Abstract: An image forming apparatus of the type producing a single composite color image on a paper which is transported by a belt by transferring image components of different colors to the paper in register with each other. The apparatus reduces with a simple construction the positional deviation of the image components which occurs in an intended direction of paper transport. Recording devices individually adapted for black, cyan, magenta and yellow are arranged side by side. Pattern images for measurement each being associated with a respective one of those colors are formed on the belt. A timing at which each of the pattern images arrives is sensed and counted. The count is compared with a reference value to calculate an amount of deviation. Write start timing signals each being associated with a particular color are generated which are individually variable on the basis of the deviation calculated.

Abstract: A cylindrical lens for use in a light beam scanning optical system is arranged to have luminous flux enter a deflection device for converting it into a straight line along a plane perpendicular to a rotation axes of the deflection device. The luminous flux deflected by the deflection device is turned over by the concave surface of a cylindrical mirror or spherical mirror to converge on the surface of a photoconductor through the cylindrical lens. The deflection device with the cylindrical lens and cylindrical mirror or the spherical mirror provided behind the deflection device in the light path fullfills the following equations..vertline.s/R.vertline..gtoreq.0.50.15<d/.vertline.R.vertline.<0.45(.vertline.d.sub.2 .vertline.+.vertline.d.sub.3 .vertline./.vertline.R.vertline.<0.

Abstract: A method for photothermal information recording, reading and erasing consists in that the surface of a recording medium (1) is charged prior to the photothermal recording process and then exposed, during photothermal information recording and erasing, to a modulated electromagnetic beam (8) localized to a spot size of the order of one information unit with the energy exceeding the energy required for softening the material of the recording medium (1), and, during information readout, with the energy less than that for softening the material of the recording medium (1), the surface of the recording medium (1) being discharged before erasing information.

Abstract: A flexible electrostatic recording medium used in conjunction with an electronic blackboard includes a base layer composed of a synthetic resin, a conductive layer formed on the base layer, and a dielectric layer formed on the conductive layer by a thin transparent film, preferably of polyvinylidene fluoride, and adhered to the conductive layer by means of an adhesive.

Abstract: Electric-photosensitive printing is accomplished with an LD providing a laser scanning beam that is modulated to affect printing, and the power output of the LED is maintained constant through negative feedback by a holding voltage provided by a capacitor having its charge determined only during a non-printing portion of the printing period wherein a plurality of sheets are printed. During the non-printing period, contact of the scanning laser beam with the electro-photosensitive material is disabled while the laser beam is maintained on so that its power may be measured and compared with a reference level to provide a feedback signal for controlling the output of the laser beam, particularly the feedback signal being provided to the holding capacitor only during the non-printing portion of the period, and the holding capacitor being isolated from the feedback signal during the printing portion of the period.

Abstract: An image system can output image information to a plurality of output devices at a time, has a function to print, display, or store an image information before all of the image information is completely read out, and has a function to output an image information stored in a memory device by using an interface, before the completion of reading all of the image information. The image processing system includes for an example a readout device for reading image information; a storage device for storing the image information from the readout device; an output device for printing or displaying the image information from the readout device; an interface device for outputting a read-out information to the output device before the image information is completely read out; wherein the image information from the readout device is stored into the storage device by using the interface device.

Abstract: An image processor includes a light source, a scanner for scanning an original document using the light source, an imager for forming an image on the basis of light reflected from the original document and a light from the light source, a controller having a plurality of electro-mechanical transducer elements arranged in a light path from the light source to the imager, a generator for generating image data, and a driver for driving the controller in accordance with the image data. The driver drives the light controller in accordance with the image data, thereby causing the imager to form an image corresponding to the image data. The light source is adapted for forming an image corresponding to the original document and an image corresponding to the image data.

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. The information is stored in an erasable read-only memory. The erasable read-only memory is inserted into the copying machine to conrol the formation of the copies so as to correspond to the edited original document.

Abstract: The object of the present invention is to provide an image forming apparatus capable of enabling high-speed continuous copy of a same single-color image, wherein the apparatus is incorporated a shift register between an image reader and a laser beam generator for performing imagewise exposure onto a photoreceptor. The shift register has a circulation circuit connecting between an output and an input side thereof. After an image data corresponding to a sheet of original document is inputted into the shift register, the circulation circuit is actuated and circulates the image data, thereby repeatedly outputting the image data to the laser beam generator by the number of required times.

