Abstract: A multiple chip Led linear array including 2048 elements is achieved by a unique wafer dicing technique which allows LEDs in abutting chips to be separated by the same distance as adjacent elements on a single chip. The linear array is employed in photocopy apparatus to discharge a linear segment of a photosensitive drum.

Abstract: An electrographic printer/copier includes a paper path which is easily accessed from the top of the machine and permits copies to be collated automatically. The machine includes a paper tray which adjusts to organize successive pages into related reports.

Abstract: A self-contained photoconductive belt assembly for a printer or a copier is disclosed. The self-contained photoconductive belt assembly is in the form of a cartridge or cassette, comprising a frame, first and second parallel rollers within the frame, and an endless photoconductive belt looped about and rotating with the rollers. The cassette also includes a charging unit and mounting means for detachably mounting the cassette within the printer or cassette. Desirably, the cassette also contains a photosensor for detecting the seam in the photoconductive belt. Desirably also, the cassette is slidably mounted within the housing of the printer or copier in a vertical orientation.

Abstract: A developer unit for use in connection with an electrophotographic printer is disclosed. Toner is provided to the developer unit by means of a disposable cartridge so that maintenance requirements are significantly reduced. The developer includes a sensing circuit which measures the inductance of the toner/carrier mix and controls the rate at which toner is introduced into the toner carrier mix.

Abstract: A developing apparatus develops an electrostatic latent image formed on the surface of an image retaining member into a visible image by the use of a developer including a magnetic carrier and a toner. The developing apparatus includes a rotatable non-magnetic sleeve retaining the developer, a permanent magnet member disposed in the non-magnetic sleeve and having a plurality of magnetic poles, a developer tank containing the developer, a toner tank containing the toner and having a toner outlet communicating with the developer tank and further having a toner replenishing movable member at the outlet, and a developer mixing movable member installed inside the developer tank. In the developer tank, a predetermined amount of the developer is contained which has previously been adjusted to a predetermined toner density. Further, the developing apparatus is constructed such that the whole of the developing apparatus is abandoned after the magnetic carrier has reached the end of its predetermined life.