Abstract: A copying apparatus has a rotatable medium, processing apparatus including a charger for forming an image of an original on the rotatable medium and for transferring the image to a transfer material, a residual charge remover, a copy setting mechanism and a start switch. The rotatable medium is rotated during the copying operation with both the charger and residual charge remover operating and is post rotated after the copying operation with the charger disabled but the residual charge remover operating. When the start switch is operated during the post-rotation but before the charger becomes disabled, the charger remains operative and copying is restarted.

Abstract: In a copying apparatus, a mode change-over mirror is selectively displaced between its retracted position and its operative position, whereby the copying mode is selectively changed over to a first mode and a second mode. The operative position is set at at least two places. When the mode change-over mirror lies at a first operative position, second mode copying at a first magnification is effected and when the mode change-over mirror lies at a second operative position, second mode copying at a second magnification is effected.

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: An image forming device has a photosensitive member upon which a latent image is formed and then developed into a visible image and device for heating said photosensitive member.

Abstract: Apparatus for printing reproduction copies of an original image or recording such original image on an image recording member, is provided with a device for determining whether the image to be recorded conforms in size to the image recording member. The apparatus provides an indication to the operator of the apparatus when non-conformance is detected.

Abstract: In a copying device for selectively copying sheet originals and thicker originals, the thicker originals being copied while positioned on a reciprocating original carriage. In one mode of copying thick originals, the original carriage is reciprocated one time for each rotation of the photosensitive drum while in another mode each reciprocation corresponds to two rotations of the drum. In one mode of copying sheet originals the photosensitive drum rotates once for each copy while in another mode a plurality of copies are formed for each rotation. The copying device has a control system for detecting the position of the reciprocating carriage and for controlling the forward and reverse movement of the carriage as a function of the size of the original being copied as well as the position of the carriage.

Abstract: This invention discloses a copier capable of reduction and/or enlarged copying as well as real-size copying, said copier providing, along an edge of the copying sheet, a non-imaging portion of a determined width in which no image is recorded. In the real-size copying, therefore, a portion of original an corresponding to said non-imaging portion is not recorded. In the reduction or enlarged copying, however, the image of the original is formed at an area other than said non-imaging portion to obtain a copy without such incomplete image.

Abstract: A scanning apparatus includes a scanner, a driver for reciprocating the scanner, and a control mechanism which controls the drive force of said driver so as to drive the scanner with a low acceleration at the initial stage of drive of the scanner.

Abstract: There is disclosed an electrophotographic method and device for forming copies utilizing a reciprocating member movable for scanning an original document positioned thereon to form a latent image on a rotatable photosensitive medium. Transfer material is fed in response to a feed signal produced by the reciprocating member in accordance with movement thereof. In one mode of operation, the photosensitive medium completes at least two rotations for each reciprocation of the reciprocating member.

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: A control device for driver member comprises an intermittently movable driver member, a follower member adapted to follow the driver member for displacement, retention and return displacement, a control member for controlling the starting and stoppage of the movement of the driver member, and a first and a second signal for starting the movement of the driver member. The movement of the driver member may be started by the first signal to displace the follower member to bring about the retaining position, whereafter the movement of the driver member may be automatically stopped by the control member, and the movement of the driver member may be restarted by the second signal and at the position whereat the return displacement of the follower member is completed, the movement of the driver member may be automatically stopped by the control member.

Abstract: A copying apparatus having an optical system comprising a fixed original carriage, a rotatable mirror for scanning the original carriage and an image forming optical system for imaging a light flux from the rotatable mirror on a photosensitive medium, said image forming optical system being provided with a swing and tilting lens system having a swing and tilting function and a light path length correcting lens system including at least two movable lens groups movable along the direction of the optic axis and having the function of correcting the length of the light path while maintaining a predetermined image forming magnification, said swing and tilting lens system and said movable lens groups being moved in synchronism with said rotatable mirror to thereby form the image of the original on the photosensitive medium without swing and tilting.

Abstract: An image forming device having a rotatable medium, a latent image forming device for forming a latent image on the rotatable medium, apparatus for applying liquid developer to the latent image to form a toner image, apparatus to transfer the toner image to transfer material and a cleaning apparatus for cleaning the rotatable medium after transfer. The device is operated so that there is an initial application of developer to the cleaning apparatus to loosen any dried toner after which the rotatable medium undergoes a prerotation of at least one half of a complete rotation before image formation is begun. After termination of an image forming operation, the rotatable medium is rotated for a predetermined time to clean its surface and then stopped.

Abstract: A method and apparatus for producing electrophotographic copies, wherein a rotatable photosensitive medium is rotated and pre-cleaned prior to image formation on the cleaned portion and wherein the entire medium is cleaned upon the completion of image formation.

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: In an electrophotographic copying apparatus of the liquid development and transfer type, a liquid developing device includes a photosensitive drum, an arcuate developing electrode disposed below the photosensitive drum in opposed relationship therewith, and spacers disposed at the opposite ends of the developing electrode to maintain a predetermined clearance between the developing electrode and the photosensitive drum. Developing liquid may be supplied into the clearance to develop an electrostatic latent image on the photosensitive drum.

Abstract: A variable magnification copying apparatus includes optical scanning means for scanning an image original at a variable velocity in accordance with a copying magnification desired, a photosensitive drum movable at a predetermined velocity from an exposure station to an image transfer station, conveyor means for conveying copy medium to the image transfer station, detector means for generating a signal when the scanning means has scanned an edge of the image original or a portion thereof near the edge, and control means coupled to the detector means for controlling the conveyor means by the signal so as to ensure the image of the original to be copied with the leading edge thereof registered to the leading edge of the copy medium with respect to the direction of conveyance, irrespective of changes in magnification.

Abstract: A feeding device comprises a plurality of cassettes capable of supporting thereon copy mediums, a cassette cradle for holding the cassettes in an operatively associated relationship with one another, feed means for feeding the copy mediums, control means for controlling the feed means to intermittently feed the copy mediums, and means for selectively displacing the cassette cradle to at least two positions to selectively locate at least one of the cassettes at a position where it may be acted on by the feed means, whereby copy mediums may be fed from one of the cassettes.

Abstract: A counting device including a click wheel operative integrally with a dial for setting the number of repetitive operations, the click wheel having teeth therearound, the number of which corresponds to the number of the repetitive operations; a ratchet wheel having a projection, the ratchet wheel being rotated to a starting position thereof by rotation of the click wheel; a feeding pawl for feeding the ratchet wheel in response to an external signal for every operation; a preventing structure for preventing the ratchet wheel from returning by pressure contact or engagement; and a start button integrally formed with a center shaft and a rotation preventing member of the center shaft, the start button being locked by the preventing structure for said ratchet wheel, and the rotation preventing member being engageable with the preventing structure; the engagement between the rotation preventing member and the preventing structure changing to open a switch as soon as the projection of the ratchet wheel releases the

Abstract: A copying machine capable of copying either bulky originals or sheet originals. The machine includes a bulky original holder and sheet original feeder having a sheet original exposure section arranged at a position sufficiently spaced apart from the bulky original holder so that it does not interfere with the operation of the bulky original holder. A bulky original scanning device includes at least two movable mirrors, one of which is moved out of the optical path to form an optical path for scanning the sheet original.