Abstract: An image forming apparatus having an image carrier, a document table on which a document is placed, and a document feeder associated with the document table for feeding and document onto the document table, the document feeder including a document carrier for carrying the document and a designating unit for designating an image blanking range of the document placed on the document carrier.

Abstract: In a two-page printer system, there is included a first and second print engine placed on a path in which paper to be printed travels and displaced a distance, L, from one another along the path, the first print engine printing a first side of the paper and the second print engine printing a second side of the paper. The two-page printer system also includes an apparatus for coordinating the printing of the paper, the two-page printer further including a process controller for generating control signals. The apparatus comprises a first storage element for storing information to be printed. A processor element, operatively connected to the first storage element, formats the information to be printed in a form required by the printer, the information to be printed being fetched from first storage element.

Abstract: In a color copier, color infidelities in the copied image resulting from overlapping spectral absorption characteristics of the cyan, magenta and yellow layers in the recording material and from the superposed spectral sensitivities of the red, green and blue decomposition systems in the reader/scanner of the original are compensated for by determining the mixture components in advance using a shade wedge, and subtracting such components during the copying process.

Abstract: An image forming apparatus which produces image data by reading an original document, modulates a light beam to be radiated from a light emitting element by the image data, and exposes an electrophotographic conductive element imagewise by the light beam modulated. The power of the modulated beam is varied dot by dot in association with tones. The apparatus renders multiple tones without lowering resolution.

Abstract: An optical information carrier includes a cylinder (1) with a recording layer (2) and bushings (3,4) located at butt ends of the hollow cylinder (1) and insulating the recording layer (2) from the environment. A method for erasing information recorded on the optical carrier uses a high-frequency electrical discharge is produced inside the air-tight closed space (5) of the hollow cylinder (1). An optical storage device realizing the method includes an erasing unit (11) having a circuit for initiating a high-frequency discharge, which has electrodes (12,13) between which the optical carrier (10) is located so that the high-frequency discharge is initiated inside the closed air-tight space (5).

Abstract: This invention concerns an image processing system which is constructed by combining a plurality of image readers each adapted to read an image electrically and produce image data as output and a printing means for producing the image on a recording medium based on the introduced image data. During the course of transfer of an image signal from the image readers to the printing means, the image processing system automatically delays the actuation of the image readers when the mode of prohibiting the transfer of image signal exists, whereas the image processing system automatically actuates the image readers immediately after the mode of prohibiting the transfer of image signal changes to the mode of permitting the transfer.

Abstract: There is disclosed an apparatus for obtaining image signal by tonal processing of an input signal. Pulse-width modulation of the input signal is achieved thorugh comparison with a second signal of a predetermined shaped, for example a triangular signal. In order to avoid the influence of fluctuating factors in pulse-width modulation, the apparatus also has a third signal generator, and the pulse-width modulated signal or a pattern signal generated by the third signal generator is selectively used for image formation.

Abstract: A color image processing apparatus wherein different color filters are provided in an image pickup device corresponding to plural groups of small pixels, each group of which is one unit of color pixels, and color image signals are obtained from the common position of the small pixel groups by suitably interpolating color image signals obtained from the small pixel groups.

Abstract: A laser printer includes an optical scanning system for scanning a laser beam carrying image information to be written across a photosensitive member repetitively to thereby write an image on the photosensitive member. In the present laser printer, the frequency of a pixel clock is varied in accordance with the pixel density or line speed, thereby maintaining the light intensity of the laser beam in each pixel substantially at constant. Preferably, the optical scanning system includes a first optical system leading a laser beam emitted from a laser to a rotating polygon mirror and a second optical system for leading the laser beam deflected by the polygon mirror to a photosensitive drum, whereby a first light path defined by the first optical system and a second light path defined by the second optical system cross each other at different elevations at least partly.

Abstract: A recording signal generating circuit for printing comprises a shift register for sequentially storing image information on a predetermined number of consecutive pixels. A recording signal pulse width setting circuit normally sets a pulse width of a recording signal for each of a pixel information to a standard pulse width. The setting circuit sets a pulse width of the recording signal for a pixel positioned at the center of the shift register (a pixel of interest) to a wider pulse width when an isolated black pixel pattern is detected. Alternatively the setting circuit sets a pulse width of the recording signal for one of the pixels just preceding and following the pixel of interest to a narrower pulse width when an isolated white pixel pattern is detected.

Abstract: An electrophotographic recording apparatus for a facsimile device in which an exposure unit and a developing unit are disposed on the opposite sides of a photosensitive body to thereby perform simultaneous exposure and development at the same position. The respective processes of the electrophotographic recording operation, i.e., exposure, development and transfer processes, rotation of the photosensitive body, and paper conveyance are performed synchronously with the timing at which image data for each line is received.

