Abstract: A single-layer binder comprising a synthetic resin binder and a phthalocyanine pigment dispersed therein is modified so as to reduce the content of the phthalocyanine pigment while maintaining or further improving the sensitivity of the binder. A coating material comprising a synthetic resin binder comprising as a constituent component a polyester resin containing halogen atoms, e.g., chlorine or bromine, and a phthalocyanine pigment dispersed in the binder is applied to a conductive base to produce an electrophotographic binder.

Abstract: An apparatus for supplementing a toner into a toner hopper of a developing device using the toner including a toner supplementing container having a toner bottle having an opening, a shutter member movable between a close position in which the opening of the toner bottle is closed by the shutter member and an open position in which the opening of the toner bottle is not closed by the shutter member, and a shutter locking member for locking the shutter member into the close position; and a container fixing and locking mechanism arranged on the toner hopper and having a fixing member for fixing the toner supplementing container onto the toner hopper and a locking member which is movable into a locked position in which the shutter locking member is released to allow the movement of the shutter member into the open position and the toner supplementing container could not be removed from the toner hopper and an unlocked position in which the toner supplementing container can be removed from the toner hopper and th

Abstract: A magnetic brush developing device for use in a copying machine or a printing device includes a developing roller forming a magnetic brush, a developer housing, a developer tank outside the developer housing, a scraper for removing developer from the developing roller after it passes through the developing area on the developing roller, a first carrying device in the developer housing arranged opposite to the developing roller along its entire length for carrying the developer from one end to the other end of the developing roller, for supplying developer to the developing roller during the carrying operation, and for discharging the excess developer into a developer tank, a second carrying device in the developer housing arranged parallel to the first carrying device and communicating at one end of the first carrying device for carrying the developer received from the developer tank in a direction opposite to the carrying direction of the first carrying device, for recovering the developer scraped from the d

Abstract: A transferring device for transferring on a record paper a toner image formed onto an image forming member is disclosed. The transferring device comprises a transfer belt with a dielectric layer formed on a conduction belt member; a driving device for running the transfer belt; a transfer roller for contacting the transfer belt to an image forming member with pressure; a corona charges arranged at a position opposite to the transfer belt for charging the transfer belt with a charge having a polarity opposite to the charging polarity of the toner; a grid electrode arranged between the corona charger and the transfer belt; a plurality of bias sources connected to the grid electrode for biassing the grid electrode at respective potentials; and a change-over circuit for changing over the connection between the grid electrode and the bias source, whereby the grid potentials are selectively changed over in accordance with the characteristics of a record paper to be used.

Abstract: A control circuit for heat fixing device for use in an image forming apparatus is disclosed. The control circuit comprises device for detecting a power source voltage, device for detecting zero-crossing points of the power source voltage, device for determining frequency of the source voltage from the detected zero-crossing points, device for determining a power supplying time based on the detected power supply voltage and the power source frequency, device for controlling the power supply to a load based on the determined power supply line, in such a manner that a given power is automatically applied to the load against the change or fluctuation of the power supply source.

Abstract: A belt transferring device for transferring on a record paper a toner image formed onto an image forming member is disclosed.

Abstract: An electrographic printing apparatus includes a housing, a source of paper, an output receptacle for receiving the paper after it is imprinted, a photoconductive member for storing a latent electrostatic image, a developer unit for developing the latent electrostatic image, and a charged transfer belt disposed opposite the photoconductive member. The charged transfer belt serves to transfer the developed image from the photoconductive member to the paper, and to transport the paper after it is imprinted to a fusing station. The paper path is located near the top of the housing for easy access in case of a paper jam. The paper path includes a sharp separation angle from the photoconductive member in order to decrease the dwell time of the paper against the photoconductive member. Desirably, the photoconductive member comprises a photosensitive drum of relatively small diameter, for example, on the order of 30-80 mm in diameter.

Abstract: A cleaning device for removing residual developer particles from a photoconductive element, such as a photoconductive belt, comprises a cleaning sleeve having a length substantially equal to the width of the photoconductive element. The cleaning sleeve includes a thin screen portion having apertures therein. The screen portion is maintained in contact with the photoconductive element. A biasing voltage is applied to the cleaning sleeve. Developer particles pass through the apertures in the screen portion. An auger is located in the interior of the cleaning sleeve. The auger transports the collected developer particles out of the cleaning sleeve where the particles may be either recycled or discarded.

Abstract: An electrographic printing apparatus capable of duplex printing comprises a housing, a source of copy material and an output tray for receiving such copy material after it is imprinted, and a photoconductive member for storing a latent electrostatic image of the information to be imprinted. The printer/copier has first and second paper paths located near the top of the housing so that access to the paper may be achieved from the top of the housing. A photoconductive member is located below the first paper path and comes into contact with a first side of the paper from below in a transfer zone located in the first paper path to imprint the first side of the paper. The second paper path is operative to receive paper after it has passed through the transfer zone and information has been transferred to the first side of the paper.

