In 1938 the American physicist and inventor Chester Carlson (1906-1968) (start to see the nearby image) invented a dried out printing process, known as later Xerography (the word originates from the Greek for dry writing), the building blocks technology for copiers and laser printers to arrive. Carlson applied for patent in 1939 and in 1942…
A laser printer is a favorite type of personal computer printer that runs on the non-impression (keys don’t strike the paper), photocopier technology. Whenever a document is sent to the printer, a laser beam “draws” the document on a selenium-coated drum applying electrical charges. After the drum is charged, it really is rolled in toner,…
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