Abstract: This invention relates to a digital color printer which executes printing of plural colors with electrophotographic means for certain rounds corresponding to the number of printable colors. The digital color printer of the present invention has a buffer memory wherein image signals scanned by image sensor are written, and wherefrom image signals are sequentially read in the written order. Due to ring-shaped constitution of buffer memory, the digital color printer precisely prints color image without causing color deviation by means of controlling timings for starting the image writing and reading operations.

Abstract: There is disclosed an image forming apparatus for achieving plural image processing modes. The original image is divided into plural areas, and a monocolor or multi-color reproduction is selected for each of the thus divided areas, so that the resulting reproduction contains a mixture of monocolor image areas and multi-color image areas.

Abstract: A copying apparatus includes an exposing unit for exposing an original document, a memory, a circuit for causing a plurality of original document images to be stored in the memory, a read out circuit for reading out the original images from the memory, a printing unit for printing the read out image on a copy medium, a manual numerical input device, an addressing circuit for selectively addressing a desired one of the document images stored in the memory in accordance with a data entered by the numerical input device, and a control circuit for controlling the read out circuit by the addressing circuit so as to read out the desired one document image selected by the addressing circuit and print the same on the copy medium. The control circuit is adapted to repeat the read out of the selected image from the memory so as to repeat copying by a number of times entered by the numerical input device.

Abstract: An image forming apparatus in which the electrostatic latent image formed on the latent image bearing member can be developed into an arbitrary state, or separate image information can be incorporated at the development of the latent image on the latent image bearing member. More specifically the latent image on the image bearing member is developed with electroconductive toner, in cooperation with electrically independent fine line-shaped developing electrodes supplied with determined bias voltages.

Abstract: An apparatus for decoding compressed image codes ensures exact synchronization of decoded image signals by differentiating the decoding process in response to the detection of a particular code.

Abstract: A xerographic copying/printing machine in which the photoreceptor has a row of discrete image marks along one side margin, a CCD type array spaced opposite to and aligned with the row of photoreceptor marks to provide successive blocks of image signals representing the instantaneous pattern of marks viewed by the array on each scan, a light bar spaced opposite the other side of the photoreceptor and aligned with the array for illuminating the array sensors through the marks, and a circuit for converting the image signal output of the array to clock signals representative of photoreceptor speed and position.

Abstract: A color image processing system having an under color removal (UCR) function is provided. A mode set switch is preferably provided to set the UCR function to be operative or inoperative selectively. An UCR rate setting unit is preferably provided so as to varyingly set the UCR to be applied to color image data. Data of four color components, including cyan, magenta, yellow and black, are processed. In the preferred embodiment, the three color components other than black are processed and printed first, and, then, a black component image is printed at the end.

Abstract: Disclosure is made of an optical memory wherein a cylindrical information carrier (2) is disposed in a stationary cylindrical container (14) filled with a liquid or gaseous medium transparent for the radiation flux emitted by a source (1) of modulated coherent radiation. The cylindrical information carrier (2) is equipped with a rotational drive. A recording coating (12) is applied on a tubular base (11) of the cylindrical information carrier (2). The cylindrical information carrier (2) is optically connected with the source (1) of modulated coherent radiation and with an addressing unit (3) arranged so that its optical elements can move axially with respect to the cylindrical information carrier (2).

Abstract: A recording apparatus such as a laser beam printer has a plurality of photosensitive drums and a plurality of laser beam emitting means associated with the respective photosensitive drums and adapted for forming latent images on the respective photosensitive drums. Controlling means are provided for controlling the laser beam emitting power of the respective beam emitting means, in accordance with the result of a determination as to whether the potential of the surface of at least one of the photosensitive drums is at a normal level or whether the laser beam emitting means is at a predetermined level.

Abstract: A laser-beam printer having a drum with a photoconductive surface, and an optical system which includes a laser source generating a laser beam and an optical deflector for deflecting the laser beam over a predetermined angular range. The photoconductive drum surface is scanned by a linear sweep of the laser beam and thereby given an electrostatic image pattern to be transferred onto a recording medium. The optical deflector includes a single substrate which has a waveguide formed therein for guiding the laser beam, and a deflector portion provided on the substrate for deflecting the laser beam which is propagated through the waveguide, so as to cause the laser beam to scan or sweep the photoconductive surface of the drum over the predetermined angular range.

