Abstract: This invention is to provide such a copying machine that when a copying operation is carried out, a document is placed on a document glass platen by an autodocument feeder, a copying paper having a size suitable for the document is automatically fed to a photo-receptor drum from one of plural cassettes, an image of the document is formed on the copying paper fed to the drum, and after the copying operation finishes, the document is discharged from the platen. If there is no copying paper having a size suitable for the document in the copying machine, the copying operation is interrupted. In the interruption of the operation, when a copying paper is manually fed from a manual paper feeding table in the machine, the copying operation starts again.

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 copying apparatus comprises at least one sheet storing tray, at least one detector for detecting a quantity of sheets of paper in a tray, and an indicator. The indicator can display a capacity of a tray selected for copy operation and can also display a remaining quantity of sheets in that tray in response to the detector.

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: An electrophotographic copying machine capable of editing function comprising: a table for setting a document; scan means for scanning the document; first input means for providing first and second data to specify positions in the scanning direction; second input means for providing third and fourth data to specify positions in the direction perpendicular to the scanning direction; memory means for storing the provided data, which comprises a first memory area for storing smaller data provided by the first input means, a second memory area for storing larger data provided by the first input means, third memory area for storing smaller data provided by the second input means, and a fourth memory area for storing larger data provided by the second input means; a means for specifying an area on the basis of the data stored in the memory means; and copying means for reproducing a image of the document corresponding to the specified area.

Abstract: A copying machine is disclosed. The copying machine includes designation means for designating a magnification for copying, document size detection means, manual entry means for entering a magnification to be referred as the standard one, and calculation means for calculating a paper size based on the designated magnification and the detected document size, said calculation means calculating a paper size according to first regulations in the case that the designated magnification is smaller than the standard one entered and calculating a paper size according to second regulations in the case that the designated magnification is equal to or larger than the standard one.

Abstract: A copying apparatus in accordance with the present invention is provided with an automatic document feeder in the main body of the copying apparatus. The automatic document feeder has a document transport portion for moving and stopping a document; a document feed portion for feeding the document to the document transport portion; and a document discharge portion for receiving the document sent from the document transport portion. The document feed portion includes a plurality of document feed units which are provided in a detachable manner. The document discharge portion has a plurality of detachable document discharge units which are placed one upon another in a vertical direction. By thus constructing the automatic document feeder, document feed units can be coupled freely in a desired manner of utilization so that copy processing can be performed.

Abstract: An image duplicating apparatus having a document table for supporting a document sheet thereon divides an image area of the document into two sections and successively duplicates the respective images of the two sections onto two separate copy surfaces. Switches specify the ratio by which an image on the document sheet is to be magnified or reduced for. An image magnification/reduction lens unit responds to the switches for altering a currently established magnification or reduction ratio to the newly specified ratio of magnification or reduction. A control circuit controls the duplicating means so that, when the magnification or reduction ratio is altered prior to termination of the duplication of a first one of the two sections, a second one of the two sections is copied in the altered magnification or reduction ratio.

Abstract: A data transmission system includes a host CPU having an output terminal for repeatedly producing a predetermined number of data blocks in a predetermined sequence in a repeated manner. Each data block is defined by a sequence code for identifying each data block and specific data followed by the sequence code. A plurality of slave CPUs are provided. The host CPU is connected to each slave CPU through a bus structure for the mutual data transmission. Each slave CPU receives all the data blocks and selectively extracts only the necessary data for use in each slave CPU and produces data from its output terminal at a given period within one cycle of the predetermined sequence. The given period for one slave CPU differs from that of another slave CPU, thereby transmitting data to the host CPU without any interferences.

Abstract: An image forming machine is disclosed. The image forming machine provides a duplex copy means for copying first and second images on first and second sides of a sheet, respectively, and/or a composite copy means for copying first and second images on one side of a sheet, an information writing means for forming an information at a predetermined position on a sheet and means for controlling said information writing means. Said control means automatically changes the position for writing an information upon the first and second copying in the duplex mode. If the composite copy mode is designated, the information is written only one time during the composite copy mode.

