Abstract: An apparatus in which an altered copy of an original document is produced. An editing device associated with an electrophotographic printing machine changes the information in the original document and generates a signal indicative of the changes therein. A liquid crystal display overlays the original document. The areas selected for editing are indicated on the liquid crystal display.

Abstract: A color printer/plotter includes a frame having a paper inlet, a number of print stations, and a paper outlet. The paper is pulled past the print stations by a single driver at the paper outlet. Each print station includes a electrostatic charging head having a flat charging surface against which a first roller, typically having a foam outer surface, presses with the paper therebetween. Immediately downstream of the charging head a toner roller supplies toner to the paper, the toner adhering to the charged areas on the paper. A second pressure roller presses the paper against the toner roller. The second pressure roller is offset slightly upstream of the center of the toner roller to aid toner roller-paper contact. The sizing and positioning of the toner and second pressure rollers is such so as not to significantly deflect the paper from the substantially straight paper path between the paper inlet and paper outlet.

Abstract: There is disclosed a paper feeder apparatus attached to a printer or other device. The paper feeder apparatus employs two trays each of which are capable of accommodating papers of different sizes and an envelope tray for accommodating envelopes. The feeder is controlled by a host computer of the type capable of generating feeder and printer control commands. These commands are transmitted to control logic associated with the paper feeder which control logic is under control of a microprocessor. The microprocessor assumes complete control of the entire paper feed mechanism and communication to the printer. Thus, the microprocessor operates two motors associated with the paper feed path. A first motor is operated so that a sheet of paper can be withdrawn from either of the two trays and then transported along a paper path.

Abstract: There is disclosed an image processing system for enabling efficient image formation, preparation of plural copies and easier image synthesis. For this purpose the system has a page memory in which the image information can be stored and can be synthesized with another image information which is sent directly from an image reader to an image output device.

Abstract: An image output device has a plurality of memories each capable of reading and writing parallel data transferred in, means for instructing reading of the image data parallelly written in parallel in the memories, and a plurality of dot forming means for forming dots in accordance with the image data read from the memories.

Abstract: Identification of constant grey components in electronic screening by first determining from the continuous-tone input, the maximum value of grey, the minimum value of grey and the average value. The average value is used to determine how many white bits are to be turned on in the halftone dot generated. Since "Moire" problems only occur only from the fluctuating part of the input, the three grey ranges corresponding to the minimum, the maximum and the fluctuating portions of the grey found in the area are then treated separately. The minimum and maximum grey levels identify constant levels within the grey area. That is, every point is at least as light as the minimum and every point is no lighter than the maximum. A template black dot corresponding to the amount of black in the maximum light grey area is generated and correspondingly a template white dot corresponding in size to that for the minimum grey level is generated, and compared to those actual dots created by ordinary halftoning.

Abstract: A shadow printing operation is provided in a laser recording apparatus only for data which is detected to be character data. Line memories are utilized to store data therein, and examined to determine any change of stored data from non-character data to character data whereupon a shadow printing operation is also preferred.

Abstract: A printer/feeder apparatus of the type having: (i) a feed/transport platen rotatable so that its peripheral surface moves past a sheet supply zone, a print path ingress, a print zone and a print path egress; (ii) frictional feed surface located on a peripheral sector of the platen surface and (iii) means for selectively effecting feeding engagement between the face sheet(s) of a stack of sheet media and the feed surface features a detection/control system that includes (a) a first detector for sensing and signalling when and when not a forward edge of the feed surface is at a predetermined start position; (b) a second detector means for sensing and signalling when and when not engagement condition exists; (c) a third detector means for sensing and signalling when and when not a sheet is located along a predetermined portion(s) of the print path; and (d) a control system for receiving signals from the detectors and enabling printing cycles and signalling error conditions.

