reflective surface to space characters along a composition line, with a variable size determining primary lens and a negative collimating lens, whereby the optical path is greatly foreshortened.

Abstract: An improved printing apparatus control system regulates the operation of a sheet feed assembly which sequentially moves sheets of material to and from a printing station and a plate feed assembly which sequentially moves printing plates to and from the printing station. A photocell detects initial movement of a leading end portion of the printed sheet of material away from the printing station under the influence of the sheet feed assembly. This photocell is also utilized to detect when the printed sheet of material has completely exited from the printing station. A second photocell detects the presence of the succeeding sheet of material at the printing station. The control system also includes a sensor which detects the removal of one printing plate from the printing station, the absence of a printing plate at the printing station, and the subsequent arrival of the next succeeding printing plate at the printing station.

Abstract: In order to make utmost use of the time and effort of an operator, a duplication system has been devised in which first the duplicator equipment feeds the copy paper along a linear path while producing the copies, the path then turns, and the copy is fed by a direction changing means in a direction substantially normal to the original path into a sheet distributor which has its unloading apertures arranged so as to be convenient to an operator standing at an operator station beside the discharge end of the duplicator device at the operation side thereof. The distributor is of a type such that the unloading openings are exposed to operator access at or slightly above waist level, and is preferably a rotary distributor capable of moving the filled pockets to a fixed unloading position.

Abstract: A data capture terminal is disclosed which is particularly applicable for two-way data communications with a remote facility, such as a central data processor. The terminal employs a memory for storing data entered into the memory from various peripherals, such as an information reader, or a manually operated keyboard, or an input/output peripheral, such as a central data processor. Data entered into the memory from one of these peripherals may be communicated to an output peripheral, such as a visual display or a printing mechanism, or to a remote facility.

Abstract: A moisture system is provided for a lithographic duplicator comprising means for controlling the rate at which moisture is supplied to the master as a function of speed of a hydrophilic roll driven by an ink-receptive roll in contact with the master cylinder. The control means also utilize reference signals, indicative of duplicator speed, to the control moisture supply rate.

Abstract: A method and device for recording data related to usage of a copier machine, or the like, is provided. The device includes means for producing data related to the apparatus usage and means for presenting an image of the data to the exposure plane of the apparatus whereby operation of the machine produces a record of the data on copy material.

Abstract: An optical and magnetic data transducer is provided comprising a magnetic reluctance aperture which is split into two sections with an optical reading aperture disposed generally therebetween. This reduces timing errors between the optical and magnetic output signals indicative of the spacial relation of the optical and magnetic data element boundaries, such errors being due to variations in temperature and skewing.

Abstract: A three-layered modulator, made up by sandwiching a photoconducting layer between a metal screen and an insulating layer, is applied separate and distinct fringing fields across the insulating layer corresponding to the image and non-image portions. The process calls for illuminating and applying a blanket electrostatic D.C. charge; simultaneously illuminating the modulator with a pattern of light and shadow and applying an oppositely poled D.C. charge; bringing the surface to an equi-potential level by applying an A.C. charge through a balanced A.C. corona or constant voltage A.C. scorotron; and in the final step, flood illuminating.

Abstract: A transaction terminal system is provided including means which prevent the utilization of certain tapped-line data. Security data, such as personal identification numbers or card security codes, is allowed to be distorted by each terminal in a manner which varies from terminal to terminal within the system and is corrected for at the data processor or other appropriate location in a manner specified for the particular terminal sending the data.

Abstract: A microfiche viewer is provided with means for selecting one microfiche carrier from a plurality of microfiche carriers contained within a magazine for holding the same, means for positioning such selected microfiche carrier along a first axis, means for positioning an optical-projecting means along another axis perpendicular to the first axis whereby a preselected frame of a microfiche contained within the carrier can be viewed on a screen and means for replacing the microfiche carrier into the magazine.

Abstract: A self-priming pump is provided for metering a positive controlled amount of a volatile liquid to a utilization device. The pump comprises a piston means for pumping the liquid from a liquid supply container to a chamber, and from the chamber to a reservoir where the liquid is maintained at a uniform and constant level by an overflow port which drains any excess liquid back to the liquid supply container. The liquid remaining in the reservoir flows through an outlet passage to a well from which the liquid is dispensed in metered units under control of an adjustable needle valve. The needle valve is provided for controlling the rate of feed of the liquid to the utilization device, and is accessible for adjusting the liquid flow while the pump is in operation. The reservoir is also provided with vent means to prevent impediment of liquid flow and, also, to permit liquid flow immediately in response to initial start-up and operation of the pump.

Abstract: The camera portion of a photocopy machine employs a vacuum platen type of transport for moving photoconductive sheets into exposure-position.The sheets are of one standard size, and are normally properly filled when imaged in one-to-one size relationship with the original, but less than the full sheet is imaged whenever a reduction mode is imposed.The photoconductive sheet is blanket charged over its entire surface before it moves to the image area and therefore, if less than the full frame is exposed, there will be large areas of residual field which will pick up toner and produce toned marginal areas, which is undesirable and wasteful. Whenever the photoconductive sheet is a master, the residual field will print the block in ink on every copy, usually rendering them unfit for use.

Abstract: An ion modulator having a bias electrode which is independently controllable improves the modulation and focusing of projected ions. Such a modulator is constructed so as to reduce the adverse effects of corona discharge upon the modulator.

Abstract: The magnetic brush arrangement provides for the formation of a brush-like mass made up of a pulverulent mix of carrier particles and toner particles supplied in measured amounts. Measured amounts of developer particles are picked up in the flutes provided on the surface of a rotating drum which is partially immersed in the granular mass. The flutes are axially parallel to the axis of rotation of the drum and it is the volume capacity of the flutes that determines the quantity of developer mix picked up and conveyed to a developing station. At the developing station there is provided a series of cylinders having disposed within magnetic flux generating means so as to attract the granular mass of particles from the flutes and pass it along the series of cylinders in the form of a moving carpet of developer mix.