Abstract: The present invention is directed towards an improvement in a copying apparatus capable of executing a plurality of copy modes including an ordinary copy mode and one or more special purpose copy modes. A mode key switch is provided for setting the copy mode to the ordinary copy mode or to the special purpose copy mode. The mode key switch is biased to normally select the ordinary copy mode. Input keys are provided for inputting values for the special purpose copy mode, and a visual display may be provided for displaying the values set with the input keys. The values of the special purpose copy mode may be changed by operating the input keys while continually depressing the mode key switch. The photocopier is inhibited from making any changes in copying mode while the operator is setting the desired values.

Abstract: A copying apparatus capable of performing a first copy operation and a second copy operation on a sheet of copy paper in a duplex copy mode or a composite copy mode, a first group of input copy conditions are set to a first predetermined state if the second copy operation does not start within a first predetermined period of time after the first copy operation, and a second group of input copy operations are set to a second predetermined state if the first copy operation of the subsequent cycle does not start within a second predetermined period of time after the second copy operation, the first predetermined period of time being longer than the second predetermined period of time.

Abstract: A copying apparatus, having an editing function, charges a rotating photoconductive drum 61 by chargers 63 and 65 and forms an electrostatic latent image on the photoconductive drum 61 by projecting an image of a document on the drum 61, whereby the electrostatic latent image is developed by toner. An erasure array 4 including LED elements is provided close to the photoconductive drum 61. In an edit copy mode, data for specifying a region to be copied on the document is inputted by using keys on an operation panel. As a result, the erasure array 4 removes the electric charge on a region of the photoconductive drum 61 corresponding to the specified region prior to exposure, whereby the electrostatic latent image can be prevented from being formed on this region.

Abstract: A copying apparatus of the present invention is capable of executing, for example, a duplex-simplex copy mode wherein images on both sides of an original are respectively copied on one side of a different copy paper and a simplex-simplex copy mode wherein an original with an image on one side is copied to one side of a single copy paper. The copying apparatus is further capable of executing a shift mode for controlling the relative position between the images on the original and those on the copy paper if the original represents a binding margin in the duplex-simplex copy mode. This shift mode is released when the simplex-simplex copy mode is selected.

Abstract: Disclosed herein is a device for setting a copying magnification in an electrophotographic copying apparatus. The device comprises means for manually inputting a numerical value, a plurality of memory means, selection key means for selecting one from the plurality of memory means and control means for memorizing a numerical value input by the numerical value input means in said one of memory means selected by the selection key means, so that the copying apparatus operates to set a copying magnification by a numerical value memorized in said one of memory means.

Abstract: An electrophotographic copying machine comprising a document supporting glass plate for supporting an original document thereon, an optical system for scanning the document on the document supporting glass plate, a photoreceptor drum for recording the image of the document scanned by the optical system, and timing rollers for feeding copying paper to which the image on the photoreceptor drum is transferred. The document supporting glass plate defines a reference position with respect to a direction of scanning by the optical system. The timing rollers are controllable such that the image present on the photoreceptor drum when the optical system scans the reference position is transferred to a central position of the copying paper with respect to a copying paper feed direction.

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: An image forming apparatus having a presettable counter and a display device for displaying the contents of the counter, in such arrangement that when copying operation is carried out in the automatic paper feed mode, the content of the counter is decreased by "1" at a time, and when copying is made in the manual paper feed mode, the content of the counter is increased by "1" at a time. For operation in the automatic feed mode, as is the case with the prior-art arrangement, a required number of copies to be made is preset into the counter and the remaining necessary number of copies to be made is displayed on the display device. When operation is performed in the manual feed mode, the number of copies already made is preset in the counter, and when the contents of the counter reaches the required total number of copies, paper feeding will be stopped.

Abstract: A copying machine is disclosed which has a plurality of copying paper feeding means, means for detecting a document size to be copied, means for designating a copying magnification and means for designating one paper feeding means to be used preferentially.Further, the copying machine has calculation means for calculating the most suitable size based on the document size and the designated magnification.One paper feeding means is automatically selected referring to data corresponding about the document size, the most suitable paper size and the preferential paper feeding means and so on.