Abstract: A paper feeding device wherein a backing plate for carrying thereon papers is moved up and down by a lifting device, a rotating device rotates a rear regulating member mounted on the backing plate with respect to the backing plate while the crest of the rear regulating member makes contact with a cover of a paper container when the backing plate is lifted by the lifting device.

Abstract: There is disclosed a microfilm reader-printer which permits to be set a number of pages of printing which exceeds a maximum number of pages of continuous printings of the printer body. The printer body outputs a completion signal to a device which set the number of pages of printing when printing is completed. The device sends a print request signal to the printer body every time when it receives a complete signal, until completion of printing for the set number of pages. The printer body completes the printing operation once for each maximum continuous number of pages of printing, but resumes printing if a print request signal is outputted successively.

Abstract: A document registration system is disclosed which enables documents of various sizes to be registered at different corner registration positions on a platen and to be projected onto a photoreceptor so that the projected images have one side aligned along a common edge parallel to the edge of the photoreceptor. A lens drive and control circuit is provided for determining lens position, comparing it with a home position and moving the lens to a new position associated with the particular registration and magnification.

Abstract: A cleaner unit is disclosed with a rubbery elastic cleaning blade. The blade extends horizontally from an upright base member, where the cleaning edge contacts a vertically downward passing photoconductive surface such that toner scraped from the surface travels over the upper face of the blade without causing a toner cloud. The removed toner is guided over this upper surface of the cleaning blade through the use of seals along the cleaning blade edge and outside the image carrying area of the photoconductive surface, as well as through the use of toner guiding grooves between the end seals.

Abstract: A mechanism for toning electrostatic images has two storage means for developer containing toner of different characteristics, for example, different colors. A rotational applicator rotates in one direction to transport developer from one storage, past the other storage, to a development zone and back to the storage. The applicator moves in the opposite direction to similarly transport developer from the other storage. A shield blocks the unused storage means in each mode. By transporting developer past the unused storage means on the way to the development zone, the developer can simply fall into the appropriate storage means on leaving the development zone.

Abstract: An electrophotographic copying machine device provided with a pair of lens arrays installed in parallel to enable variable- or actual-size copying and a means for selectively directing the light-path, allowing each lens array to select its light-path before projecting the original image onto a recording medium such as a photoreceptive drum, in which the copying device incorporates the following: equalizing the distance between original-scanning starting points for actual- and variable-size copying to the distance between light-exposure positions on the recording medium by applying variable-size lens array; equalizing the distance between light-exposure positions on the recording medium, corresponding to the original-scanning starting point, and the image transfer starting position, by which image on the recording medium is transferred to the transference material using the variable-size lens array, to the distance for transferring the transference material from its standby position to its transference positio

Abstract: The present invention relates to a transfer sheet guiding device. The transfer sheet guiding device includes a separator for separating one lateral side of the transfer sheet from a photosensitive drum and a guiding plate for guiding the transfer sheet in a direction away from the photosensitive drum. The guiding plate extends in an adjustably inclined position with one lateral side thereof adjacent the separating means disposed at a level lower than the other lateral side thereof.

Abstract: A developing apparatus which includes a developing sleeve rotatably provided to confront an object to be developed, a magnet roller incorporated within the developing sleeve so as to be driven for rotation in the same direction as the developing sleeve, and a supply device for supplying developing material onto the peripheral surface of the developing sleeve. The developing apparatus is so arranged as to satisfy such conditions asD.multidot..pi..multidot.Wsl>d1.multidot.p.multidot.WmgwhereD: developing sleeve diameter (mm)Wsl: developing sleeve revolutions (rpm)d1: the closest distance between the sleeve surface and the object to be developedp: number of poles of the magnet rollerWmg: revolutions of the magnet roller (rpm).

Abstract: An electronic copying machine for copying an image on a document, onto a sheet, includes a deelectrifier for electrically peeling off a sheet, on which a toner image has been formed, from a photosensitive drum, and a peel-off tape which is engaged with a sheet, to mechanically peel it from the photosensitive drum. After a copying operation, a sheet is stacked in a stacking tray which is selectively moved to a position at which it is engaged with or not engaged with the peel-off tape. During a second copying operation, after a position-setting operation is performed in the stacking tray, the sheet is conveyed to a transfer position of the photosensitive drum. After the second transfer operation, the sheet is selectively peeled off by the peel-off tape, in accordance with the position preset by the stacking tray.

Abstract: An electrostatic photographic apparatus according to the present invention includes a lower unit, an upper unit connected for opening and closing motion to the lower unit and carrying a light source and a paper receiver thereon, a developing unit including a holding member on which a photosensitive member, a developer and a cleaning mechanism are mounted, supporting means located on the lower unit for positioning the developing unit and for removably supporting the developing unit in a vertical direction thereon, and pressing means located on the upper unit for pressing against the developing unit supported on the supporting means, whereby various mechanical components are shared by the lower unit and the upper unit. Accordingly, disassembling of the developing unit for maintenance and releasing of paper jamming can be achieved readily.

