Abstract: An arrangement for producing a variable width pulse is disclosed for use in an electrostatic printing mechanism which is adapted to produce grayscale intensity of a pixel to be printed based on predetermined digital data. The variable width pulse is formed during a clock interval which is established by a clock signal such that the width of the pulse during the clock interval is based on the digital data and corresponds to a grayscale intensity of the pixel to be printed. The arrangement includes at least a first delay line including an input, an output and a plurality of cells serially connected therebetween such that a digital signal received by the input propagates from the input to the output through the cells. Each cell includes a cell output for indication of the present state of digital data contained in the cell. A pulse generating section then provides the clock signal, as the digital signal, to the input of the first delay line such that the clock signal propagates through the first delay line.

Abstract: An electrostatic write head for writing pixels on a print cylinder is disclosed in which a continuous wave radio-frequency source is applied to a radio-frequency electrode disposed on a first side of a dielectric body. A control electrode is disposed on the second side of the dielectric body. When the voltage at the radio-frequency electrode is sufficiently high, a plasma containing electrons, negatively charged ions and positively charged ions ignites near the second side of the dielectric body. While these conditions are maintained, a varying control signal is applied to the control electrode. When a print cylinder having a conducting reference electrode is brought near the plasma, the plasma contacts the surface of the print cylinder and causes it to become charged to a voltage which directly relates to the control signal, thus writing a charged pixel on the surface of the print cylinder.

Abstract: A recording material having a compression modulus of elasticity of 650 kgf/cm.sup.2 or less in the direction of the thickness thereof and exhibiting a maximum strain of 0.08 or more generated under pressure of 40 kgf/cm.sup.2 in the thickness direction of the recording material, can record thereon electro-coagulated ink images with high clarity and color density by electro-coagulation printing.

Abstract: An apparatus and method are described for supplying material to a substrate (109). The apparatus includes a member (3) having a surface with a plurality of features (8) which locate, in use, menisci of a liquid (1) supplied to the member. An actuator (4) induces mechanical vibrations within the liquid located by the features to cause liquid droplets (7) to be sprayed. Liquid (1) is supplied to the member and electrical charge is supplied to the member and electrical charge is supplied to the liquid by, for example, an electrode (14). Electrical charge or potential is also supplied to the substrate (109) so that the droplets are directed towards the substrate to deposit material thereon.

Abstract: A electronic printing apparatus includes memory for storing a digitized image. A receiver is transported to an image forming position, the receiver including field-driven particles in a matrix that can change reflective density in response to an applied electric field. The apparatus further includes an array of electrodes for selectively applying electric fields at the image forming position across the receiver; a heater for heating the receiver to increase the temperature of the matrix so as to increase the mobility of the field-driven particles in the matrix; and electronic control circuitry coupled to the array for selectively applying voltages to the array so that fields are applied at the image forming position to the heated field-driven particles at particular locations on the receiver corresponding to pixels in response to the stored image whereby the electrode produces an image in the receiver corresponding to the stored image in the receiver.

Abstract: Provided is a liquid development apparatus which can restrain carrier liquid in a liquid developer from being evaporated and diffused into the atmosphere, which has a simple and convenient arrangement, and in which a recording medium formed thereon with an electrostatic latent image in accordance with image data is transferred and the electrostatic latent image on the recording medium is developed by a developer in a liquid developer in which toner particles are dispersed. The liquid development apparatus includes a developer supply for feeding the developer containing non-volatile components having a density of 10 to 30 wt. %, a developer holding member having a surface roughness in a range from 8 to 25 .mu.

Abstract: An apparatus for forming an image comprising a substrate with a plurality of high voltage transistors on the substrate. The transistors include a source electrode, a drain electrode and a gate electrode. Each transistor switches a marking potential of several hundred volts between the source and drain by a gate potential of at least an order of magnitude lower than the source to drain potential. There are a plurality of high voltage capacitors on the substrate. One of each capacitor is connected to one of the drain electrodes and each capacitor stores a charge potential approximately equal to the marking potential. The charge potential on each capacitor controls the forming of the image. A first data input on the substrate selectively loads a gate potential on gate the electrodes. A second data input located on the periphery of the substrate selectively loads a source potential on the source electrodes.