Abstract: An exposure control system which permits accurate reproduction of optical density levels on a final image is characterized by a dynamically corrected look-up table. The look-up table is used to calculate each desired exposure intensity level for each image pixel on the basis of data obtained during the exposure and development of an immediately preceding image.

Abstract: Disclosure is made of an optical storage device wherein a cylindrical information carrier (2) with a recording medium (12) applied on a tubular base (9) is disposed in a stationary cylindrical container (3) having a window (4) in the lateral wall thereof. A lens (5) is secured in the window (4) of the cylindrical container (3) to let through the radiation flux from a source (1) of modulated coherent radiation. The cylindrical container (3) is filled with a liquid or gaseous medium transparent for the radiation flux. The length of this cylindrical container (3) is at least twice as long as that of the recording coating (12) applied on the tubular base (9) of the cylindrical information carrier (2) equipped with drives for rotation and axial motion.

Abstract: An EL device having an electrode arrangement including first electrodes and at least one row of second electrodes intersecting the first electrodes and energized by a combination of the first and second electrodes. The second electrodes are divided into a plurality of sub-electrode portions. The electrode arrangement is such that the first electrodes each comprise a plurality of segments that are commonly-connected and intersect different sub-electrode portions. Another electrode arrangement is such that the first electrodes are arranged in a belt form and intersect different sub-electrodes portions in a meander manner.The EL device can be applied to an electrophotographic printing system as an optical system for forming a latent image. EL elements are repeatedly energized with the same data to give a sufficient intensity of light on a light sensitive medium, and deenergized for a time in which the intensity is decreased to a low level.

Abstract: An optical printer using laser beams, wherein, when a plurality (n) of laser beams are used at once to carry out a scanning operation, the positions of spots of said laser beams in both the primary scanning direction and sub-scanning direction are set so as to have the relation l=(n-1)a+m.multidot.n.multidot.a, wherein m is a positive integer (m.gtoreq.1); a the distance between the adjacent scanning lines in the sub-scanning direction on the printing surface of the optical printer after a printing operation; and l the distance between the adjacent laser beams in the sub-scanning direction on the surface of a photosensitive drum, whereby a high-quality printing effecting no overlapping and omission of images can be obtained even if the distance between the adjacent laser beams is increased during a scanning operation using a plurality of laser beams at once.

Abstract: An optical write head for an electrostatic dot-matrix image printing system which includes a plurality of controlled light emission element row-arrays positioned parallel and spaced in the direction perpendicular to the row-wise direction a distance equal to an integer multiple of the desired dot image-pitch S measured in the perpendicular direction, corrected by the fraction S/N where N is the number of row-arrays. A timed electrode drive circuit activates the arrays sequentially, and grid mask elements extending transversely across the row-arrays control emission from the individual light emission elements in an activated array, to minimize the number of drive circuit switching elements. A series-to-parallel signal conversion and storage circuit preprocesses the recording signal of the image to be printed.

Abstract: A laser diode imagesetter having multiple resolution operating modes, includes means for stabilizing the optical output power from the semiconductor laser diode during the scan trace interval across a photosensitive material so as to maintain a high extinction ratio for the laser diode even when its driving current is changed to a different level in order to operate the imagesetter at a different resolution mode.

Abstract: In an electronic printer which utilizes an image write bar, a control circuit is provided to compensate for the effects of vibration in a rotating photoconductive member, typically a photoreceptor drum. In one embodiment an encoder is positioned so as to detect spatial displacements of indicia affixed to the photoconductor surface, Correction signals are generated and sent to control circuits which adjust the on/off timing of the write bar operation and/or the intensity of the image bar output. This adjustment results in compensation for the effects of photoconductor vibration.

Abstract: An integral document processing apparatus comprising an electrophotographic copying system and a facsimile transmission system. A document fed from a common document storing unit is guided selectively to a first document read unit included in the electrophotographic copying system or to a second document read unit included in the facsimile transmission system by a document feed passage changeover mechanism which is operated selectively by an operator. A document delivered to the first document read unit is copied by the electrophotographic copying system. A document delivered to the second document read unit is converted into a corresponding electric image signal, and then the electric image signal is applied to a communications line.

Abstract: In a method of printing on a printing medium a variable thickness ink dot pattern representing an original image in response to an incoming digital data stream, a printing member, e.g. a cylinder, is formed which defines a multiplicity of discrete, independently electrically chargable capacitor microcells adjacent to a printing surface of that member. Selected ones of the microcells are activated in accordance with the incoming data stream so that the activated microcells are geometrically related to the dots in the pattern to be printed. Then, electrical charges are deposited on the microcells selected for activation at controlled variable coulombic charge levels to create at the printing surface, localized electrical fields of various strengths that are proportional to the print densities desired for the related dots in the pattern to be printed.

