Abstract: An apparatus in which the concentration of toner particles used to form a highlight color document is controlled. The percentage of the document arranged to have highlight color portions thereon is determined and a first signal corresponding thereto generated. A second signal corresponding to the rate of toner particle usage per document is transmitted. A third signal corresponding to the total number of documents being reproduced is produced. The first, second and third signals are multiplied to generate a control signal corresponding to the required dispense rate for the toner particles forming the highlight color portions of the document.

Abstract: A document illuminating apparatus includes a reflecting plate which reflects the light from a rod-shaped illuminating lamp before it is incident on a document disposed on a document table. The reflecting area of the reflecting plate is varied in the longitudinal direction thereof in such a manner that the side of the reflecting plate on which the distance between the document and an optical path changing mirror is relatively great has a larger reflecting area than that of the side of the reflecting plate on which said distance is relatively short. Accordingly, the illuminance of the reflected light from the document which is incident on the optical path changing mirror is made uniform along the longitudinal axis of the illuminating lamp.

Abstract: The invention provides an improvement in operability in handling sheets such as originals or recording paper. A sheet exhaust receptacle of the invention inverts a sheet exhausted from a convey device in a direction opposite to the exhaust direction and guides the leading end of the sheet to an insertion side of the convey device. Handling of exhausted sheets is easy and the overall apparatus can be rendered compact in size.

Abstract: Mechanism for effecting pressure engagement between two roll fuser members used for fusing toner images to copy substrates. The mechanism is characterized by simplicity of design and serviceability. To this end, one of two roll fuser members is supported on bearing surfaces such that it is lifted or raised upwardly through engagement with the other fuser member as it is moved upwardly. Upward movement of the last mentioned roll is effected by pair of lever arms which serve as the support for that roll. Each lever arm is operatively attached to an overcenter toggle structure which is actuatable either by rotary or linear motion of an actuator mechanism.An adjustment device is provided for varying the load applied to the rolls.

Abstract: An image processing apparatus which has a function of simultaneously or selectively copy an image displayed on a display screen and an image on an original at an arbitrary location is disclosed. This apparatus includes a display unit which can be used as an original and be simultaneously used with the original and further can display at an arbitrary location on a placing unit for placing the original.

Abstract: An image forming apparatus comprises four developing units for developing an electrostatic latent image formed on a photosensitive drum, and a revolving unit for revolving the developing units in parallel relation and selecting one of the developing units for use by stopping to revolve the developing units at a predetermined position. The four developing units are stored individually with developing agents of different types. The revolving unit is supported by a rockable suspension member at a distance from the center of rocking of the member, and can swing toward and away from the drum. The revolving unit is moved toward and away from the drum by a shifting mechanism. A locating member is attached to each developing unit, while a locating pin is provided on a housing of the apparatus. When the revolving unit is brought close to the drum by the shifting mechanism, the relative positions of the drum and the developing unit selected by the revolving unit are determined.

Abstract: In an electrophotographic copier, adjustments are made to synchronize copy sheet gating optics start of scan, and document conveyor registration. The adjustment to the copy sheet gating is effected by making a copy with the optics assembly inactivated, determining the length of undeveloped area adjacent to the leading or trailing edge of the copy, and adjusting the start of scan as a function of the determined length. The start of scan of the optics assembly is effected by positioning a test master document with dark portions adjacent to its leading and trailing edges, making a copy of the test master document, determining the length of undeveloped area adjacent to the leading or trailing edge of the copy, and adjusting the start of scan as a function of the determined length.

Abstract: An electrostatic copying apparatus which can form an image on both surfaces of a copying paper as required. The apparatus includes a copying paper conveying passage, a copying paper feeding means for feeding a copying paper sheet to the paper conveying passage, a conveyance controlling means disposed adjacent to the downstream end of the paper conveying passage, a copying paper discharging passage extending from its upstream end adjacent to the downstream end of the conveyance controlling means, a copying paper reversing passage extending from its upstream end adjacent to the downstream end of the conveyance controlling means, a copying paper returning passage extending from its upstream end adjacent to the upstream end of the conveyance controlling means, a copying paper re-feeding passage, and a copying paper re-sending means for re-sending a copying paper returned through the paper returning passage to the paper conveying passage through the paper re-feeding passage.