Abstract: For cleaning the print heads of an electrographic printer, a cleaning strip (900) or a lapping strip (1000) is applied to a medium (10) which moves through the printer. The strip (900 or 1000) is first positioned between fiducial marks printed on the medium (10). Then a solvent or other "conditioning agent" is optionally applied to the strip. Then the strip is moved backward into the printer and positioned over at least one electrographic print head (40). The medium (10) is optionally moved back and forth and/or the print head (40) is optionally moved back and forth. This action accomplishes cleaning or lapping of the electrographic print head. After use, the strip, still affixed to the medium (10) is moved away from the printing area and printing resumes. The process is equally applicable in single-pass and multi-pass printers.

Abstract: A process for generating a visible image that involves forming an electrostatic latent image upon the surface of a charge receptor medium consisting of a thin dielectric layer adjacent the metallized surface of a non-conducting substrate. The latent image is then developed to form a visible image. The thin dielectric layer may be in the form of a thin plastic film which may be delaminated from the metallized layer after image development and then laminated to the face of graphics display media such as a pressure sensitive paper. Alternately, the dielectric layer may be delaminated from the metallized layer, inverted, and laminated back to the metallized layer so that the developed visible image is sandwiched between the metallized layer and the thin plastic film. The process produces a latent image receptor comprising a support base having a metallized layer and a dielectric layer for use in producing electrographic images.

Abstract: An image forming method and an image forming apparatus achieve a high developing speed and high transferring efficiency. The method forms a latent image on the surface of an image carrier that repels a coloring liquid, attaches an affinity agent (containing fine silica grains) that has affinity for the coloring liquid, onto the latent image with the electrostatic force, and attaches the coloring liquid onto the affinity agent on the latent image, to visualize the latent image. The method efficiently transfers the visualized image having the affinity agent to a recording medium, to provide a fixed image.

Abstract: A photoconductive layer is formed on the entire outer peripheral surface of a light transmissive drum, and a conductive layer is formed on the photoconductive layer and is made up of a plurality of strip-like conductive portions. Provided around the drum are a tank for storing thermo-melting ink, a blade which removes surplus ink on the outer peripheral surface of the drum, a drier for drying the ink filling the gaps between the conductive portions in the conductive layers, a platen roller which presses against the outer peripheral surface of the drum with a sheet of recording paper in between, and a light source which is provided inside the drum, facing the inner peripheral surface thereof. When the light source is selectively operated in accordance with image information, current is made to flow between the conductive portions in the conductive layer via the photoconductive layer at image recording areas, thus causing the ink filling the gap to be transferred to the recording paper.

Abstract: The invention provides an image forming apparatus for forming, on a image carrier, an electrostatic latent image corresponding to a document image, and then providing an image based on the electrostatic latent image formed on the image carrier, has first output device having a first output section for outputting a first signal corresponding to the temperature of the image carrier, a first unit having the first output device, second output device having a second output section for outputting a second signal with a level differing from the first signal, a second unit having the second output device, input device having a temperature signal input section which is to be connected to one of the first and second output sections for inputting a signal output from the one of the first and second output sections, and a detection device for detecting the one of the first and second output sections which is connected to the temperature signal input section, and also detecting the temperature of the image carrier.

Abstract: A voltage from a high voltage power source is applied between a toner support and an opposing electrode to generate an electric field between the two elements which permits the toner carried on the toner support to jump to the opposing electrode side. A control electrode is provided between the developer support and the opposing electrode to control the jumping of the toner. The control electrode is formed with annular electrodes around gates through which the toner passes through. Each annular electrode is supplied with a voltage for causing the toner to jump or for prohibiting the toner from jumping. In applying the voltage for causing the toner to jump to each annular electrode, the control power source starts to apply a voltage for prohibiting the toner from jumping, to annular electrode at a time when the jumping toner travel past the location of the control electrode. In this situation, the traveling toner continues to move toward the recording paper on the opposing electrode.