Abstract: Disclosed is an electrostatic image output apparatus comprising a layer composed of a dielectric material or a photoconductor, image element electrodes arranged in the form of a matrix on one surface of said layer, field effect transistors affiliated with the image element electrodes and interposed between the image element electrodes and the earth, and a charging mechanism arranged on the other surface of the dielectric material or photoconductor layer.In this electrostatic image output apparatus, an electrostatic image having a high surface potential and a high potential contrast can be formed by an electric signal of a very small output and therefore, an image excellent in the image quality and density can be obtained without tailing or shadowing.

Abstract: An image forming apparatus includes a plurality of the developing devices for developing the latent image formed on an image bearing member. The plural developing devices are each movable between its developing position for developing the latent image on the image bearing member and its retracted position away from the image bearing member. The image forming apparatus includes a shutter for selectively opening and closing the developing aperture of the developing device of one of the developing devices. The shutter opens and closes the developing aperture of said one of the developing devices in association with movement of the other developing device between the developing position and the retracted position.

Abstract: A drum unit exchange time indicating device for image forming apparatus comprises, an integrated signal output means to give output of integrated signal added up according to the time of use of the drum unit, a life signal output means to give output of drum unit life signal when said integrated signal exceeds predetermined value and a paper-feed mode changing means to change the mode of paper-feeding into an extraordinary mode when said drum unit life signal is detected.

Abstract: A sheet feeding apparatus suitable for use in combination with an imaging system, such as a copier or printer, for feeding sheets of paper one by one to the imaging system is provided. The apparatus includes a predetermined path along which a sheet of paper is transported and a sensor for detecting the presence of a sheet of paper in a predetermined region of the path. When paper jamming of another sheet of paper is detected, if the sensor detects the presence of a sheet of paper in the predetermined region, a controller controls such that the sheet of paper in the predetermined region is transported in the reversed direction so that the sheet of paper is returned to a paper storing section for use in the next cycle of operation. With such a structure, any sheet of paper left unused in the travelling path when paper jamming of another sheet of paper has occurred is automatically returned to its storage so that the operator is not required to remove this unused sheet of paper.

Abstract: In a developing apparatus for developing an electrostatic latent image by applying a charged developer to the latent image formed on the surface of an image carrier, a housing, stored with the developer, is provided with a developing roller for feeding the developer therefrom to a developing position. A plurality of blades are pressed against the developing roller, whereby the developer is triboelectrically charged.

Abstract: A printing system for transferring powder images formed on a photo-sensitive drum to a printing sheet at a transferring station, into which the sheet is fed at a predetermined speed. The transferred powder images are fixed onto the sheet at a fixing station, while the transferred sheet is moved at a different speed. The transferred sheet is transported by a belt conveyor from the transferring station to the fixing station and is detected by a sensor located at a position between the transferring station and the belt conveyor, whose speed is controlled in accordance with data detected by the sensor.

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: The present invention relates to a copying machine capable of executing a duplex mode copying and composite mode copying. The copying machine has an intermediate tray for receiving and aligning the copied papers and for re-feeding them to an image formation station. The operation of the intermediate tray is controlled in accordance with the copy mode.

Abstract: A device for conveying a magnetic developer, includes a non-magnetic sleeve for carrying the magnetic developer, a resin magnet stationarily disposed in the sleeve, the magnet being of a mixture of a resin material and a magnetic material, and extending in a direction of a length of the sleeve, the magnet having first and second magnetic field generating portions, first and second magnetic members disposed outside the sleeve extending in the direction of the length of the sleeve, wherein the first and second magnetic members are spaced apart from each other and are so disposed that a magnetic force applied to the magnet by a magnetic force between the first magnetic field generating portion and the first magnetic member reduces a resultant force to the magnetic by gravity and by a magnetic force between the second magnetic field generating portion and the second magnetic member.

Abstract: A developing device includes a unit support member attached to an opening formed in a front panel of image forming apparatus, support for supporting the unit between the unit support member and a rear panel of the apparatus with the unit pivotable about an axis parallel to the rotation axis of the photoreceptor, and a guide mechanism for guiding a casing of the unit, whereby when the unit is set in the apparatus, a developing sleeve is put in a first state in which the sleeve is near the photoreceptor, and when the unit is inserted in and drawn out of the apparatus, the sleeve is put in a second state in which the sleeve is spaced apart from the photoreceptor. Also when the unit is set in the apparatus, the sleeve is changed from the first state to the second state and vice versa.