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We know laser printing best because we invented it. Specifically, Gary Starkweather invented the laser printer in 1969 at the Xerox research lab in Webster, New York.
Xerox PARC Scanning Laser Output Terminal (SLOT)

Gary Starkweather prototyped the first laser printer by modifying a standard Xerox office copier. It printed 60 pages a minute at 500 dots per inch. It took almost five years to produce a commercial version: the huge, expensive 9700.

A laser printer is a popular type of computer printer that uses a non-impact photocopier technology where there are no keys striking the paper. When a document is sent to the printer, a laser beam “draws” the document on a selenium-coated drum using electrical charges.
The Apple LaserWriter was the first laser printer available to the mass market. The Apple LaserWriter with its built-in Adobe Postscript page description software was one of the key elements in the desktop publishing (DTP) revolution.
The First Printer

The first computer printer designed was a mechanically driven apparatus by Charles Babbage for his Difference Engine in the 19th century. The Difference Engine is an automatic mechanical calculator that was invented to produce error-free tables, which was a complicated process to do by hand.

The first laser printer was introduced by Gary Starkweather, a product development engineer at Xerox. He came up with the idea of employing a laser beam to “draw” a picture of what was to be duplicated directly onto the copier drum in 1969.
Laser printers are printers that use electrophotographic technology. First, data sent from a PC is converted into printing data by a print engine. The print command is converted into laser light, which is irradiated (exposed) onto a cylindrical photosensitive drum.
Laser printers can print much faster than inkjet printers can. Most are equipped with high-capacity paper trays, so they can print more pages at a given time. They`re also built to handle the printing of thousands of pages per month without succumbing to wear-and-tear.
Laser printers use toner powder instead of dye or pigment-based ink. Laser printers produce electrostatically charged dots on a light-sensitive drum which attracts toner powder. The toner is transferred to the paper and fixed by a heating process. Laser printers deliver crisp black and white and brilliant color prints.
Laser techniques include laser vaporization, laser resection-enucleation, and coagulation.
The three characteristics of laser are: Superior Monochromatism: Laser lights are single wavelength light. Superior Directivity: Laser beam is emitted in a specific direction. Superior Coherence: Laser lights have the same phase difference.
Theodore Maiman developed the first working laser at Hughes Research Lab in 1960, and his paper describing the operation of the first laser was published in Nature three months later. Since then, more than 55,000 patents involving the laser have been granted in the United States.
Goldsmith and inventor Johannes Gutenberg was a political exile from Mainz, Germany when he began experimenting with printing in Strasbourg, France in 1440. He returned to Mainz several years later and by 1450, had a printing machine perfected and ready to use commercially: The Gutenberg press.
Sandile Ngcobo, the Council for Scientific and Industrial Research (CSIR) scientist responsible for developing the world`s first digital laser, gave what is probably the shortest speech in the history of press briefings at the announcement of the breakthrough this week.

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