Abstract: Apparatus for information transfer and including a dielectric element having generally opposite first and second surfaces, an information bearing voltage pattern being associated with the first surface and an information bearing charge pattern being associated with the second surface, means for applying a flow of charges to the second surface, the flow of charges being operative to transfer information between the first and second surfaces.

Abstract: An electrographic printing apparatus for forming a toner image on a recording medium, includes: a) a magnetic brush having a rotatable magnetic core and a stationary outer cylindrical shell; b) an addressable array of transfer electrodes on the outer shell, the array including a plurality of parallel strips of high magnetic permeability, electrically conductive material arranged circumferentially around the shell and disposed under an electrically insulating layer, the insulating layer defining printing gaps over the strips; c) a receiver electrode arranged in spaced relation to the array of transfer electrodes to define a recording region through which a receiver can be moved; d) a developer supply for supplying developer powder having an electrically conductive, magnetic carrier and a first colored toner to the magnetic brush, and e) an electronic circuit adapted to selectively apply voltage pulses to the transfer electrodes to cause the toner to transfer from the developer powder to the receiver in an imag

Abstract: Electrographic printing apparatus for forming a toner image on a recording medium, includes: a magnetic brush having a rotatable magnetic core and a stationary outer shell; a developer supply for supplying a magnetic developer powder including toner to the magnetic brush. A print head on the outer shell forms a plurality of parallel lines of developer. Toner is selectively transferred from a plurality of electrodes within each line to a receiver. A receiver electrode is arranged in spaced relation to the print head to define a recording region through which the receiver can be moved.

Abstract: In an image forming apparatus, a toner carry roller, the upstream surface of an aperture electrode unit and the downstream surface of the aperture electrode unit are processed so that the surface roughness values thereof are equal to about 2 .mu.m, 0.2 .mu.m or less and about 6 .mu.m in terms of Rz, respectively. Accordingly, at the upstream side of the toner supply direction, the friction coefficient between the toner and the upstream surface is smaller than that between the toner and the toner carry roller surface so that subsequently-supplied toner pushes previously-supplied toner to the apertures of the aperture electrode unit. At the downstream side of the toner supply direction, the friction coefficient between the toner and the toner carry member is smaller than that between the toner and the downstream surface, the toner which is carried and supplied by the toner carry roller is fed to the apertures where it is dammed up by the toner adhering to the downstream surface.

Abstract: An electrostatic recording apparatus 1 for forming an electrostatic image on an electric charge carrying member 2 comprises a photoelectric transfer member 14 spaced from the electric charge carrying member 2, a floating electrode 16 provided on a first surface of the photoelectric transfer member 14, an electric power supply 27 for applying a voltage between the second surface of the photoelectric transfer member 14 and the second surface of the electric charge carrying member 2, and an exposure device 8 for exposing a second surface of the photoelectric transfer member 14. The floating electrode 16 having an electric discharge terminal 18a close to the electric charge carrying member 2.

Abstract: A coated xerographic photographic paper comprised of (1) a cellulosic substrate; (2) a first antistatic coating layer in contact with one surface of the substrate; (3) a second toner receiving coating on the top of the antistatic layer, and comprised of a mixture of a binder polymer, a toner spreading agent, a lightfastness inducing agent, a biocide, and a filler; and (4) a third traction controlling coating in contact with the back side of the substrate comprised of a mixture of a polymer with a glass transition temperature of from between about -50.degree. C. to about 50.degree. C., an antistatic agent, a lightfastness agent, a biocide and a pigment. The traction promoting third coating is also capable of receiving images from a xerographic copier/printer.

Abstract: A laser film printer system comprising:a source of a beam of light having a wavelength in the blue or ultraviolet region;a modulator for modulating the beam of light according to an input image signal;a monochrome film having a photosensitive layer which is sensitive to light in the blue or ultraviolet region; anda scanner for scanning the film with the beam of light to form an image therein representative of the input image signal;wherein the wavelength of the source of a beam of light and the grain size and coating density of the silver halide in the photosensitive layer of the monochrome film are chosen to eliminate interference fringes of said film image.

