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Duplicating machines
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===How digital duplicators work=== Like the mimeo machine, digital duplicators have a stencil (called a master), ink, and drum—but the process is all automated. # The original is placed on a flat bed scanner or fed through a sheet feed scanner, depending on the model. # When the start button is pressed, the image is scanned into memory by reflecting light off the original and into a [[charge-coupled device|CCD]]. # The image is burned onto the master material that is coated or laminated on one side, in a series of small holes by the thermal print head. # As the new master is burning it is stored while the old master is removed. # There is a clamp plate on the drum that opens by motor. The drum turns and the old master material is fed into the disposal rollers and into the disposal box. # The new master is fed into the clamp which closes, then the drum is turned, pulling the master onto the drum. # The outside of the drum is covered in screens and the inside is coated in ink. The screens make sure the ink flow is regulated. # The paper is fed to the drum, and the ink only comes through the master material where there are holes. # A pressure roller presses the paper to the drum and transfers the ink to the paper to form the image. # The paper then exits the machine into an exit tray. The ink is still wet.
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