Abstract: An image formation apparatus includes an input device that is used to enter a desired magnification factor for the image to be formed by the apparatus. If the apparatus is a copying apparatus, the input device can also be used to select the desired number of copies. The apparatus has a display device that displays to an operator the magnification factor. Control circuitry ensures that the display device shows the desired magnification factor.

Abstract: A copying apparatus comprises an optical lens, drive means for driving the optical lens, and control means for controlling the drive means. The control means changes over the output of the drive means in accordance with the distance of movement of the optical lens.

Abstract: This invention provides an image forming apparatus such as electrophotographic copier, microfilm equipment, recording equipment, facsimile or printer. According to this invention, a movable cleaning member is maintained in contact with a member to clean its surface, and the movement of the cleaning member is variably controlled according to the state of image formation.

Abstract: A copying apparatus having a lens position control device capable of setting the copying lens in plural positions for obtaining plural image magnification ratios. The lens position is determined by a control device in response to signals from a lens position detector and pulse signals from a pulse signal generator.

Abstract: There is disclosed a display device for a copier, such display unit being provided with a display generator which generates signals at a determined time interval. A microcomputer is provided with a program interruption port for receiving the signal from the signal generator and performs dynamic drive of the display unit by the signal. The dynamic display control is achieved by interruption signals externally supplied at a determined time interval to the computer. Therefore, a constant display drive timing is maintained regardless of the execution time of the main program and an ensured dynamic display control without flicker in display is obtained.

Abstract: Exposure control apparatus for use in a duplicating machine includes a light source powered with a high-frequency pulsed voltage to generate light, a sensor for sensing intensity of the light to produce a sensor output, and control circuitry for controlling the on/off timing of the pulsed voltage in response to the sensor output. At the time of initial turn-on of the lamp the power applied to such lamp is supplied at an increased rate to hasten the turn-on time.

Abstract: A copy machine has an original feeder for feeding an original document to a predetermined position, image forming apparatus including an original scanning unit, for forming an image of a positioned original onto a copy sheet, a copy feeder for feeding a copy sheet after the start of the feed of the original but before scanning is begun, a jam detector for detecting jamming of a fed original document, and control circuitry for controlling the image forming apparatus in accordance with the output of the jam detector.

Abstract: There is disclosed an image forming apparatus in which copying operations are controlled according to a program sequence. Such image forming apparatus has an input unit for entering copying instructions and sense signals, a control unit for controlling active loads in response to the outputs from the input unit, and logic circuits connected to the control unit for controlling the active loads.

Abstract: A multiple-mode copying apparatus provided with a copy mode selector; and a first controller for causing, in response to the function of the selector, the copying operation to be conducted according to a particular copying mode thus selected. An original document feeder is also provided together with a second controller for causing, when the feeder is set in an operable condition, the copying operation to be conducted according to a particular mode without a previous selection having been made by the selector.

Abstract: A copying apparatus comprises a recording medium, process means for forming an image on the recording medium including image transfer means for transferring the image formed on the recording medium to a transfer medium, feed means for feeding the transfer medium to an image transfer station, memory means for storing the operating time of the feed means so that the leading end of the image on the recording medium and the leading end of the transfer medium are brought into a predetermined relationship, and control means responsive to the output of the memory means to control the time whereat the feed means operates.

Abstract: A method and an apparatus for color conversion capable of converting a particular color of an image original into another color as desired, in which indication is made as to what color of the image original colors other than that designated for the color conversion can be converted into, and, on the basis of this indication, designation for the color conversion in the image original colors other than that previously designated can be done, and, further, on the basis of this color conversion designation, a set of the color-separation filter and the developing color can be automatically selected.