The copying machine includes both line and frame exposing means for a photoelectrostatic member and controls for conditioning the machine to operate in one of these two modes. A movable charging assembly is positioned in different locations in the two modes by the control, and other factors such as charging voltage, speed of movement of the member, and the continuous or intermittent nature of the charging operation are changed by the control in accordance with the copying mode for which the machine is conditioned.
This is a continuation of Pat. application Ser. No. 736,237, filed Mar. 11, 1968, which is a division of Pat. application Ser. No. 475,522, filed July 28, 1965 now U.S. Pat. No. 3,397,628.
Photocopying apparatus includes a magnetic brush for applying toner to a copy sheet having a photoconductive coating. The apparatus also includes an illuminating station for receiving a document having an image thereon, a lens system for projecting the illuminated document image, a corona charger unit for placing a uniform electrostatic charge on the photoconductive coating of the copy sheet and an imaging station for simultaneously receiving the projected document image and the uniformly electrostatically charged copy sheet. The imaging station includes a conductive ground plate effective to allow discharge of selected areas on the copy sheet when struck by the projected image to form a latent electrostatic image in accordance with the document image. The magnetic brush places a uniform layer of magnetically and electrically responsive particulate toner material in contact with a surface moved past a magnetic brush peripheral surface. A copy sheet feed mechanism, that defines a generally C-shaped path to permit the compact design of this photocopying apparatus, feeds the copy sheet from a supply with the conductive coating facing downwardly, sequentially to the corona charger unit, the imaging station, and then under the magnetic brush with the copy sheet photoconductive coating facing upwardly so that toner carried on the bottom peripheral surface of the magnetic brush assembly is deposited on the upwardly facing charged areas of the copy sheet.
Disclosed is an apparatus for feeding a sheet of copy paper to the photoconductive drum in a photocopier machine. The apparatus includes sheet separating means, sheet feeding means and drive means alternately disposed between one of two positions for successively causing sheet separation and feeding of a sheet of copy paper from a stack to a registration position synchronized with a developed image rotatably carried on the photoconductive drum. The apparatus also includes an actuating linkage arrangement for effecting one of two positions of the drive means, through motion caused by cams attached to the reciprocating original document carriage.
Electrophotographic copying apparatus comprising a body proper and a copy paper transporting unit which can be slidably withdrawn from the body proper in the feeding direction of the copy paper. The transporting unit houses the entire path of the copy paper, thus permitting easy removal of jammed paper from the apparatus upon withdrawal of the transporting unit from the body proper.
An electrophotographic copying machine includes a photosensitive drum on which an electrostatic latent image is formed, a developing apparatus for developing the electrostatic latent image into a toner image, a transferring apparatus for transferring the toner image to a copy paper supplied from a paper supplying portion, a fixing apparatus for heating the copy paper having the toner image transferred thereto to fix the toner image, and a paper ejecting roller for ejecting the copy paper having the toner image fixed thereto to the exterior of the machine body. The copying machine elements are arranged so that the copy paper transporting path from the paper supplying portion to the paper ejecting portion is divided into two assembly units, the assembly units which can be removed from respective predetermined attached positions toward the exterior of the copying machine body in a direction opposite from each other and parallel to the transporting direction of the copy paper.