Abstract: An image forming apparatus includes a toner supporting roller, an aperture electrode assembly including one or more apertures and associated control electrodes, a controller and a back electrode roller. The toner supporting roller supplies charged toner particles to the underside of the apertures of the aperture electrode assembly. The controller selectively generates a potential difference between each of the control electrodes and the toner supporting roller. A coulomb force generated by the potential difference attracts the toner particles towards the apertures of the aperture electrode assembly. When no voltage is applied to the control electrodes in generating a blank line, no voltage or a reverse voltage is fed to the back electrode roller. Thus, undesired toner particles are not inadvertently transferred to a printing paper, such that blank image areas spattered with unintentionally transferred toner particles are minimized.

Abstract: An electrostatic recording apparatus 1 for forming an electrostatic image on an electric charge carrying member 2 includes a photoelectric transfer member 14, a pair of bias electrodes 12, 13, an electric power supply 17, a floating electrode 16 and an exposure means 8. The photoelectric transfer member 14 which generates carrier when being exposed to light is interposed between the bias electrodes 12, 13. One of the bias electrodes 12 is transparent. The electric power supply 17 applies a voltage between the bias electrodes 12, 13. The floating electrode 16 has a first area which comes into contact with the photoelectric transfer member 14 and a second area which is opposed to the electric charge carrying member 2. The floating electrode 16 is in no electrical connection with the bias electrodes 12, 13.

Abstract: An aperture electrode member includes an insulating sheet having a plurality of apertures and a control electrode provided for each of the apertures. The control electrodes are switched independently of one another and cause toner powder transported thereto from a toner supply apparatus to selectively pass through the apertures so as to form an image on an image recording medium. A member for fixing the aperture electrode member to the toner supply apparatus is secured at locations of the insulating sheet other than the location of the wiring lines for the control electrodes.

Abstract: A field controlled plasma discharge display element is disclosed for light source use in single element and multiple element plasma discharge electrostatic printers. The display element includes a pair of hollow discharge electric field electrodes, and a third electrode positioned external to and aligned with the discharge electric field electrodes for generating a control electric field proximate to the discharge electric field. The control electric field is used to control the intensity of the plasma discharge by distorting the shape of the generated discharge electric field. The single element plasma discharge device is modulated in accordance with the image to be printed and the modulated output is scanned across the photoconductive surface to produce the latent image.

Abstract: In a print head for a powder jet image forming apparatus according to the present invention, a grid electrode is provided between first electrodes and a developer supply roller in parallel with major surfaces of an insulating layer, and therefore, a distance between any of the first electrodes and the grid electrode is kept fixed. Thus, applying a given level of voltage to the grid electrode allows an electric field for supplying developer to the first electrodes to arise uniformly. This is effective in avoiding uneven density in the resultant image.

Abstract: A band printer having a transport mechanism, an endless photoreceptive image carrying ribbon, a latent toner imaging apparatus, a transfer mechanism, and a fixing mechanism is disclosed. The transport mechanism defines a printing medium path extending in a first direction and transports a printing medium along the printing medium path. The endless photoreceptive image carrying ribbon circulates adjacent the printing medium path in a second direction at an angle to the first direction, and the latent toner imaging apparatus is adjacent to and stationary with respect to the circulating ribbon. The imaging apparatus forms an electrostatic latent toner image on the surface of the ribbon according to received image data as the ribbon moves past the imaging apparatus, and the transfer mechanism transfers the formed toner image to the printing medium when the formed toner image is aligned with the printing medium. Thereafter, the fixing mechanism fixes the image to the printing medium.

Abstract: An electrophotography recording method is adapted to a recording apparatus having a carriage which includes processing means for forming a latent image on an image bearing member that is rotatable about an axis parallel to a transport direction of a recording sheet by charging the image bearing member and for developing the latent image, where the carriage is successively moved for each 1 line region having a width corresponding to a width of the image bearing member in a main scanning direction which is perpendicular to the transport direction of the recording sheet so that a developed image on the image bearing member is transferred and thermally fixed on the recording sheet.