Abstract: The present invention provides an intensity control device for a laser in a laser beam printer that produces a hard copy of image information by copy-processing a photosensitive surface scanned by the laser while it is in a scanning mode during which the laser is modulated by the image information. The intensity control device according to the present invention stores a first representation of a present light intensity of the laser during its non-scanning mode. It further stores a second representations of a user selected image density for a hard copy produced by the printer. The first and second representations are combined for forming a control voltage during a non-scanning mode of the laser. Finally, a current is produced that is supplied to the laser in response to the control voltage such that the intensity of light produced by the laser is dependent on both the first and second representations.

Abstract: An image display apparatus includes a first image carrier along with an apparatus for inputting an image signal. An erasable image is formed on the first image carrier in accordance with the image signal input from the image signal input apparatus. A display area displays the image formed on the first image carrier. A second image carrier, which is associated with the first image carrier, contains a visible image which is photoelectrically read and converted to an image signal. The visible image carried on the second image carrier is automatically erased after the visible image is converted to an image signal.

Abstract: An image forming apparatus comprising an original table for holding an original document and an area designation sheet, the area designation sheet to be read a surrounded area written thereon to designate a copy required area of the original document, a scanner for optically scanning the area designation sheet placed on the original table to obtain a light image of the surrounded area therefrom, a optical reading unit for generating electrical signals in response to the light image of the surrounded area corresponding to the required copy area designated on the area designation sheet, a memory for storing the electrical signals generated by the optical reading unit, a charge erasing unit for erasing selected portions of the electrostatic charge on the image carrier, and a controller for controlling the charge erasing unit to erase the electrostatic charge on the image carrier than in the copy required area to be copied, according to the electrical signals read from the memory.

Abstract: The present invention provides a method for controlling the movement of a print medium to be printed, for example, in a facsimile device. The invention uses printing velocities for each line (or printing unit) to be printed, which are calculated based on the number of black picture elements in the image signal related to this line (or picture unit). These calculated printing velocities are stored each for succeeding line to be printed and are then used to determine the moving velocity of the print medium for the actual line being printed.

Abstract: According to the invention, the colors of an original image are identified by a photoelectrically converting device that is movable in, e.g., the optical path of an optical system, developing units containing different color toner agents that are selectively driven based on the identification data, and an erasure array is operated to perform color image formation corresponding to the original image. More specifically, two CCD line sensors having different color filters that are arranged adjacent to each other as the photoelectrically converting device, so that the colors of the original image can be identified through a single exposure scanning operation.

Abstract: An electrostatographic machine is disclosed with at least one adjustable process control parameter. The machine receives and electronically stores electrical image information signals of an original. A reproduction of the original is created using the received electrical image information signal, and a second electrical image information signal is in turn created from the reproduction. The second electrical image information signal is compared with the first electrical image information signal to produce an error signal representative of differences therebetween. The process control parameter is adjusted in response to the error signal to minimize said differences.

Abstract: Herein disclosed is a recording apparatus for using a semiconductor laser 1 as a light source so that the scanning operation may be conducted with the laser beam which has been modulated on the basis of picture information. The drive current of the semiconductor laser 1 for making the monitor current of an optical output constant is determined before the beginning of a recording period so that the drive current may be used as that of the semiconductor laser 1 during the recording period.

Abstract: An image forming apparatus wherein the pulse width of an information signal for forming an information beam to be projected onto a photosensitive member is different depending on the image density of the image to be formed. An image density information of a latent image or a displayed image formed with the use of the information beam modulated in a reference signal is detected. In response to the result of the detection, the pulse width or the level of the information signal is controlled.

Abstract: There is disclosed an image recording apparatus in which an image is read with an image sensor such as CCD and is supplied to light emitting diodes as recording elements for recording on an electrophotographic drum. The image data from the image sensor are stored in plural memories in parallel manner. A control circuit is provided for controlling the drive signals applied to each of the diodes, to drive such diodes a plural number of times in accordance with image signals applied thereto.