Abstract: The present invention provides an apparatus for forming images on a substrate, using a belt-like medium which is moved past a number of precessing stations. The apparatus has at least two sections in which the belt-like medium can be driven at different speeds by different drive rollers at the same time. A buffer unit between the two sections compensates for the belt length shortage and/or surplus arising from the speed difference. The buffer unit consists of two parallel freely rotatable rollers secured to the ends of a rotatable frame.

Abstract: A color copying machine includes scanning device for applying illumination onto a color original to effect a scanning operation. A color separator includes a plurality of optical filters of different colors, each of the filters allowing a predetermined light component of the illumination to pass therethrough during each scanning operation so as to apply it onto a photoconductive drum charged uniformly to form an electrostatic image thereon. Color toner is applied to each of the electrostatic images during the rotation of the photoconductive drum. The toner image on the photoconductive drum is transferred to a record sheet on a transfer drum. Two sensors are provided for sensing the initiation of each scanning operation and the position of the record sheet on the transfer drum. A control circuit detects, in response to the outputs of the two sensors, start and end timings of the transferring of each of the toner images onto the record sheet.

Abstract: A shell-type electrostatic copying apparatus comprising a supporting structure consisting of a lower supporting frame and an upper supporting frame mounted on the lower supporting frame for free pivoting between an open position and a closed position about a first pivot axis as a center, an endless carrier member having a photosensitive material disposed on its peripheral surface, a developing device for developing a latent electrostatic image formed on the surface of the photosensitive material and a copying paper conveying mechanism.

Abstract: The disclosure describes a circuit to avoid overloading a computer-generated image system with limited capacity for processing image data in real time. A circuit that is constructed and arranged according to this description avoids such overloads by varying the resolution of the image in real time under the control of a real-time control computer.

Abstract: An image forming apparatus selectively operable in either a first mode for obtaining a photocopy of an original or a second mode for recording information signals. The apparatus includes a developing device for developing an electrostatic latent image formed on an electrophotographic type photosensitive member, and the characteristic of the developing device can be changed in accordance with the selected mode.

Abstract: A graphics display is cleared by apparatus forcing binary ZERO's into all locations of the bit map memories between successive vertical synchronization operations during a write refresh operation.

Abstract: In an improved image projector with liquid crystal light shutter, a layer of ferroelectric liquid crystals contained in a liquid crystal light shutter at which the light modulated linearly in accordance with image signals is produced is of the thickness of less than a helical pitch of molecules of the liquid crystals whereby a response time becomes as fast as, for instance, 0.18 ms and the time sharing operation can be performed in the liquid crystal light shutter.

Abstract: The present invention solves the problem arising when a photosensitive medium and some or all of means for forming a latent image on the photosensitive medium are made into a unit which is removably mountable with respect to the body of an apparatus. This problem is attributable to the fact that the characteristic of the photosensitive medium is not constant, and lies in that the completed electrostatic latent image differs from one photosensitive medium to another. The present invention solves this problem by providing an adjusting function to the means of such unit itself used to form a latent image.

Abstract: An image forming apparatus with an operation panel control function, the apparatus has a housing including an original scanning section for optically scanning an original placed on an original table so as to obtain optical image data, an image forming section for transferring the optical image data obtained by the original scanning section onto an image forming medium, an operation panel arranged on the housing and having an operation section for supplying various operation instructions to the original scanning section and the image forming section included in the housing, an operation data supply section which is detachably mounted on the operation panel, stores operation data associated with the various operation instructions, and has a data recording medium from which the storage data can be read out as desired, a display section which is arranged on the operation panel and can display at least the operation data written in the data recording medium of the operation data supply section, and a control secti

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: A multifunctional copying machine which has a copier function and/or a laser printer function has a copying unit for forming on the surface of a photosensitive body an electrostatic latent image corresponding to an image on a document placed on a document table, developing the latent image, and transferring the developed image onto a transfer sheet, and further has a laser scanning unit for producing a laser beam for scanning the surface of the photosensitive body. The laser scanning unit is detachably attached to the exterior of the copying unit, and the laser beam is guided through a space below the document table.

Abstract: A developing apparatus in electrophotographic copying machines comprising a developing sleeve which maintains developer on its surface and which transports said developer to the region of an electrostatic latent image on a photosensitive body; a doctor blade which regulates the amount of developer on said developing sleeve; a developing housing which contains therein said developing sleeve and said blade and which supports on its side walls both ends of the revolving axis of said developing sleeve; and a supporting section which supports directly or indirectly both ends of said blade at a fixed position on the side walls of said housing at a fixed distance from the surface of said developing sleeve.