Abstract: An electrographic printing apparatus is capable of functioning as a copier, printer, and telefax machine, and is also capable of duplex printing. The electrographic printing apparatus includes a photoconductive member in the form of a disposable cassette which is mounted at an angle in the housing. The apparatus include an optical print head which can receive information from a local or remote source to form an electrostatic latent image on the photoconductive member and thus act as a printer. The apparatus also includes a device for scanning and digitizing an original document. When the digitized image is transmitted to the optical print head, a copy of the original document is produced. When the digitized image is transmitted over the telephone lines to a remote receiver, the apparatus functions as a telefax machine.

Abstract: A cleaning apparatus for removing residual toner from a rotatable charge image retentive member, such as a photoconductive belt or drum, consists of an elastic cleaning blade on an elastic support. The elastic cleaning blade includes a resilient leg and an elastically deformable cleaning edge which projects outward from the leg and toward the image retentive member. The elastic cleaning blade is supported at a downstream position relative to the rotational direction of the image retentive member. The resilient leg is caused to curve away from the image retentive member while maintaining the cleaning edge in contact with the image retentive member as it rotates.

Abstract: A cleaner unit is disclosed with a rubbery elastic cleaning blade. The blade extends horizontally from an upright base member, where the cleaning edge contacts a vertically downward passing photoconductive surface such that toner scraped from the surface travels over the upper face of the blade without causing a toner cloud. The removed toner is guided over this upper surface of the cleaning blade through the use of seals along the cleaning blade edge and outside the image carrying area of the photoconductive surface, as well as through the use of toner guiding grooves between the end seals.

Abstract: An electrographic printing apparatus capable of duplex printing comprises a housing, a source of copy material and an output tray for receiving such copy material after it is imprinted, and a photoconductive member for storing a latent electrostatic image of the information to be imprinted. The printer/copier has first and second paper paths located near the top of the housing so that access to the paper may be achieved from the top of the housing. A photoconductive member is located below the first paper path and comes into contact with a first side of the paper from below in a transfer zone located in the first paper path to imprint the first side of the paper. The second paper path is operative to receive paper after it has passed through the transfer zone and information has been transferred to the first side of the paper.

Abstract: An electrographic printing apparatus comprises a photoconductive member surrounded by a charging unit, an optical print head, a developing unit, a transfer unit, a cleaning unit, and an erasing unit arranged in sequence about the photoconductive member. Paper travels along a planar path across the top of the photoconductive member and the developed image is transferred to the underside of the paper. In a preferred embodiment, the photoconductive member comprises a vertically mounted photoconductive belt. By providing a separate and independent cleaning unit, the electrographic printing apparatus is capable of producing one sheet of copy material per revolution of the belt.

Abstract: An electrographic printer/copier includes a paper path which is easily accessed from the top of the machine and permits copies to be collated automatically. The machine includes a paper tray which adjusts to organize successive pages into related reports.

Abstract: Disclosed herein is a character generating device of a raster scan system which comprises a region data storage means for storing display region data predetermined with respect to each of the character codes and a region counter which is set by the display region data. The region data storage means and the region counter are correlated with each other, whereby the dot output is counted by the region counter for generating a signal to output the next character when the count value reaches a set region datum value.

Abstract: A data processing system wherein one of a number of central processing units writes a command for data transfer to it from a second processor over a data bus to a common memory and a digital code to an interrupt table, the code indicating interruption of the second processor. Decoding apparatus responsive to the digital code causes the second central processor to read the command for data transfer from the memory and transfer data to the first central processor.

Abstract: An image information output apparatus which includes a circuit for setting conditions for a "0" or a "1" level in an X direction, a circuit for setting conditions for a "0" or a "1" level in a Y direction with respect to each of respective image units over an entire output image plane divided into an X-Y matrix configuration, a circuit for generating an output timing signal for each of the image units, an AND circuit for ANDing two signals so as to output conditional signals at every generation of the output timing signal for each of the image units, one conditional signal being related to the X direction condition setting and one conditional signal related to the Y direction condition setting, a circuit for storing image information, and a circuit for outputting the stored image information, one image unit by one image unit, for each "1" level output signal of the AND circuit.

Abstract: An improved image reading apparatus which is so arranged that, by providing marks shaded to a predetermined density or darkness for setting a required reading area on an image reading surface, the start mark and end mark are detected by a solid state image sensor for supplying image signals within the required reading range into memory unit based on results of the on detection so as to reduce the memory capacity of the memory unit.

Abstract: An ink jet recording apparatus which effects nonimpact recording by the application of a jet of ink to a recording medium while the amount of ink to be jetted towards the recording medium is controlled to render it proportional to the recording velocity. For this purpose, the ink jet recording apparatus is provided with a feed-back loop system through which an electrical signal indicative of the pressure acting on the ink within an ink tank is fed back to a comparator to control operation of a compressed air source from which the pressure is applied to compensate for reduction in static pressure of the ink within the ink tank resulting from consumption of the ink. For maintaining the amount of the ink jetted proportional to the recording velocity, various arrangements are disclosed.