Abstract: A copying apparatus wherein an original supported on an original support is read by a reading head, which produces electric signals corresponding to the image. A recording head forms an image of the original on recording paper in accordance with the electric signals. The reading head and the recording head are in substantially the same place, whereby the size of the apparatus can be reduced.

Abstract: An image-processing apparatus, can function as a copier and also as a printer, has first and second image-forming units, a switching unit and an output unit. When the first image-forming unit is selected by the switching unit, images are formed on a recording medium by the light from an original to be copied. When the second image-forming unit is selected, images are formed by controlling the transmission of light. The images formed on the recording medium are provided by the output unit.

Abstract: An image forming apparatus capable of transferring a color pattern of an original onto a copying sheet in two modes: a nonlap print mode or a lap print mode. In a nonlap print mode using a two color original, color signals of light produced by reading the original pattern are converted into color signals of ink of the same colors as the original pattern. Then the original pattern is reproduced by using a transfer ink ribbon arranged the same colors as that of color signals of ink without lap transfer, that is, by transferring ink of one color on one PC cell of the copying sheet.

Abstract: An image building apparatus of the type including a scanner section for reading image information of an original placed on the original holding board by scanning it during movement thereof and a printer section for building an image on printing paper by activating the recording head in response to image information transmitted from the scanning section. Arrangement is made in accordance with the order of the scanner section and printer section as seen from the fore side of the apparatus. The scanner section moves in the transverse direction as seen from the fore part of the apparatus, whereas printing paper in the printer section is transported in the direction at a right angle relative to the movement of the scanner section.

Abstract: A process for electrophotographic matrix printing and apparatus for carrying out this process, the apparatus comprising a plane assembly of modulating strips disposed alternately along two parallel lines, an optical light guide for guiding the light emitted by a virtual pinpoint light source in the form of two convergent light sheets respectively traversing the two lines of modulators, and a rotary drum whose lateral surface consists of a photosensitive support. The optical light guide is formed of a plate with plane parallel surfaces, bounded by three rims. The first rim has a toroidal form whose center corresponds to the position of the source; the second rim has a cylindro-parabolic form and the third rim comprises a dihedron whose edge is parallel to the plane faces of the guide. Writing can be effected line by line along a direction substantially parallel to the axis of rotation of the photosensitive support.

Abstract: An optical recording device for producing images as a whole at a predetermined scale size includes a beam oscillator for producing a beam, a scanner for line-scanning the beam produced by the beam oscillator, a recording mechanism for receiving the line-scanned beam in the form of a scanned spot and for recording an image formed by the scanned spot, and a variably sized aperture for receiving the beam and determining the size of the scanned spot.

Abstract: There is provided an image forming device wherein a half-tone pattern having a recording portion and non-recording portion is formed on a recording medium, a value corresponding to the image density of the half-tone pattern is detected, and a high quality half-tone is obtained by controlling image signals by the above detection output or quantization means for the binary or multi-value conversion of image signals.

Abstract: A rotatable head type electrophotographic apparatus comprises a rotatable head supported on a moveable table and having a corona charging electrode and a light source secured thereto to face outwardly of the circumferential surface thereof. A development processing unit is supported on the moveable table close to a photosensitive material supported on a platen having a curved supporting surface. The light source is driven in accordance with a predetermined modulating signal to form an electrostatic latent image in the photosensitive material when the rotatable head is rotated and moved above the photosensitive material. The latent image is immediately developed by processing liquid flowing in the development processing unit along the surface of the photosensitive material.

Abstract: A printer has print paper feed means, print means for printing on the print paper, a memory for supplying a print data to the print means and input means for inputting a temporary stop request for the printer. When the temporary stop request is issued during the print operation, the data is continuously outputted from the memory means until the print operation to the print paper already fed is completed, thereafter outputting of further data is inhibited and the printer is stopped after the print paper has been ejected.