Abstract: Image forming apparatus having a photosensitive drum 1, a charger 2 for uniformly charging the photosensitive drum 1, an exposing means 3 for forming an electro-static latent image on the photosensitive drum 1, an exposing unit 4 for forming a visual image by developing the electro-static latent image, a transfer roller for transferring the visual image to a printing medium 10, which comprises a transfer voltage supply circuit that supplies the transfer roller 5 one or more times with voltage in one polar direction and successively in the other polar direction during an interval after starting of operation of the image forming apparatus and before the time when the printing medium 10 is transported to the transfer roller 5.

Abstract: A toner projection printer is provided with a developer surface which manifests a developer bias, and includes a cloud of entrained toner particles. A conductive platen is positioned opposed to the developer surface and manifests a platen voltage that is attractive to the toner particles. An address plate is positioned between the developer surface and the conductive platen. The address plate includes a determined thickness insulator with through pixel apertures. Each pixel aperture has at least a first and second conductors that are electrically insulated from each other by the insulator. A first drive circuit is coupled to the first conductor for controllably applying a row drive voltage which is either a reference potential that exerts a repulsive force on the toner particles or a high voltage which is attractive to the toner particles.

Abstract: A carriage is constructed such that a processing part and a fixing part are fitted to a sliding part, wherein a frame on which an exposer and a process motor are mounted is rotatably fitted to the sliding part, and a housing which accommodates the fixing part and the processing part not including the exposer is rotatably and detachably fitted to the frame.

Abstract: After a plurality of parallax images either obtained from an external camera or generated by a computer are divided into a plurality of image strips, respectively, a combined image is formed from the plurality of image strips, and recorded on a photo sensing drum as a latent image. Next, the latent image is transferred or printed on backside of a lenticular sheet, made from a transparent plastic, with toner or ink, thereby forming a stereoscopic image display medium. Accordingly, a high definition stereoscopic image of good contrast can be printed out at high speed by using a printer having a simple configuration.

Abstract: To create a latent electrostatic gray scale image on a charge receptor, a gray scale generator determines a charge distribution for a unit cell having at least two pixels. A charge manager then determines the amount of charge to be placed in each pixel. More specifically, the charge amount for a first ON pixel in the unit cell is assigned a relative full charge amount. The charge amount in each succeeding ON pixel is determined such as to ensure faithful reproduction of gray scale for any given ratio of pixel size to charge receptor thickness. To increase the developability in proportion to the gray scale, the charge manager manages the charge amount of succeeding ON pixels to be a smaller amount than the first ON pixel.

Abstract: A moving body moves in reciprocation in directions perpendicular to a feeding direction of a chart. An image carrier is mounted on the moving body and rotates in synchronism with a movement of the moving body. A charging unit is mounted on the moving body and changes the image carrier. A developing unit is mounted on the moving body and develops an electrostatic latent image formed by irradiating the image carrier charged by the charging unit with the light. A voltage dividing unit moving in synchronism with the moving body divides a predetermined voltage and supplies the divided voltages to at least the charging unit and the developing unit. An electric charge supplying unit may be used to supply electric charges to a holding unit for holding the electric charges under various conditions of the moving body.

Abstract: A method and device to enhance the printing quality of direct electrostatic printers which utilize an electrode array and electrical signals to generate an electrical field to cause toner particles to be deposited directly onto plain paper to form visible images. The invention relates to an improvement to dynamically position and maintain a desired distance between the electrode array and the surface of the charged particles on the particle carrier.

Abstract: An image recording apparatus having aperture electrode body formed with a plurality of apertures through which toners pass to deposit onto an image receiving member. The aperture electrode body includes an insulative substrate having the apertures and control electrodes formed over the insulative substrate and each surrounding each aperture. The aperture electrode body has a nature of bending due to difference in thermal expansion coefficient of the insulative substrate and the control electrodes. To provide uniform bending, dummy electrodes are formed over the insulative substrate. The dummy electrodes includes a first set of dummy electrodes positioned at upstream side of the control electrodes with respect to a running direction of the image receiving member. The dummy electrode also includes a second set of dummy electrodes positioned beside the extreme end of the control electrode in the array direction of the apertures.

