Abstract: An automatic sheet feeder for feeding a sheet to a processing station to record the information on the sheet. Also, an image recording apparatus provided with such an automatic sheet feeder. The automatic sheet feeder includes a sheet stacking tray for supporting a stack of sheets, a feeder for feeding one by one the sheets out of the stack, a processing station for effecting a required processing to the surface of the sheet bearing the information to be recorded, which is being advanced by the feeder, and a conveyor for returning the sheet which has passed through the processing station to the stacking tray.

Abstract: This specification discloses an automatic original conveying device for conveying a supported original to a reading position and discharging the original from the reading position after the surface to be read of the original is read.

Abstract: Disclosed is a variable magnification image formation apparatus wherein an image of an original is formed on a photosensitive member by the use of a zoom lens assembly of the type in which the focal length is changed by rotating a zoom ring about the optical axis and wherein the zoom ring is rotated by wire in synchronism with movement of the zoom lens assembly.

Abstract: An image forming technique employing a screen photosensitive medium having therein a plurality of fine openings. Using such screen photosensitive medium an electrostatic latent image is formed on an electric charge retainable member to be modulated under the action of a modulated corona ion stream. A non-image area can be formed on the member to be modulated by providing an ion stream blocking member between a modulation ion source and the screen photosensitive medium to block the ion stream flowing from the ion source to the screen photosensitive medium at a desired and limited area. The present invention enables to form a very sharp boundary between image area and non-image area.

Abstract: A variable magnification copying apparatus which includes a first shaft having thereon a plurality of gears different in diameter, a second shaft having thereon a plurality of gears different in diameter, the gears of smaller diameters on the second shaft corresponding to the gears of larger diameters on the first shaft, a cam shaft having thereon a plurality of cams corresponding to the pairs of gears on the first and second shafts, a lever biased so as to bear against each of the cams, and a relay gear rotatably supported on each of the levers, and in which the movement of the levers is controlled by intermittent rotation of the cam shaft, the gears on the first shaft are operatively associated with the gears on the second shaft through the relay gears on the controlled levers, and the number of relative rotations of the first and second shafts is varied by the gear ratio of the operatively associated gears, whereby the ratio of the original scanning velocity to the velocity of a photosensitive medium is ch

Abstract: A mechanism for mounting and dismounting a screen-like photosensitive medium having a number of fine openings with respect to an apparatus body. It is known to form a screen-like photosensitive medium into the shape of a drum, but according to the present invention, the photosensitive medium and a gear for driving the photosensitive medium are constructed independently of each other to leave the gear on the apparatus body side, and a device for directing a current applied to the photosensitive medium side is provided inside of the gear with a sliding member interposed therebetween. The side surface of the photosensitive medium which corresponds to the gear is provided with a construction similar to the gear portion, thereby facilitating the mounting and dismounting of the screen-like photosensitive medium with respect to the apparatus body.

Abstract: Apparatus for cleaning an image carrier in an image forming device has a cleaning member, support structure for supporting the cleaning member in such manner as to make the cleaning member contact the image carrier and pressing members engageable with the outer and inner surfaces of the image carrier to grasp it.

Abstract: A cleaning device for removing developer from the surface of a reusable and movable image bearing member comprises a cleaning member which extends transversely of the movement direction of the image bearing member, a device for transporting the removed developer along the transverse direction, a passageway for leading the transported developer to a collecting element, and a rotatable helical member for preventing the deposition of the removed developer on the passageway.

Abstract: A copy magnification modifying apparatus for changing the copy magnification by displacing optical members involved in the image formation to and maintaining the same at a position capable of forming an image of a selected magnification of an original onto a photosensitive member, including a rotary drive source, an optical member displacing mechanism for transmitting the drive force of the rotary drive source through one-directional rotary clutch and resilient member to said optical members thereby guiding the same along a determined path, an optical member stopper for stopping said optical members at a position corresponding to the selected image magnification, and a drive source control system adapted for continuing the function of the rotary drive source after the stopping of the optical members to cause a deformation in a resilient member thereby generating a resilient force biasing the one-directional rotary clutch in a direction opposite to the rotating direction thereof.

Abstract: A cleaning device for removing developer remaining on the surface of an image-bearing member comprises wiper means having a resilient blade member adapted to bear against the surface of the image-bearing member, guide means having a guide member defining, with the resilient blade member, a slit-like opening through which the removed substance from the image-bearing surface is introduced, conveyor means for conveying the collected substance along a conveyance path substantially parallel to the slit-like opening and axially of the image-bearing member, and seal means for sealing the space between the slit-like opening and the conveyance path.

