Abstract: A system for automatic operation of rapid transit vehicles in a railway yard. The vehicles have a receiver system which is responsive to information communicated thereto and a control system responsive to the receiver system for controlling the continued operation of vehicle. The invention includes: a first entry/exit track circuit having at least one transmitting system for transmitting vehicle control information to vehicles within its section of the first entry/exit track circuit, and at least one switching system for reversing the first entry/exit track circuit; a second entry/exit track circuit having at least one transmitting system for transmitting vehicle control information to vehicles within its section of the second entry/exit track circuit, and at least one switching system for reversing the second entry/exit track circuit.

Abstract: An antilock control device has a calculating unit for calculating the vehicle speed from the wheel speed signals from wheel speed sensors, a processing/lock state detecting unit adapted to judge whether the wheels are showing a locking tendency or recovering from locked state on the basis of the signals from the wheel speed sensors and the calculating unit and produce a command to reduce or increase the braking pressure on the basis of the result of judgement, and a brake fluid pressure circuit operable in response to the pressure control command from the lock state detecting unit.

Abstract: A fixing device for electrophotography has a heating roller and a compression roller compressed against each other. Copy paper with toner image on its surface is passed inbetween to have the image fixed. The heating roller is hollow and contains a heater inside. To control the heat output of the heater, a temperature detector is positioned on the surface of the heating roller near the edge of the paper passing between the rollers where no toner image is formed. The wall thickness of the heating roller is reduced to about 0.8-1.5 mm for improved heat distribution characteristics.

Abstract: An electrostatographic printing apparatus has a main frame and a unit including an imaging member, the unit being removably mounted to the main frame at a predetermined position for cooperative association with the main frame in producing prints, the unit includes detectable element, and the main frame includes a detector for detecting the detectable element when the unit is in its predetermined position and provides an indication when the detector does not detect the detectable element.

Abstract: A second chamber containing a developer and a first chamber within which a developing roller for applying the developer to an image bearing member is arranged are partitioned by a flexible film. The second chamber includes a developer conveying member by which the developer is conveyed into the first chamber through an opening formed in the flexible film. The opening is formed by tearing the flexible film by means of a tear tape.

Abstract: In a document copier/printer wherein copy sheet is of a length which exceeds the distance between a transfer station and a fusing station, a velocity differential is established between the two stations so that the copy sheet forms a buckle therebetween which varies from an initial position, and in a predetermined direction, during operation. A sensor detects when the buckle reaches a predetermined configuration and sends a signal to one of the two stations to change the media speed at that location for a length of time sufficient to restore the buckle to the original configuration. The cycle may be repeated several times during a process run.

Abstract: An image duplicating apparatus having an edited mode of copying operation in which an edited copy of a given image is to be produced, wherein editing data indicative of any desired conditions of operation in which the edited mode of copying operation is to be executed for a desired edited copy area may be entered by the operator in any desired manner after area data indicative of the desired edited copy area in which images are to be reproduced in the edited mode of copying operation has been entered under the edited mode of copying operation.

Abstract: An automatic document feeder provided on a copying machine, includes a document feeding unit, a transporting unit for transporting documents to a specified position on a platen and discharging the document therefrom, a pair of pinch rollers for registering the leading edge or trailing edge of the document, and a discharge roller for discharging the documents onto a tray. As the trailing edge of a first document has been registered by the pinch rollers, a second document is fed and the leading edge thereof is registered by the pinch rollers. The document in a pair serially aligned by the pinch rollers, are serially placed at the specified position on the platen. Further, the documents are discharged from the platen with a proper interval so that the leading edge of the second document does not push the trailing edge of the first document.

Abstract: An image forming apparatus including a developing unit for developing an electrostatic latent image formed on an image carrier, and an image forming unit. A mechanism is provided which permits the image forming unit and developing unit to be mounted on or dismounted from the image forming apparatus in the proper order. A developing unit-positioning guide is provided by first mounting the image forming unit on the image forming apparatus.

Abstract: An electrophotographic copying machine of a type having a drum for supporting a document to be copied therearound and being provided with an automatic document feeder adapted to carry out a preliminary copying operation for testing includes a timer for counting up a predetermined period of time after the completion of preliminary copying, or is alternatively so programmed that a choice can be made after a preliminary copying operation whether a document remaining in the copying position should be ejected. Jamming of documents and injury to the copying machine can be avoided effectively thereby.

