Abstract: Copying apparatus for repeated image processing on a copy sheet wherein an image is formed on one surface of a copy sheet, the sheet after which is directed to an image processing station so that an image may be formed on the other surface of the sheet, whereby image processing is repeatedly effected. The apparatus includes a final fixing device for finally completing the fixation of the printed sheet, and an intermediate fixing device for preliminarily effecting pre-fixation of the sheet before the sheet passes through the final fixing device.

Abstract: A device for transferring color toner images of a type, in which a plurality of color toner images are sequentially transferred onto an intermediate image transfer member, and the color toner images thus laid down on the intermediate member are finally transferred in one step onto an image transfer member. The intermediate transfer member is usually set apart from the latent image holding member, and brought into contact with it only at the time of image transfer so as to keep the toner images on the intermediate transfer member in loose layer form, whereby the toner images in a plurality of colors can be transferred onto the image transfer material with good efficiency.

Abstract: A fixing apparatus includes a roller for fixing a toner image formed on a supporting element, a container for receiving an offset preventing liquid and an element for applying the offset preventing liquid on the surface of the roller. The liquid applying element is partially immersed in the offset preventing liquid and it includes a liquid applying member for applying the liquid from the end surface of the member by capillary action, and a member adjacent the end surface to affect the capillary action by squeezing the liquid applying member to control the amount of the liquid applied . Felt is preferably used for the liquid applying member.

Abstract: The present invention is concerned with a copying apparatus of the type which is provided with a reciprocal scanner, and in which copy operation is carried out not only during the forward movement of the scanner but also during the backward movement of the scanner. The copying apparatus herein disclosed has a movable reflector which is interposed in the optical path at the time of forward movement or at the time of backward movement, and stationary reflector for further reflecting the beam coming from the original once reflected by said movable reflector. Said movable and stationary reflector cooperate with each other to invert the original image to be formed on a photosensitive medium at the time of backward movement or forward movement relative to the original image formed at the time of forward movement or backward movement.

Abstract: A copying apparatus functions as a copying apparatus for an original in a form of book and also as a copying apparatus for a sheet original. To this end, the copying apparatus includes a transporting device for a sheet type original and an original table for book type original. The copying apparatus also includes a switching mirror which can move from a first position to a second position. In the first position, the mirror is retracted outside of the optical path for copying the book type original. In the second position, it is interposed in the optical path and forms a new optical path for copying the sheet type original.

Abstract: In the practice of electrophotography using a photosensitive medium having an insulating layer on a photoconductive layer, the surface of the photosensitive medium is uniformly charged with a primary charge. The primary-charged surface of the photosensitive medium is then charged with a charge of the opposite polarity or discharged and simultaneously therewith or therebefore or thereafter, exposed to image light from an original. A grid image is projected upon the surface of the photosensitive medium. For multi-color representation these steps may be repeated in accordance with the number of colors desired.

Abstract: Apparatus for supplying electrophotographic developer to an electrophotographic developing device is disclosed. The developer supply apparatus includes a cartridge containing therein an amount of developer and supported within the housing of the supply apparatus in a manner that the cartridge is allowed to move rotationally and reciprocally around and along its axis. The cartridge has an opening at its one end and also a plural number of ribs provided within the cartridge. During the movement of the cartridge, the ribs stir the developer contained in the cartridge and also cause the developer to move toward the opening. The cartridge is brought into motion responding to a supply signal so as to effect a supply of developer from the cartridge to the developing device.

Abstract: A copying apparatus having a changeable copying magnification is provided with focusing lens means having a variable focal length positionally fixed as a whole, and optical path length changing means for increasing or reducing the length of the optical path before or behind the focusing lens. An original to be copied and a photosensitive medium are selectively brought into one of a conjugate relationship for forming a life-size image and a conjugate relationship for forming a reduced or a magnified image. Desirably, the optical path length changing means displaces the optic axis in order to register one side edge of the image at different magnifications to a predetermined position on the photosensitive medium.

Abstract: In a copying apparatus, a sheet original exposure unit is provided which has an exposure window for exposing a sheet original therethrough, and a transport device for transporting the sheet original through the exposure window. The exposure window and the transport device are rotatable together. Optical elements are provided including a lens and mirrors for projecting the image of the sheet original upon a photosensitive medium, and a driving mechanism is provided which utilizes the rotation of the sheet original exposure unit to drive the transport device in the opposite direction so as to enable the back side of the sheet original to be exposed.

Abstract: A photographic copying apparatus of the type in which a copy is guided through a hermetically sealed drying chamber disposed behind a developing liquid tank so that the copy may be dried by heat produced in the drying chamber is improved in that at least one heating plate is provided for guiding the copy thereon.

Abstract: In a transfer-fixing device for transferring a developed image from an image carrier onto a transfer medium, there is provided urge means for urging the transfer medium against the image carrier, and heating means disposed adjacent the urge means for heating the urge means substantially at the same time that the transfer medium is urged against the image carrier.

Abstract: A copying apparatus in which thin or thick originals such as individual sheets or thick books are selectively driven over an illumination slit aperture, characterized by a transparent book support such as a glass plate connected to a known transport mechanism for individual sheets such as a pair of transport rolls. The book support is located on the extension of the transport mechanism, and the transport mechanism and the book support are selectively movable together.