Abstract: This specification discloses a developer treating device for preventing scattering or similar phenomenon of developer in an electrophotographic copying machine. The device is applicable to a developing device, a cleaning device or the like disposed in opposed relationship with the surface of a photosensitive medium to be developed or to be cleaned. In order that the flow of developer may be positively utilized to prevent the same from flowing out of the developing device or the cleaning device, the device has a developer scatter preventing member such as stay or the like which forms a multistage slit between itself and the surface of the photosensitive medium.

Abstract: This specification discloses a copying apparatus in which a first and a second reflector are movable at a velocity ratio of 1:1/2 to scan an image original and the first reflector is displaced by magnification change operation. A movable pulley is provided to a support member for the second reflector. A wire having one end secured in place within the apparatus is passed over the movable pulley and the other end portion thereof is wound on a drive pulley. A support member for the first reflector is secured to the wire between the movable pulley and the drive pulley. The wire is passed over a first pulley displaceable by magnification change operation, between that end of the wire secured in place and the securing point of the wire to the first reflector supporting member. The wire is also passed over a second pulley displaceable by magnification change operation, between the securing point of the wire to the first reflector supporting member and the drive pulley.

Abstract: A slit exposure device of the type in which an original carrier is fixed and an optical system is movable. A driving force transmitting member adapted to move an optical system is passed over output shafts, and rotation of the output shafts causes two groups of optical elements to be reciprocated at a speed ratio of 2 : 1. One of the movable groups of elements requires that an electric cord be connected thereto, wherein one end of the electric cord is fixed, the direction of the cord being changed during movement by means of a rotatable member.

Abstract: A driving device for a moving body comprises a drive shaft normally rotated in one direction by a drive source, a follower shaft in engagement with the drive shaft to transmit the drive to the moving body, one-way connecting means loosely mounted on the drive shaft to connect and disconnect the drive of the drive shaft to the follower shaft, and accumulator means for accumulating the returning force of the moving body by utilizing the movement of the moving body resulting from the normal rotation of the follower shaft. The follower shaft may be reversed in rotation by the accumulator means upon disconnection of the one-way connecting means and the speed of the reverse rotation of the follower shaft is controlled by operation of the one-way connecting means so as not to exceed the driving speed of the drive shaft.

Abstract: A dry developing apparatus equipped with a developer amount detector, includes a container in which the developer is contained, a rotational member for agitating or carrying the developer, a support for supporting the rotational member in such a way that the rotational member, when rotated, is displaceable axially under the force of the load resistance produced by the presence of the developer, a holder for holding the rotational member so as to cause the member to return in the direction opposite to the direction of the displacement when the lead resistance is lessened with decrease of the developer, and a detector for detecting the difference in the amount of the axial displacement of the rotational member.

Abstract: In an electrophotographic copying apparatus of the type in which a toner image is transferred from the surface of a photosensitive medium to a transfer medium, a transfer medium separating device comprises a rotatable separating roller disposed downstream of an image transfer station where a toner image is transferred from the surface of the photosensitive medium to the transfer medium, a transfer medium end guide belt disposed in contact with the peripheral surface of the rotatable separating roller for separating one end of the transfer medium from the surface of the photosensitive medium at the image transfer station and for guiding the transfer medium away from the photosensitive medium after the image transfer, and a rotatable pressure roller disposed in pressure contact with the rotatable separating roller for transporting the transfer medium while urging the same against the rotatable separating roller and for separating the transfer medium from the surface of the photosensitive medium.

Abstract: A developer conveyor device comprises a rotatable photosensitive medium, a developer conveyor member disposed outwardly of the effective width of the photosensitive medium, cleaning means for removing residual developer on the surface of the photosensitive medium, primary conveyor means for guiding the developer removed by the cleaning means to the developer conveyor member, and secondary conveyor means for further guiding the developer from the primary conveyor means into a developer containing portion.

Abstract: A cleaning apparatus for an electrophotographic apparatus comprising an elastic cleaning blade with a holder arranged along a surface of a photosensitive member for cleaning the toners which still remain on the surface of a photosensitive member even after transferring of developed images to a copying paper is finished. The elastic cleaning blade preferably contacts with the surface of the photosensitive member in such a way that the axis of the blade and a tangent to said surface at the pre-cleaning side subtends an obtuse angle specified in relation with the axis line of the blade in the holder. The holder disposes the elastic cleaning blade relative to the photosensitive member to engage a substantially upwardly moving surface portion of the photosensitive member.