Abstract: An automatic document conveying device for an image processor having a transparent plate disposed on the upper surface of a housing for placement of a document to be processed thereon. The automatic document conveying device comprises a document introduction portion, a main portion and a document delivery portion. The document introduction portion includes an introduction portion frame member, a document table extending upstream from the introduction portion frame member, a document introduction passage extending from the document table to the transparent plate inside the introduction frame member, a document sender for sending the document into the document introduction passage from the document table, and a document introducer for introducing the document onto the transparent plate from the document introduction passage.

Abstract: An automatic document conveying device for an image processor having a transparent plate disposed on the upper surface of a housing for placement of a document to be processed thereon. The automatic document conveying device comprises a document introduction portion, a main portion and a document delivery portion. The document introduction portion includes an introduction portion frame member, a document table extending upstreams from the introduction portion frame member, a document introduction passage extending from the document table to the transparent plate inside the introduction frame member, a document sender for sending the document into the document introduction passage from the document table, and a document introductor for introducing the document onto the transparent plate from passage.

Abstract: An automatic document conveying device is provided in an image-processing machine having a transparent plate on which a transparent plate on which to place a document to be processed, the transparent plate having been disposed on the upper surface of a housing. The automatic conveying device is provided with a document delivery re-introduction section which sends a document delivered through a document introduction section and a central main portion selectively to a first document receiving tray, a second document receiving tray and a transparent plate by use of multiple branched sheet passageways. The document delivery re-introduction section is provided with a first branched passage for sending a document into the first document receiving tray, a second branched passage for sending the document into the second document receiving tray, and a re-introduction passage for re-introducing the document into a transparent plate.

Abstract: An automatic document conveying device to be applied to an image processor with a transparent plate on which to place document to be processed being disposed on the upper surface of a housing. The automatic document conveying device comprises a document table, a document introduction passage extending from the document table to one end edge of the transparent plate, a first document receiving tray, a second document receiving tray and a document delivery passage. The document delivery passage includes a common passage extending from the other end edge of the transparent plate, a first branched passage extending from the downstream end of the common passage to the first document receiving tray, and a second branched passage extending from the downstream end of the common passage to the second document receiving tray.

Abstract: A copying paper feeding device comprises a first and a second paper loading sections to be loaded with a stack of copying paper sheets, a first and a second paper delivery mechanism disposed respectively in the first and second paper loading sections, a first and a second paper introducing passage extending respectively from the first and second paper loading sections and terminating in a common point of junction, a paper conveying passage extending from the point of junction, a first conveyer roller pair disposed in the first paper introducing passage, and a second conveyor roller pair disposed at the point of junction or at an upstream part of the paper conveying passage. In performing a copying process, either the first or second paper delivery mechanism is selectively actuated. The first and the second conveyor roller pairs are interlocked with each other, and adapted to be started after the first or second paper delivery mechanism has been actuated.

Abstract: A sorter comprising a plurality of vertically arranged bin trays. The bin trays have widthwise projecting trunnions at least in one side thereof. The trunnions are stacked vertically and can move in the stacking direction along a predetermined moving passage. The sorter further comprises a transfer mechanism for elevating and lowering the trunnions successively one by one along the predetermined transfer passage and successively spacing adjacent bin trays vertically at their sheet receiving ends to form a sheet receiving opening. The transfer mechanism has a pair of cooperating rotating cam plates. Each of the rotating cam plates has at least one trunnion receiving groove extending radially and being opened at its radial outside end and an outer circumferential cam surface continuously extending circumferentially excepting the site of the trunnion receiving groove. The outer circumferential cam surface is a convoluted surface whose radius progressively increases in a predetermined rotating direction.

Abstract: A sorter comprising a plurality of vertically arranged movable bin trays and a transfer mechanism for elevating and lowering the bin trays successively. Follower projecting portions, projecting in a predetermined direction, are provided respectively on the bin tray. The projecting lengths of the projecting portions increase stepwise from the bottom to the top of the bin tray arrangement.

Abstract: A novel original illuminator of electrophotographic copying machine capable of leading the majority of light from the illuminant onto the original surface placed on the contact glass by applying the condenser mirror to allow the light not oriented to the original to reflect itself by a mirror opposite from the condenser mirror before eventually leading light to the illuminant over again.

Abstract: A paper feeder equipped with copying paper cassettes comprises a cassette-receiving section within the housing of a copying apparatus for mounting thereon a plurality of copying paper cassettes containing sheets of copying paper having different sizes. Each of the paper cassettes includes a main body for holding paper sheets which has an opening formed at the forward end portion of its bottom wall and a bottom plate for placing paper sheets thereon which is mounted on the bottom wall of the main body of the cassette so that it can freely pivot about its rear end portion as a fulcrum. The housing of the coyping apparatus has provided therein a press-contacting mechanism adapted to act on the bottom plate of the cassette through the opening in the main cassette body.

Abstract: An electrostatic copying process and apparatus capable of forming copies in at least two different ratios. The formation of a copied image involves exposure scanning of the image of an original document and projecting it on a photosensitive member through an optical device. The change of the ratio of copying is achieved by changing the ratio of projection of the image of the document onto the photosensitive member by the optical device, and also changing the speed of scanning.