Abstract: An electrostatic recording head comprises an insulating substrate having a builtup structure thereon. The builtup structure includes, in the following order, a plurality of dielectric electrode strips having portions which are arranged in parallel to and kept away from one another, a first insulating layer, a plurality of discharge electrode strips each extending to intersect with the respective portions of the dielectric electrode strips, a second insulating layer having a plurality of openings to form part of an ion generating space region at individual intersected portions of said discharge electrode strips and said dielectric electrode strips, and a screen electrode which is provided to complete each ion generating space region in association with the second insulating layer and has a plurality of openings, through which ions are passed, corresponding to the respective ion generating space regions.

Abstract: A process and apparatus for printing with a press at least one image by transfer of an electrostatic colorant vehicle between an intermediate transfer element and a printing carrier, including the steps of making the intermediate transfer element in the press by magnetically developing zones on a substrate, depositing a magnetic, insulating, and hardenable material on the substrate to constitute the zones, hardening the hardenable material, subjecting the hardenable material to an electrostatic charge in order to lend the zones an affinity for the colorant vehicle, and transferring the colorant vehicle to the printing carrier by directly contacting the intermediate transfer element to the printing carrier.

Abstract: Capacitors 32 connected to their corresponding matrix-shaped picture elements 33 are connected to an image forming unit 20 on which an electrostatic latent image is formed. Switching elements 31 are also connected to the image forming unit 20. When the switching elements 31 are made conductive, their corresponding capacitors 32 are charged from a power source arranged outside, and a potential appears in each of their corresponding picture elements 33. Therefore, the electrostatic latent image can be more stably formed on these matrix-shaped picture elements over a time period which is determined by time constant. AS the result, electrostatic latent image formation can be achieved without using any ozone-generating pre-charger. In addition, the electrostatic latent image forming unit can keep its toner holding force even after the developing process to enable an image to be more reliably and clearly reproduced.

Abstract: The electrostatic information recording medium of the invention has on at least an electrode an information recording layer comprising a product obtained by contact of a polymer having a fluorine-containing aliphatic ring structure with fluorine gas, on which layer a latent image charge trap is retained. This electrostatic information recording medium enables electrostatic information such as an electrostatic latent image to be recorded in the form of a charge trap rather than an electrostatic charge, and so may be used as an electrostatic printing master by way of example.

Abstract: An electrostatic image-bearing dielectric member comprises a support and a dielectric layer formed on the support. The dielectric layer is formed of at least one of amorphous carbon, diamond-like carbon and diamond. The dielectric layer may contain not larger than 60 atomic percent of at least one of hydrogen and fluorine. An intermediate layer may be provided between the support and the dielectric layer in order to improve the adhesion therebetween.

Abstract: A method and apparatus for conserving a substance dispensed by a printer engine for forming print on a media. As an example, the method stores a plurality of bits in a memory, the plurality of bits representing a cumulative pattern to be printed by reproducing the bits on the media. Each bit is either in a first memory state or a second memory state. The method further selects a subset of the plurality of bits, wherein the subset forms a first pattern and has a center bit. If each of the plurality of bits of the subset is in the first memory state, the method outputs to the printer engine a print bit corresponding to the center bit and in a print state which is opposite the memory state of the center bit. If, however, at least one of the plurality of bits of the subset is in the second memory state, the method outputs to the printer engine a print bit corresponding to the center bit and in a print state the same as the memory state of the center bit.

Abstract: An information recording and/or reproducing apparatus for recording and/or reproducing information to/from a recording medium in a scanning probe microscope comprises a circuit to reproduce recording bits formed on the recording medium on the basis of a physical amount such as tunnel current, interatomic force, electrostatic force, or magnetic force which occurs between the probe and the recording medium, a sensor to detect a state such as film thickness or film quality of the recording medium on the basis of the physical amount before the recording bits are reproduced, and a correcting circuit to correct reproducing conditions such as a magnitude of a voltage which is applied between the probe and the medium on the basis of the detected state of the medium.

Abstract: An image forming apparatus for performing a recording operation with respect to a recording medium, includes an image forming device for forming an image on a recording medium, a recording medium receiver for receiving the recording medium on which the image is formed, and a laser beam emitter, arranged below the recording medium receiver, for emitting a laser beam in accordance with image information so as to cause the image forming device to form an image. The laser beam emitter is arranged below the recording medium receiver to emit a laser beam obliquely upward.