Abstract: A photographic printer for producing a visible image of information received in the form of a plurality of discrete electrical signals in which the signals are applied respectively to a plurality of devices each of which acts as a source of light in response to an electrical signal and which devices are arranged in an array adjacent to a photosensitive surface to direct light thereon in response to said signals thus to produce an image of the information on the surface. It is preferred form the printer is an electrophotographic printer in which the photosensitive surface is a charged photoconductor so that light from the sources produces a latent electrostatic image which may be developed and transferred to plain paper, for example.

Abstract: Apparatus and method for printing information by a raster output scanner adapted to form an image on an image-forming medium which has fixed imaging sections, and thereafter transferring the image to a receiving sheet at a repetition frequency corresponding to one machine cycle time (T). The front-end processor of the apparatus is adapted to postpone a set-up-page signal one or more whole multiples of a machine cycle time (T) by means of a prediction algorithm stored in a memory on the basis of coded signals.

Abstract: An image recording apparatus includes a frame memory for storing image information, a recording light source, a light modulator activated by the image signal stored in the frame memory for modulating a light emitted from the recording light source in a recording mode, a light scanning device, and a light shut-off device separate from the light modulator for shutting off the light emitted from the recording light source in a non-recording mode.

Abstract: A recording optical system comprises: a laser light source; means for modulating an intensity of a laser beam emitted from the light source; means for shaping a cross sectional shape of the laser beam; means for controlling the modulating means and the shaping means; and deflecting and focusing means for focusing and scanning the shaped laser beam onto the scanning surface. The laser beam size in the direction (sub scanning direction) perpendicular to the scanning direction is varied on the scanning surface by the shaping means, during the recording operation.

Abstract: An image forming apparatus with an image adding function for modifying an original image with an additional image that is not a part of the original image. The image forming apparatus includes a light-transmitting unit that moves along an original table in order to specify the desired portion of the original image to be modified. Positional data generated by the operation of the light-transmitting unit is supplied to an image-erasing unit and an image-forming unit which are controlled by a processor in order to perform the image adding function.

Abstract: An image display device includes an image carrier, an image forming station for forming an erasable image on the image carrier, a display station for visually displaying the image formed on the image carrier, and a read station for reading out the image on the image carrier and converting the image to an image signal.

Abstract: This specification discloses an image formation apparatus which is provided with an original reading-out scanner for converting an original image into a video signal and in which an original supporting table for supporting an original thereon comprises an input device capable of indicating and inputting any coordinates and the original reading-out scanner is provided in opposed relationship with the original supporting table.

Abstract: An image recording apparatus comprises first and second image recording units for respectively recording images on a recording medium. Each of the first and second recording units includes a generator for generating a horizontal synchronization signal. A transport unit transports the recording medium between the first and second recording units and first and second control units control the first and second recording units. Similarly, a third control unit controls the transport unit. A master control unit controls the first, second, and third control units according to the external inputs to the apparatus. More particularly, the master control unit includes a selector for selecting one of the horizontal synchronization signals generated by one of the generators included in the first and second recording units in response to an external input for selection of the recording units.

Abstract: A picture processing unit has an image sensor for reading the picture of an original wherein a partial region of the picture of the original is designated, and the read signal from the image sensor is processed in another region different from the partial region by a processor. A recorder records the image corresponding to the original picture on a recording body in accordance with the processed signal output from the processor.

Abstract: A copying apparatus is provided with image reading device for reading image information on an original as image element signals, indicating device for indicating the area of the original to be masked in the scanning area of the original by the image reading device, mask signal formation device for reading the masked area indicated by the indicating device, by the image reading device and for forming mask signals, and recording device for controlling the image information read by the image reading devices, by the mask signals obtained by the mask signal formation device, to obtain on a recording medium a record in which the area indicated by the indicating device is masked.

Abstract: In a recording apparatus, a developing agent image corresponding to an image information in accordance with data input through a data controller is formed on the surface of a photosensitive body by a laser scanner. The developing agent image is transferred to a paper sheet by a transfer charger, and the surface of the photosensitive body after a transfer operation is cleaned by a cleaning blade of a cleaning device. The recording apparatus comprises a developing agent applying mechanism which applies the developing agent to the surface of the photosensitive body, and which is operative when the laser scanner is not operated by a prescribed time.