Abstract: A digital image forming apparatus includes a CCD optical unit and an information editing section. The CCD optical unit inputs image information to an image control unit (ICU) upon an instruction to start image formation input through an operation panel. The information editing section inputs the image information to the ICU upon an instruction to start image formation input by a keyboard. The ICU stores the image information input from the information editing section page by page depending on an image processing mode specified through the operation panel and the keyboard, and successively performs image processing on the stored image information page by gage. With this arrangement, various image editing functions of a digital copying machine is effectively used for image information input from the information editing section.

Abstract: An image forming apparatus stores an ID number input through an auditor in a memory section when a paper money judging section judges that image data obtained from an image reading section is the image data of paper money. With this structure, the fact that an attempt to perform counterfeiting was made is known by reading out the ID number stored in the memory section. In this case, since it is understood that a counterfeiter knew a specific ID number, the counterfeiter can be detected from a limited number of people. It is thus possible to take some measures to prevent recurrence of counterfeiting by, for example, enhancing the inspection of the image forming apparatus and giving a warning to the counterfeiter.

Abstract: A cleaning unit used for cleaning the surface of a recording medium in an image forming apparatus, the cleaning unit having a head being moved so as to contact with and separate from the recording medium on the basis of the assessment of preset image forming conditions such as paper size, document size, and copy magnification, and a control section for moving the cleaning head at a detected appropriate time, wherein the cleaning head is released so as to avoid the dispersion of toner that is likely to spoil the image.

Abstract: An electrophotographic apparatus is provided with a fixing device having the first through third fixing rollers for forming the first fixing section by contacting the first and second fixing rollers as well as forming the second fixing section by contacting the second and third fixing rollers, the first fixing section being temperature-adjusted in relation to a first copying mode, the second fixing section being temperature-adjusted in relation to a second copying mode. Either the first or second fixing section is temperature-adjusted according to the order of priority in such a manner that after the completion of the temperature adjustments, temperature adjustments with respect to the other fixing section is successively carried out.

Abstract: An apparatus (10) for controlling a location of an image on a conductive transfer belt (15), the conductive transfer belt having a hole (14) and for transferring a plurality of images formed on a photosensitive belt (11), the apparatus includes a transparent photosensor (16) for sensing a location of the hole and for supplying a signal indicating the sensed location, and a microprocessor (CPU) for controlling a relative location of the conductive transfer belt with respect to the photosensitive belt, the microprocessor serving to transfer a plurality of images formed on the photosensitive belt onto different locations on the conductive transfer belt in accordance with the signal.

Abstract: A developing apparatus which includes a plurality of developing units individually provided with sensors for detecting amount of toner accommodated therein, includes a judging device for judging whether or not sensor outputs of other developing units are below a replenishable amount when a sensor output of one developing unit falls below a replenishing requiring amount, and a replenishing display device for urging toner replenishment, based on the result of the above judgement, with respect to the developing unit having the sensor output below the replenishing requiring amount and the developing unit whose sensor output is below the replenishable amount.

Abstract: A data processing apparatus provided in a copying machine is provided for eliminating the need for replacing the data such as adjusting values in case of replacing a memory board in the copying machine. The data processing apparatus provided in a copying machine which is used when a first memory for storing electrical signals indicative of adjusting values needed in operation of the copying machine is replaced by a second memory, the data processing apparatus includes means for printing-out on a sheet image informations representative of the adjusting values stored in the first memory, means for reading the image informations on the sheet, and means for converting the read image informations to electrical signals indicative of adjusting values and for storing the converted electrical signals in the second memory.

Abstract: A developing apparatus which includes a plurality of developing units individually provided with sensors for detecting amounts of toner accommodated therein, includes a judging device for judging whether or not sensor outputs of other developing units are below a replenishable amount when a sensor output of one developing unit falls below a replenishing requiring amount, and a replenishing display device for urging toner replenishment, based on the result of the above judgement, with respect to the developing unit having the sensor output below the replenishing requiring amount and the developing unit whose sensor output is below the replenishable amount.

Abstract: An electrophotographic apparatus is provided with a developing device accommodating a plurality of developer tanks and a system for preventing erroneous mounting of these developer tanks. The developer tanks contain respective developers different in color from each other and are detachably mounted in respective predetermined mounting portions of the developing device. The system includes a connector formed on each of the developer tanks, a fixed connector formed on each of the mounting portions of the developing device and a controller for outputting at least one discrimination signal and judging whether or not the discrimination signal is inputted into the controller through at least one set of connectors. The connectors in each set are electrically connected with each other when each developer tank is properly mounted in its predetermined mounting portion of the developing device.

Abstract: A copying apparatus having a prescanning function for obtaining density data to adjust copy parameters includes a correction function which eliminates the data obtained from a portion of a predetermined color, from the density data detected on a prescanning process. The density data can be restricted within a predetermined range. The predetermined range can be easily set by the user.

Abstract: An electrophotographic copying machine includes a photoreceptor for forming a latent image of a copy document, a transfer corona charger for transferring the latent image onto a copy document, a separation corona discharger for removing charges from the copy paper, and aid in the separation of the copy paper from the latent image. The corona discharge output of the separation corona discharger is adjustably changed depending on an amount of light reflected by the copy document to more effectively provide for the separation process.