Abstract: An electrostatic image forming apparatus 1 comprises a sensitized drum 2 covered with a single, organic, photosensitive layer (OPC). This sensitized drum 2 is rotatable at a predetermined speed. A charging device 5 is disposed around the drum 2 for uniformly charging a surface of the OPC. A latent image forming device 6 is disposed downstream of the charging device 5 around the drum 2 for forming a latent image on the OPC. A developed image forming device 7 is disposed downstream of the latent image forming device 6 around the drum 2 for forming a developed image from the latent image. A distance from the charging device 5 to the latent image forming device 6 is defined with respect to a distance from the charging device 5 to the developed image forming device 7 by the following expression;T1.ltoreq.T2-0.5 log T2-0.

Abstract: A conveying unit conveys a recording sheet in a sheet conveying direction. A carriage includes a processing unit including an image carrier which is rotated about a rotational axis parallel to the sheet conveying direction. The processing unit forms a latent image on the image carrier by electrically charging and developing the latent image so as to produce a developed image. A transfer unit transfers the developed image on the image carrier to the recording sheet as a result of inserting the recording paper between the image carrier and said transfer unit as the carriage moves on the recording sheet in a carriage moving direction. A fixing unit fixes the developed image onto the recording sheet, and a supporting member rotatably supports the processing unit and the fixing unit. A moving unit moves the carriage in the carriage moving direction which is perpendicular to the sheet conveying direction.

Abstract: The present invention is a an apparatus for enhancing the output along edges of charged area developed regions in a tri-level imaging system employing a pulse width and position modulated signal ROS for exposure. The invention enables the identification and selective alteration of video data used to drive the ROS so as to extend the developed regions by a selected amount and eliminate digitization artifacts present in the image to be printed. The extension of the charged area developed regions is accomplished by reducing or trimming the width of the exposure pulses in adjacent areas to enable development within a portion of those regions.

Abstract: The present invention relates to an electrophotographic technique for enhancing the quality of a reproduced image of character information and image information having an intermediate gradient.A latent image forming means provides a plurality of preset .gamma.-features and a plurality of sharpness features forsetting a resolving power of an image to be formed which can be selected optionally, and, in the latent image forming means, when a particular sharpness feature is set in response to a .gamma.-feature selected from the aforementioned .gamma.-features. In the reproduction of character image information, a .gamma.-feature for enabling the image reproduction to enhance the edge effect is selected, thereby emphasizing the sharpness feature. Whereas, in the reproduction of the image information to reproduce an intermediate gradient, a .gamma.-feature for enabling the reproduction of the intermediate gradient is selected, thereby weakening the sharpness feature.

Abstract: In an image forming apparatus, an aperture electrode member, a toner supply device, a fixing device, a main power source and a main base plate are mounted to a main body case while a back electrode roller is disposed on a lid member. When the lid member is closed, the aperture electrode member and the back electrode roller are kept at a 1 mm gap interval. On the other hand, when the lid member is opened, the aperture electrode member and the back electrode roller are completely separated from each other, so that the aperture electrode member can be easily cleaned.

Abstract: The improved color image forming apparatus is adapted for image formation from either a reflection-type original or a transmission-type original by the user who selects the proper exposure optics (or unit) in accordance with the kind and size of the original to be duplicated. The apparatus is capable of image formation with the necessary color and/or density related adjustments being performed by basically the same operating device through basically the same operation without any regard to the kind and size of the original and the desired image of high quality can be formed by a simple method. The color and/or density related adjustment necessary for image formation with the selected exposure optics (or unit) is performed by the same input device without regard to the kind of document to be duplicated.

Abstract: An image forming apparatus includes an image carrier, a means for forming colorant holding regions on the image carrier, the colorant holding regions having better ink or developing agent holding properties than the image carrier, a means for supplying a colorant to the colorant holding regions, and a means for transferring the colorant, held in the colorant holding regions, onto a printing medium.