Abstract: A color image forming apparatus and method in which the color image information of the document, supplied from a reciprocally moving scanner is converted into color component signals corresponding to the color components of the ink ribbon. These component signals are sequentially supplied to the thermal head for each color component signal, and they are overlappingly transferred and copied onto the copy paper one color at a time. The scanner scans only the number of times equal to the number of color components of the ink ribbon. One color component signal is sequentially supplied to the thermal head at the time of each scanning, and the image of one color is formed simultaneously with the scanning. The copy paper is repositioned after each scanning and the process is repeated until all color components have been applied to the copy paper, thus producing a color copy of the original document.

Abstract: In an image recording apparatus for recording images by modulating a light beam by information signals and applying the light beam to a recording medium, the longitudinal mode of the light beam is multiple, that is, comprises a plurality of oscillation wavelengths.

Abstract: An image forming apparatus with area selection and confirmation the apparatus including an original table, a transmission light emitting section, provided movably along the original table, for emitting transmission light through the original placed on the original table, an erasure area specifying section for shifting the light emitted from the transmission light emitting section to an unnecessary portion of the original so as to specify a portion to be erased, an erasure area storage section for storing position data indicating the erasure portion specified by the erasure area specifying section, a checking operation designating section for designating a predetermined checking operation including confirmation of the erasure area specified by the erasure area specifying section, a first control section for reading out the position data stored in the erasure area storage section upon designation of the checking operation designating section and for supplying to the transmission light emitting section a control

Abstract: A facsimile receiver of the type in which a laser beam modulated by a received video signal scans a light sensitive recording paper to print an image corresponding to the video signal. A feedback loop insures that the output of the laser beam acousto-optical modulator (AOM) accurately tracks the demodulated received video signal. A variable transmissivity filter in the path of the laser beam is automatically positioned to provide increased transmittance as the laser beam intensity decreases with aging of the laser, so as to maintain a constant light output intensity. A lens in the optical system which focuses the laser beam on the paper is moved mechanically as the paper is transversely scanned, so that the focus of the beam is varied to compensate for the planar (non-cylindrical) configuration of the paper, thus keeping the beam focused on the paper throughout the length of each scan line.

Abstract: The apparatus includes an original table, a transmission light emitting section, an erasure area specifying section for shifting the light emitted from the transmission light emitting section to an unnecessary portion of the original to specify a portion to be erased, a memory, a first controller for causing the memory to store position data representing the portion to be erased specified by the erasure area specifying section, a data hold request section, a data holding section, having a holding medium for holding written data, which can repeatedly read out the data held in the holding medium, a second controller for reading out the position data stored in the memory to hold it in the data holding section upon request from the data hold request section, a held data readout request section, a third controller for reading out the position data held in the data holding section so as to temporarily store the readout data in the memory upon request from the held data readout request section, an original scanning

Abstract: A fluid jet assisted ion projection copier including a marking head incorporating an array of thin film ion modulating electrodes and photosensors integrated upon a single substrate. An optical projection system places incremental images of light and dark areas from an original to be copied onto the photosensor array. The marking head is mounted upon the ion projection housing, adjacent an outlet channel thereof for controlling the passage of ions out of the housing in accordance with the projected pattern of light and dark areas.

Abstract: The present invention provides an image display apparatus including an image bearing web in the form of an endless belt on which an erasable image is formed, the image being carried into an image display section for observation. If the image bearing web is photosensitive, it is affected by the light, resulting in the deterioration of the image formed. To avoid this, the length of the image bearing web which is used to form one complete image is made equal to the full length of the web divided by a non-integer. Therefore, that position on the image bearing web which is used to form an image to be displayed will be changed for each display to distribute the effect of the light over the entire length of the photosensitive web.

Abstract: An image reproducing apparatus wherein latent images are formed on an image retainer by a plurality of latent image forming device and the latent images are developed by developing means to which a developing bias is applied. The developing bias can be applied in accordance with the difference of the latent image forming device. One of the latent image forming device is a continuous tone latent image forming device and the other is a dispersed tone latent image forming device.

