Abstract: An image forming apparatus for conducting a different manner of copy process for each of a plurality of regions which are subdivided from one original document. The image forming apparatus includes a plurality of levers for assigning boundaries of each region and a specifying device for specifying the number of regions and pattern of the copy process executed in each region. At least one of the plurality of designating levers are invalidated so as to achieve agreement between the number of the regions specified by the specifying device and the number of the regions subdivided by the designating levers when these numbers do not agree.

Abstract: In a scan-mode changeable image duplicating apparatus including scanner units for optically scanning a document and having a scanner-moved scanning mode in which the scanner units is driven to move for scanning a document fixedly held in place and a document-moved scanning mode in which the scanner units is fixed to scan a document being moved with respect to the scanner units, a control system comprising an initial scan-mode select switch allowing the user of the apparatus to select one of the scanner-moved and document-moved scanning modes as a preferential initial scanning mode, a duplicating mode select key allowing the user to select a predetermined duplicating mode which is compatible with both of the document-moved and scanner-moved scanning modes, and a control circuit for judging whether or not the predetermined duplicating mode is currently selected by the duplicating mode select key and automatically selecting the preferential initial scanning mode when it is judged that the predetermined duplicati

Abstract: This invention relates to a key input apparatus used for inputting the information into various electronic equipments, such as a computer or a computer applied equipment, and the key input apparatus according to this invention has a variable resistance circuit which comprises a plurality of key switches and a plurality of resistance elements connected thereto and changes the resistance value thereof corresponding to the depressed key switch. The apparatus can generate analog voltage corresponding to the change in the resistance value and convert the analog voltage into a digital signal to thereby discriminate the depressed key switch on the basis of the output of the digital signal, whereby the number of signal conductors or terminals between the keyboard and the equipment to be inputted with information is reduced.

Abstract: A display device for copying machines and the like and having separate two display sections for displaying conventional numeric information, the two display sections being commonly used for displaying non-constant numeric data. The non-constant numeric data is divided into high-order multiple columns and low-order multiple columns, so that each multiple columns is displayed in a separate displaying section, respectively.

Abstract: An image forming apparatus equipped with a plurality of developing units respectively using different color toners, and capable of forming a two-color image. The image forming apparatus is able to operate selectively in a first image forming mode for forming a single-color image, and in a second image forming mode for forming a two-color image. In the second image forming mode, sections of a latent image respectively corresponding to previously demarcated sections of the contact glass are developed in two different colors by operating the two developing units in an appropriate sequence. Selection of the second image forming mode is inhibited and an alarm signal is provided when only one of the plurality of developing units is mounted in place on the frame of the image forming apparatus.

Abstract: The present invention relates to a copying machine constructed so as to make maintenance, and the replacement period for components in particular, readily understandable. The apparatus includes a first counter which counts the number of copies reproduced and a second counter which counts the use frequencies of the component whose use frequencies are not countable by said first counter.

Abstract: A display unit having a light-receiving type display device for displaying an information by receiving light from external light source and a self-illuminating type display device provided under the light-receiving type display device for acting as the external light source for the light-receiving type display device and for displaying information different from the information displayed by the light-receiving type display device. The light-receiving type display device and the self-illuminating type display device each display a predetermined pattern different from the other.

Abstract: A multiple-mode image duplicating apparatus having a plurality of groups of modes of operation, comprising image reproducing means, first selecting means for selecting a single group of modes out of the plurality of groups of modes of operation, second selecting means for selecting a single mode of operation from the group of modes selected by the first selecting means, and control means for controlling the image reproducing means to operate for the mode of operation specified by the first and second selecting means.

Abstract: The present invention relates to a copying apparatus capable of executing various copying operations. The copying apparatus has a first key for designating a format of an original document to be copied and a second key for designating a format of a copy to be formed and forms the image of the original document on a copy sheet in the designated format.

Abstract: A copying apparatus having the capability to write optional pattern information on a copy sheet. The apparatus comprises an original glass plate, a photosensitive drum, plural devices for forming copied image of the original document on the photosensitive drum, an editor 900 for inputting arbitrary coordinates data, an eraser including an LED array, a control circuit for controlling the eraser in accordance with the input data, and a transfer device for transferring the copied image and the pattern image on the same surface of copy sheet.

Abstract: A copying machine capable of operating in the divisional copying mode in which first and second documents, such as the successive pages of an open book, placed on the contact glass are copied on different recording medium surfaces, respectively. The copying machine is provided with copying condition setting means capable of individually setting different copying conditions, such as copied image density, for the first and second documents, respectively. The first document and the second document are scanned under the copying condition set for the first document and under the copying condition set for the second document, respectively, and the first and second documents are copied on different recording medium surfaces, respectively.

Abstract: In a scanning type copying machine of the present invention, a scanner scans divided regions of a document prior to real copy operation when a dividing copy mode is selected by a book copy mode selection key. Density control data in the respective divided regions are stored in memory and an exposure lamp is controlled by a MPU so that a copy of an appropriate density can be formed according to the stored density control data. Thus, without being unfavorably influenced by a difference of the densities in the divided regions of the document, copies of appropriate densities can always be obtained.

Abstract: In an original illumination device with an automatic illumination control according to the present invention, light from an exposure lamp (6) illuminates an original (1) and a reference density plate provided on the lower surface of a table (2), reflected light from the original (1) is directed to a photosensitive drum (13), and reflected light from the original (1) and the reference density plate (3) is detected by a photo detector (14), whereby an MPU (17) controls power supply to the exposure lamp (6) by an exposure lamp regulator (19) based on the detection output of the photo detector (14).