Making Copies
The laser copier is an improvement on the inceptive photocopier introduced by the Xerox Company in the 1960s. The indispensable to both machines is the handle of photoconductive counsel, conforming selenium, to create a denial equivalent imaginary entirely of charged particles. Downreaching inside the appliance, an aluminium drum coated with the photoconductor is shielded from any out glassy. As the copying fashion is initiated by a user, an electrical in fashion is passed nailed down the drum, which charges the surface of the photoconductor. The basic commit to paper is produced by a digital scanner that acts somewhat comparable a fax tool. The scanner produces a digital counterpart of the record, stored internally. This digital double is then used to adviser a laser, which fires a petite beam of lambent at the photoconductor in the ornament of the virgin information. In all places the elementary was blank blanched, the laser carves away a room on the photoconductor, which loses its charge when struck by blaze. When the laser has finished its assignment, a replica of charged particles remains that is an exact detrimental figure of the authentic file.The scanner is bare efficient due to it allows multiple pages to be stored digitally for producing collated copies instead of having to manually rescan or Category them as would be expedient with an analog photocopier.
Toner
The crucial ingredient between the charge adverse and the final copy is the ink toner. A very finely powdered ink, toner is attracted to the charged regions of the photoconductor. It is sprayed over the photoconductor and sticks to the charged parts of the image through static electricity, just like hair sticks to the surface of a balloon if they're rubbed together long enough to produce an electric charge. Since the charged parts of the negative represented the dark portions of the original document, the image in toner exactly matches the original.
Getting it on Paper
Once the toner image has been produced, all that's left is to transfer the toner image to a sheet of paper. The paper is ejected from the machine as a new sheet is brought to the toner, which is heated again to produce the transfer. Eventually, when a new copy is ready to be made, the laser comes alive again and sprays the entire surface of the photoconductor, discharging any image that remained and causing any stray toner to fall away. Obviously, powdered ink won't stick to paper the way it does to the charged regions of a photoconductor. But, when heated and exposed to pressure, the granules of toner melt just enough to produce a continuous liquid ink. Just as this occurs, a blank sheet of paper is brought to the toner image by a series of belts and pressed against the toner, producing the final copy.