Abstract: A process for use of a low-cost personal computer to display video images which provide the effect of animation in synchronization with an audio program, such as voice or environmental sounds, originating independently of the computer. The computer is provided with a data base including intervals between recorded cue tones preceding the audio program, and intervals between video events to be synchronized with the audio program, all such original intervals corresponding to the original recording transport speed of the audio program. While consumer audio playback devices operate at a stable playback transport speed, it is seldom precisely the same as the original recording speed. During playback, the viewer indicates playback intervals between cue tones, for instance by tapping a key of the computer keyboard whenever a cue tone is played.

Abstract: There is disclosed a recording apparatus capable of easily overlaying two images. One image is read photoelectrically and supplied as electrical signals, while the other image is stored in a read-only memory and supplied as electrical signals. The read-only memory is also used for storing control information for the overlaying process.

Abstract: An improved electrographic stylus recording apparatus wherein magnetically attractable toner powder used during imaging, but not forming a part of a toner image, is returned from one side of a stylus array to the toner powder hopper of the apparatus. The toner powder is transported around the stylus array by the use of fixed magnets disposed within two rotatable cylindrical sleeve members disposed on opposite sides of the stylus array. A further cylindrical sleeve member having a rotatable magnetic field producing means within the sleeve attracts toner powder from the cylindrical sleeve disposed on the toner powder hopper side of the stylus array for delivery to the toner powder hopper.

Abstract: A system for controlling satellite beams in either a tangentially or sagittally offset optical alignment of the type used with raster scanners without introducing objectionable cross scan bow to the image line wherein the axes of the input beam is set at a predetermined small angle to the scan plane axes of the scan lens and the rotating scanning element are set at a predetermined small opposing angles to one another with respect to the scan to promote divergence of any satellite beams and thereby facilitate intercepting and blocking thereof without interfering with the imaging beam, the angular relationship between the axes of the input beam and scan lens and the axis of the scanning element minimizing cross scan bow of the image line at the image plane.

Abstract: An interruption control system for an image forming apparatus with a scanning means for optically scanning a document comprises an image forming means, including a feed section for feeding an image forming medium, an image forming section for forming an image on the image forming medium using image information derived from the scanning means, a temporary storing section for temporarily storing the image forming medium when the image forming section forms an image, and a discharge section for discharging the image forming medium bearing an image formed by the image forming section.

Abstract: An image output apparatus prints an image of an original document and compares the printed image with the original document. Information representative of the original document operates a printing unit for printing an image of the original on a sheet of paper supplied from a paper feeding device. An image sensor senses the image on the printed paper and provides information representative thereof. The information from the image sensor is compared with the information supplied from the original document.

Abstract: A solid state corona discharger in corona chargers which charge and discharge photosensitive members in electrophotographic copying machines, ozone generators and the like. The solid state corona discharger has paired strip-shape ac electrodes which are arranged side by side nearly in parallel and spaced away from each other not to initiate discharge, a dielectric member layer which covers at least one side of the external surfaces enveloping both electrodes, and a thin dc-applied electrode which is in contact with one side of external surface of said dielectric layer and makes up a closed circuit loop of capacitances together with said ac electrodes (not connected in terms of direct current), as well as characterized by producing corona discharge between said ac electrodes and a dc-applied electrode with an ac power supply applied across said ac electrodes.

Abstract: The present invention relates to a method and apparatus for non-impact, single-pass printing in which the toner exhibits a selective or "tuned" response to an agent having a preselected characteristic, such as light energy of a particular frequency emitted by a laser, to impart an image to a printing surface or substrate.