Abstract: A cleaning device in an electrostatic copying apparatus, for removing residual toner particles from the surface of a photosensitive member adapted to move through an endless conveying passage, includes a blade holding mechanism mounted pivotally around an axis extending substantially parallel to the surface of the photosensitive member and substantially perpendicular to the moving direction of the photosensitive member, and a cleaning blade mounted on the blade holding mechanism. The cleaning device further includes a first spring elastically biasing the blade holding mechanism to a non-operating position in which the cleaning blade is away from the surface of the photosensitive member and an operating mechanism selectively positioning the blade holding mechanism against the elastic biasing action of the first spring to an operating position in which the cleaning blade is pressed against the surface of the photosensitive member.

Abstract: An electrostatic copying process and apparatus capable of forming copies in at least two different ratios. The formation of a copied image involves exposure scanning of the image of an original document and projecting it on a photosensitive member through an optical device. The change of the ratio of copying is achieved by changing the ratio of projection of the image of the document onto the photosensitive member by the optical device, and also changing the speed of scanning.

Abstract: An electrostatic copying process and apparatus capable of forming copies in at least two different ratios. The formation of a copied image involves exposure scanning of the image of an original document and projecting it on a photosensitive member through an optical device. The change of the ratio of copying is achieved by changing the ratio of projection of the image of the document onto the photosensitive member by the optical device, and also changing the speed of scanning.

Abstract: An electrostatic copying process and apparatus capable of forming copies in at least two different ratios. The formation of a copied image involves exposure scanning of the image of an original document and projecting it on a photosensitive member through an optical device. The change of the ratio of copying is achieved by changing the ratio of projection of the image of the document onto the photosensitive member by the optical device, and also changing the speed of the scanning.

Abstract: An automatic exposure device wherein the quantity of light from an exposure lamp is detected by lamp light quantity detecting means, while the reflected light from a region of a document located forwardly of a region of the document being exposed is received by density detecting means, the output signal from said lamp light quantity detecting means being used as an input by reference signal producing means which produces a reference signal, the output signal from said density detecting means and the reference signal being used as inputs by correcting means which corrects the output signal from the density detecting means in accordance with an increase in the quantity of light from the lamp, the output signal from said correcting means being used as an input by lamp control means which controls conducting-angle of the exposure lamp.

Abstract: A variable magnification electrostatic copying apparatus comprising a transparent plate on which to place a document to be copied, an optical system for projecting the image of the document onto an electrostatographic photosensitive member at any desired projecting ratio selected from a plurality of projecting ratios in an exposure zone located along the moving path of the photosensitive member, and a driving means for moving at least a part of the optical system and the transparent plate relative to each other. The optical system includes at least one position-variable optical element assembly adapted to be held at any of a plurality of positions corresponding to the aforesaid plurality of projecting ratios. The variable magnification electrostatic copying apparatus includes a unique improved means for varying the projecting ratio of the optical system by moving the position-variable optical element assembly.

Abstract: An electrostatic copying apparatus including a support frame having a front support wall and a rear support frame. The support frame is mounted on a housing slidably in the front and rear direction between an operating position within the housing and a pull-out position outside of the housing. A rotating drum and a developing device are mounted on the support frame. Each of the rear surface of the front support wall and the front surface of the rear support wall has a semicircular receiving portion with an open top, and each end of the rotating drum has a shaft bearing member with a circular peripheral surface. By inserting each bearing member into the associated receiving portion, the drum is rotatably mounted. The developing device has a front wall and a rear wall, with a projecting portion formed at the end of each. An abutting lower edge is defined on each projecting portion, and an abutting front edge is defined on each of the front wall and the rear wall, below the projecting portion.

Abstract: A paper guiding device in a copying apparatus includes, in opposition, a lower guide plate having a main flat portion and an upper guide plate having a main flat portion. A plurality of rising pieces, having top edges and being laterally spaced apart upon the upper side of the main flat portion of the lower guide plate, rise above the lower guide plate and extend in the direction of movement of the copying paper. A plurality of hanging pieces, having lower edges and are laterally spaced apart on the lower side of the main flat portion of the lower guide plate, hang from the upper guide plate and extend in the direction of movement of the copying paper. The top edges and the lower edges define a path of movement of the copying paper while having minimal contact with the paper.

Abstract: A copying apparatus includes a sorter which is arranged to sort a plurality of copy paper sheets corresponding to a single original document, discharged from a main body of the copying apparatus, into a plurality of bins successively shifted to a paper discharge position by a shifting device. The copying apparatus includes a copy number preset key, a memory for memorizing a preset number of copies, a first counter for counting the number of copied paper sheets, a second counter for counting the number of discharged copy paper sheets, a device for stopping the copying operation when the counted value of the first counter agrees with the memorized preset number of copies, and a sort key for selecting a mode for sorting the copy paper sheets into the bins one sheet in each bin. An electrical circuit applies signals to the shifting device in order to change the moving direction of the bins when the counted value of the second counter agrees with the memorized preset number of copies in the sort mode.

Abstract: An electrostatic copying method of the transfer type which comprises repeatedly performing a copying cycle including an image-forming step of forming a latent electrostatic image on a photosensitive material moved through an endless moving path or a toner image obtained by developing it, a transfer step of transferring the latent electrostatic image or the toner image on the photosensitive material to a receptor member subsequent to the image-forming step, and a cleaning step of cleaning the photosensitive material subsequent to the transfer step.