Abstract: A developer carrier is used in a dry-type image developing device employing a one-component developer in an electrophotographic copier or an electrostatic recording apparatus. The developer carrier has a resin coating layer including an electrically conductive filler dispersed therein which is made of a material having a volume resistivity of at most 100 .OMEGA.cm. With this arrangement, the range in which the resistance of the surface layer varies under the ambient condition of varying temperature and humidity is small, producing a copy of stable image quality free from a smeared or contaminated background.

Abstract: An image forming device such as a copying machine provides a linearly polarized beam of light to be made incident on a document to be scanned which is placed on a document table. A transparent cover with a polarization filter attached to it covers the document such that the user can ascertain, without too much light entering his eyes, whether the document is placed at a correct position on the table.

Abstract: A copy paper separator is disposed opposite to a surface of a photosensitive body in an electrophotographic copying machine. A transfer charger for transferring images to copy paper and a separation charger for helping the paper to separate from the photosensitive body are adjacent to each other. A sheet made of a narrow belt-like insulator is disposed between the separation charger wire and the photosensitive body and an insulative plate is disposed at the boundary between chargers such that the copy paper can be effectively separated.

Abstract: Imaging apparatus includes a light transparent platen for holding an original document which may be smaller than the platen. A light source illuminates the platen to expose a document on the platen. Transmittance of light through that portion of the platen not covered by a document is selectively inhibited, preferably by becoming substantially opaque. A light-blocking platen cover is movable between an operative, light blocking position and a non-use position. The light inhibiting operation is actuated when the cover is moved to its non-use position. Document recognition is used for detecting the outline of the original document on the exposure platen to control actuation of the light inhibiting operation, which is preferably effected by a liquid crystalline cell which has a pair of opposed plates, a grid of transparent electrodes interposed between the pair of plates, and a layer of crystalline material interposed between the pair of plates contacting the grid.

Abstract: A portable image forming apparatus includes a photosensitive member, image forming device for forming an image on a recording medium using the photosensitive member, a battery for supplying power to drive the image forming device, a guiding member for guiding the recording member, the guiding member being swingably mounted to a frame of the apparatus adjacent an end thereof and being movable between a guiding position wherein the opposite end of the guiding member is away from the frame and an accommodating position wherein the opposite end is close to the frame, and a battery accommodating portion for accommodating the battery, the accommodating portion being provided with an openable cover, wherein the guiding member is overlaid to the cover when it takes the accommodating position.

Abstract: A cartridge unit for use in an image forming apparatus, in which a separating unit including a separating tape normally comparatively easily soiled by toner, is provided as one unit together with a photoreceptor drum, corona charger and cleaner unit in the cartridge unit, whereby cleaning of the separating parts at the site of the user is made unnecessary so as to achieve a maintenance-free operation.

Abstract: A method of removing a toner deposited on a rotating drum in a xerographic copying machine, comprises: positioning a blade with its scraping edge positioned closely adjacent to a surface of the drum; and imparting vibrations to the blade so as to bring the scraping edge alternately into and out of contact with the surface of the drum at short time intervals.

Abstract: A fixing device for use in a copying machine. The device has a heating roller, a pressure roller, and a separation pawl. The pawl has an end portion contacting the peripheral surface of the heating roller at a first point close to a second point where the pressure roller and the heating roller contact each other. The pawl separates a sheet, on which an image has been fixed, from the heating roller, and guides this sheet along a line tangent to the periphery of the heating roller and connected to the second point. The sheet is thus prevented from being deformed.

Abstract: A charging method for transfer in an electrograph device having a phtosensitive drum uses a high voltage pulse train applied to a displaceable transferring sheet to effect transfer to the sheet of an image on the photosensitive drum. A detector for detecting the speed of feed of the sheet controls the frequency of the voltage pulse train so that the number of pulses per unit displacement of the sheet is independent of the speed at which the sheet moves.

Abstract: A copier is equipped with an automatic paper transporting device such that documents which have been processed and removed from a document processing position can be discharged onto a receiving discharge tray in a specified sequence. The discharge sequence is stored as input data and a central processing unit makes reference to these data in controlling the motion of the documents, determining for each document whether it should go directly onto the discharge tray or should be temporarily held on another tray. Similar transporting devices can be used in connection with a copier such that documents can be fed in a specified order which may be different from the way they are stacked or that copy paper sheets processed in a certain sequence may be discharged in a different specified sequence.