Abstract: Print enhancement circuits for an electrophotographic printing machine are placed between the character generator and the printhead to modify drive signals for the printhead. Modifications include smoothing the digitized edges of slanted lines; broadening single pel width lines in the direction perpendicular to the scan direction as well as in the direction parallel to scan. Inhibiting circuits are provided to prevent passage of enhancement signals under certain conditions. Generally, leading and trailing edge gray signals are provided next to all black data in a direction parallel to scan while expanded black signals are provided for the single pel data in a direction perpendicular to scan by adding to the black signal on both its leading and trailing edges.

Abstract: Electrophotographic apparatus capable of being operated in the copying mode and scanning mode and in the printing mode and scanning mode, in which a latent electrostatic image, formed on the photoconductor, is developed. The photoconductor has a light-reflective surface. After the latent electrostatic image is developed, a focused laser beam or focused light beam scans the developed image and specularly reflected light from the photoconductor surface is directed onto a photodetector. The output of the photodetector is encoded and may be transmitted or stored. The developed image is not destroyed, and it can then be transferred to a carrier sheet if desired.

Abstract: An image-forming apparatus equipped with an optical means, an electrostatic image-forming means and a control means. The optical means projects a scanned light beam to be controlled according to an image to be formed. The image-forming means receives the scanned light beam projected from the optical means and forms an image corresponding to the scanned light beam. The control means controls the optical means and the image-forming means.

Abstract: A system for detecting and measuring fast scan jitter having first and second photosensors combined in a unitary detector positionable in the path of a scanning beam; means for generating a packet of test pixels for modulating the scanning beam for jitter through a succession of scan lines; said first and second photosensors outputting signal pulses representing the intensity of said scanning beam following modulation by said test pixels; a differential integrator for integrating the signal pulse outputs of said first and second photosensors with one another to provide a test signal for each line scanned; a filter for smoothing said test signal, an amplifier for amplifying said test signal, a peak to peak detector for comparing the test signal of one scan line with the test signal from the succeeding scan lines to provide a jitter signal where said test signals are different; and a meter for converting said jitter signal to a visual readout.

Abstract: An image recording apparatus capable of responding to high-speed input image signals by dividedly storing image signals of a line into plural memory units, for parallel output, for example, thus achieving higher speed of signal storage than the speed of signal readout.

Abstract: This specification discloses an imagewise information processing method and apparatus in which imagewise information is stored in a memory, the imagewise information is read out and reproduction-processed and after the reproduction processing is all completed, the imagewise information stored in the memory can be automatically erased.

Abstract: An image recording method capable of allowing an optical scan type electrophotographic recording apparatus to record images with a high resolution. The pulse width of video data adapted to modulate a light beam is varied. An optimum light beam scanning condition is provided which causes the pulse width of binary video data to be controlled to suitably vary the power of an exposing beam such that a latent image potential difference at a boundary between an image portion and a non-image portion is increased to enhance electrostatic contrast, thereby recording images with a high resolution. In an optical scan type electrophotographic recording apparatus of the type using minute light emitting segments as a light source, a latent image is formed with high electrostatic contrast. A light beam condition and a light beam scanning condition are provided which makes the pixel diameters of an image to be developed in the main scan and subscan directions equal to each other.

Abstract: A driving method for an optical printer and an optical printer having a liquid-crystal light switching element including a ferroelectric liquid crystal sandwiched between a pair of plates provided with electrodes on adjacent surfaces thereof. The liquid-crystal light switching element is disposed between a light source and a movable photosensitive surface and controlled so as to at least one of transmit and block light from the light source to the photosensitive surface for enabling a printing operation. Voltages v.sub.1 and v.sub.2 are applied to the liquid-crystal switching element substantially in accordance with the equation ##EQU1## and the intensity of light from the light source incident on the liquid-crystal switching element is controlled so that incident light intensity during a period T.sub.2 is weaker than the incident light intensity during a period T.sub.1, where t.sub.0, t.sub.1, t.sub.2 and t.sub.3 represents times, T.sub.1 (=t.sub.1 -t.sub.