Abstract: A facsimile transceiver unit utilizing a drum wherein a drum gripper bar grips an edge of a sheet to be scanned during system operation. On termination of operation, the drum direction is reversed allowing the beam strength of the scanned sheet to lift the free edge of the sheet off the drum. The sheet is then picked off by a suitable member and directed out of the facsimile transceiver unit. At the same time, the gripper bar is opened releasing the sheet for easy operator removal. In a preferred method, the sheet is bumped by the raised gripper bar to ensure release of the sheet from the facsimile transceiver unit.

Abstract: Electrostatic deflection is used in an oscillating bar drop-on-demand ink jet printer to compensate for about one half of the droplet displacement caused by bar velocity. The disclosed system provides a method for printing that is not sensitive to variations in ink droplet ejection velocity.

Abstract: Electrostatic deflection is used to provide multiline printing from a single pass in an oscillating bar ink jet printer.

Abstract: A method for eliminating mechanical crosstalk in a drop-on-demand ink jet array by inducing electrical crosstalk using passive elements, which effectively neutralize the mechanical crosstalk.

Abstract: In moving carriage ink jet printers, the motion of the carriage may be imparted to droplets expressed offsetting the droplets' position on the record surface from one another where bidirectional printing is utilized. To eliminate print distortion resulting therefrom, lines are printed two at a time, each line thus being printed by the carriage moving in only one direction.

Abstract: Electrostatic deflection is used to correct velocity induced droplet placement errors in an oscillating bar ink jet printer.

Abstract: An oscillating bar drop-on-demand ink jet printer is used to print on a continuously moving record-receiving surface. The record-receiving surface moves in a direction orthogonal to the direction of oscillation of the oscillating bar, the resultant trace being a sine wave. Electrostatic deflection is utilized to square off the sine wave to a preferred rectangular trace.

Abstract: Ribbon feed from a ribbon supply spool is controlled in an incrementing ribbon feed system by a pawl and ratchet brake device actuated by ribbon tension. The mechanism utilizes a single-band spring member to control ribbon tension and ribbon metering.

Abstract: A pulsed liquid droplet ejecting apparatus wherein a rectangular piezoelectric transducer is arranged abaxially to an ink containing channel. The edge of the transducer opposite the channel is held fixed so that on excitation of the transducer by an electrical pulse, the transducer extends towards the channel compressing it and ejecting a droplet therefrom.

Abstract: A method and apparatus for marking wherein an array of marking elements is used to mark on a continuously moving mark-receiving surface. In order to provide a rectangular grid in an efficient manner, the array is oscillated both perpendicular and parallel to the direction of movement of the mark-receiving surface.

Abstract: A scanning carriage ink jet printer is provided wth ink drying apparatus on the carriage. The dryer allows a greater variety of inks and paper to be utilized. Preferably, drying apparatus is provided on both sides of the printer, parallel to the scanning direction of the carriage, to provide for bidirectional printing.

Abstract: An impact printer of the type wherein a print wheel is rotated to a print position by a drive motor, and printing is caused by impacting a particular character on the print wheel by a print hammer. The print wheel has coarse alignment and fine alignment means formed in the print wheel. The coarse alignment means is used to drive the wheel, and the fine alignment means is utilized during hammer impact.

Abstract: A method of minimizing cross talk between transducer driven pulse ejectors in an array. The drive pulse to the transducer is optimized specifically by selection of a preferred pulse width.

Abstract: An improved suspension for an axially oscillating bar. The suspension is a trifurcated spring, the bar being attached to the central section of the spring. The spring may be mounted to act as a multiple cantilever spring. Preferably, two matching springs are used to suspend the bar.

Abstract: A simple graphic engine in which a document reading array and an array of marking elements are supported on the same support member. The support member is scanned in a direction orthogonal to the direction of relative movement between the support member and the document to be read and/or the record-receiving member. The support member is oscillated axially during scanning to reduce the number of elements required in both the scanning and marking elements.

Abstract: An imaging method which is comprised of a spatially varying imagewise output intensity for a corresponding imaging input. An imaging member comprising between two electrodes a photoconductor in contact with an about 1 to about 6 micron thick layer of nematic liquid crystalline material, which in the absence of an electrical field is in the homogeneous texture, and having negative dielectric anisotropy is utilized. A d.c. voltage above the parallel variable grating mode threshold for the nematic liquid crystalline material is applied between the two electrodes of the imaging member and, while the voltage is applied, the photoconductor is exposed to imagewise configured actinic electromagnetic radiation from a first radiation source. The actinic radiation causes the voltage to increase across portions of the nematic liquid crystalline layer in electrical contact with regions of the photoconductor exposed to the actinic radiation.

Abstract: Process and apparatus for creating a magnetic latent image capable of being rendered visible with magnetic toner without image deletion. An area of interest on a magnetizable member is recorded with a first substantially uniform spatial pattern of magnetic transitions having a transition wavelength .lambda..sub.1 capable of retaining magnetic toner on the magnetizable member and effective to substantially completely cover the area of interest upon development with magnetic toner. A second spatial pattern of magnetic transitions having a transition wavelength .lambda..sub.2 is then recorded in the area of interest in one of imagewise and background configuration; the second spatial pattern of magnetic transitions having a transition wavelength .lambda..sub.2 incapable of retaining said magnetic toner on said magnetizable member, wherein .lambda..sub.1 is greater than .lambda..sub.

Abstract: An electrical information or latent image storage system using a storage element which comprises a layer of substantially electrically insulating material having a layer of electrically photosensitive particulate material embedded therein, with a layer of semiconductor material overcoating one surface of the layer of insulating material, and an electrode on the opposite surface of the layer of insulating material. Information in the form of localized electrical charges of an electrical latent image is placed on the element by electrical or photo-electrical means, the information can be retrieved by scanning the element using an electrode-pair grid pattern, an electron beam, or other suitable means, and the retrieved information may be used, for example, through a computer, or reconstructed into a visible image corresponding to a latent image.

Abstract: Amplification of optical signals propagating through a first waveguide is achieved by modulation of high intensity light propagating through an elastomeric waveguide responsive to said signals, the modulation of the high intensity light being accomplished by an apparatus including a photodiode for registering the modulation of the optical signals and an electrode arrangement for causing corresponding light-modulating deformation of the elastomeric waveguide, the circuitry between photodiode and the electrode arrangement including a resistor and a D.C. power source.

Abstract: An imaging or transfer roller comprising mechanism to couple the roller to a ground potential close to the imaging or transfer zone, is provided. The roller includes insulator members concentric with the roller shaft and conductive sleeves on the ends of the roller.