How Does the Laser Printer Work

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  • How Does the Laser Printer Work

    1. 1. How Does the Laser Printer Work? By Kalina Kourdova
    2. 2. Components of The Laser Printer <ul><li>Static Electricity </li></ul><ul><li>Drum </li></ul><ul><li>Toner </li></ul><ul><li>Fuser </li></ul><ul><li>Printer Controller </li></ul>
    3. 3. Getting The Data <ul><li>The printer controller “communicates” with the computer through communication port </li></ul><ul><li>It can be either parallel port or USB </li></ul><ul><li>The data is transferred to the </li></ul><ul><li>printer and it decides how to </li></ul><ul><li>arrange it on paper </li></ul>
    4. 4. Language <ul><li>The printer and the computer need </li></ul><ul><li>to speak the same page description language </li></ul><ul><li>Most commonly met nowadays is Printer Command Language (PCL) </li></ul>
    5. 5. Arranging The Page <ul><li>The printer controller determines the margins and word and graph place </li></ul><ul><li>The raster image processor (RIP) breaks the data into pieces </li></ul><ul><li>Data is saved in printer’s memory </li></ul><ul><li>This enables consequent copying of files </li></ul>
    6. 6. Writing The Data On The Drum <ul><li>The data is written on the </li></ul><ul><li>drum by laser scanning </li></ul><ul><li>The laser assembly , including laser, mirror and lens, moves the beam that </li></ul><ul><li>changes the electrical charge on the places where ink should be put </li></ul>
    7. 7. Getting The Paper <ul><li>The feed rollers of the printer </li></ul><ul><li>grasp the paper and pull it </li></ul><ul><li>This and the toner pickup </li></ul><ul><li>occur almost at the same time </li></ul>
    8. 8. The Toner <ul><li>First, the electrostatic image is created </li></ul><ul><li>by changing the charges on different places </li></ul><ul><li>The drum continues to revolve and </li></ul><ul><li>the toner sticks to the negatively </li></ul><ul><li>charged places of the text </li></ul>
    9. 9. The Fuser <ul><li>A pair of heated rollers </li></ul><ul><li>Their temperature can reach 355 degrees Fahrenheit, which makes the papers that go out of it hot </li></ul><ul><li>When the paper goes through the </li></ul><ul><li>fuser, the toner melts on it </li></ul>
    10. 10. Problems That Might Occur <ul><li>Vertical white areas or gray mist </li></ul><ul><li>Horizontal black lines </li></ul><ul><li>Printing in gray color instead of </li></ul><ul><li>black (this means the toner is </li></ul><ul><li>about to finish) </li></ul>
    11. 11. Health Hazards <ul><li>When using laser printer certain gases </li></ul><ul><li>like ozone, nitrogen oxide and carbon monoxide that can affect human health, are produced </li></ul><ul><li>Ultraviolet light can cause eye damage </li></ul>
    12. 12. Summary <ul><li>The laser printer is one of </li></ul><ul><li>the most widespread devices nowadays </li></ul><ul><li>Even though it is very often </li></ul><ul><li>used, it hides some health risks </li></ul><ul><li>Only a few people know the </li></ul><ul><li>way it works </li></ul>
    13. 13. Works Cited <ul><li>Grammatis, Yannis. &quot;How does a laser printer work?&quot; Information System . 5 Feb.      2005. 29 May 2008 <http://www.chaminade.org/MIS/Articles/      HowLaserPrintersWork.htm>. </li></ul><ul><li>Harris, Tom. How Laser Printer Works . 29 May 2008      <http://computer.howstuffworks.com/laser-printer2.htm>. </li></ul><ul><li>&quot;Photocopier or Laser Printer Hazards.&quot; The London hazards Center Factsheet .      Dec. 2002. 29 May 2008 <http://www.lhc.org.uk/members/pubs/factsht/      76fact.pdf>. </li></ul><ul><li>http://www.mrgadget.com.au/catalog/images/Canon_Pixma_MP800_Multi-Functional_Printer2.jpg </li></ul><ul><li>http://techtaxi.blogspot.com/2007/10/samsung-scx-4500-multifunction-laser.html&h=353&w=382&sz=17&hl=en&start=29&tbnid=53QONgfgU-u8SM:&tbnh=114&tbnw=123&prev=/images%3Fq%3Dlaser%2Bprinter%26start%3D18%26gbv%3D2%26ndsp%3D18%26hl%3Den%26sa%3DN </li></ul><ul><li>http://www.global-b2b-network.com/direct/dbimage/50334056/Toner_Cartridge.jpg </li></ul><ul><li>http://computer.howstuffworks.com/laser-printer3.htm </li></ul><ul><li>http://computer.howstuffworks.com/laser-printer7.htm </li></ul><ul><li>http://www.whiteseis.com/Images/printer.jpg </li></ul><ul><li>http://www.keyghost.com/usb%20keylogger/KeyGhost-USB-512KB-Plugs.jpg </li></ul><ul><li>http://pcl.to/unicode/autoclick.png </li></ul><ul><li>http://computer.howstuffworks.com/laser-printer1.htm </li></ul><ul><li>http://www.crunchgear.com/wp-content/uploads/2008/02/hanging_printer.jpg </li></ul><ul><li>http://computer.howstuffworks.com/laser-printer10.htm </li></ul>

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