Laser Printer Drum

Laser Printer Drum

How Laser Printers Work

A laser printer is one of the most common printers used today, especially within businesses small and large due to its capability to rapidly produce high quality text and graphics. But while you know what a laser printer is, do you know how it actually works? There are a few basic scientific principles behind the laser printing process and they explain the great advantages to using a laser printer.

A laser printer obviously uses a laser to print, but how does it get the image on a sheet of paper? Laser printers use the process of electro photography whose primary principle at work is static electricity. Since oppositely charged atoms are attracted to each other, objects with opposite static electricity will cling together. Laser printers use a revolving drum, or photoreceptor, made out of highly photoconductive material that is discharged by light photons. The photoconductor, a photosensitive surface, is uniformly charged by a wire with an electrical current running through it, called the charge corona wire, with static electricity. The printer then beams a laser across the surface of the drum and projects an image of the page to discharge certain points. The laser is essentially "drawing" the letters and images to be printed as a pattern of electrical charges.

Afterwards, the toner, a fine powder, is spread over the surface of the drum and only adheres to the charged areas, which is how the latent design or image becomes visible. Next, the sheet of paper rolls along a belt and is given a negative charge by the corona wire. The paper is charged opposite to the toner since the toner has a positive charge. With the toner powder affixed, the drum rolls over a sheet of paper. The negative charge of the paper is strong enough to pull the toner pattern away. Also, since the paper and the drum move at the same speed, the image pattern is picked up exactly as it was "written." In order to keep the paper from clinging to the drum, it is discharged by the detac corona wire right after picking up the toner.

To permanently fix the transferred image to the paper, the toner is fused with pressure and heat. To do this the paper is quickly passed through the fuser, which is a pair of heated rollers. The printer then cleans all of the excess toner and electrostatic charges from the photoconductor to make it ready for the next print job. The printer cleans itself through the heat actually melting loose toner powder away and by passing the paper through the discharge lamp which exposes the entire photoreceptor thereby erasing the electrical image. After these steps, the paper then rolls out onto the output tray ready for pick up.

Due to the unique method of exposition and formation, laser printers and color laser printers have many significant advantages over other types of printers. Laser printers offer the best print quality and highest resolution and have the ability to print up to 200 monochrome pages per minute. Laser printer speed depends upon the printer model and the graphic intensity of the job being printed. However, the bottom line is that laser printers are much faster than inkjet printers due to their unique process. This makes them ideal for users with heavy printing needs, whether they are monochrome text documents or multiple-page documents loaded with text, charts and images.

The first commercial implementation of a laser printer was by IBM with the model 3800 in 1976, but the first mass market laser printer was through the combined efforts of HP and Canon. While HP printers and Canon printers were first to the laser printer consumer market, Brother printers, IBM printers and others quickly followed and overtime dropped significantly in price.

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Okidata Laser Printer Drum for Okidata Okipage 14E 14EX 14I 41331601 $170.89 Okidata Laser Printer Drum for Okidata Okipage 14E 14EX 14I 41331601

Lexmark Laser Printer Drum Photoconductor For Lexmark Optra SC 1361750 by Lexmark $47.01 Lexmark Laser Printer Drum Photoconductor For Lexmark Optra SC 1361750 by Lexmark

Okidata Laser Printer Drum for Okidata Okipage 10E/10EX/10I/10X12I 40433305 $176.45 Okidata Laser Printer Drum for Okidata Okipage 10E/10EX/10I/10X12I 40433305

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Samsung Laser Toner Cartridge/Drum Unit for Samsung ML 1610 Laser Printer , 2000 pgs. Each $79.03 Manufacturer: Samsung. Each. Laser Printer Supplies for Samsung Printers Toner/Drum Cartridge For printer models ML-1610. 2K Black Customers also search for: Cartridge;Laser;Laser Printer;Laser Printer Supplies;Laser Supplies/Toner;Laser Toner;Printer Sup

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Xerox Drum Cartridge For WorkCentre 4150 Printer $285.99 013R00623 Drum Cartridge For WorkCentre 4150 Printer Imaging Drum Laser Xerox Xerox Corporation www.xerox.com

Rhinotek Laser Imaging Drum - Black $56.99 30000 Page 310-7021-RD Lexmark Optra E230 Printer Dell Printers: 1700 1710 Black Imaging Drum Imaging Drum Kit Laser Rhinotek www.rhinotek.com

Konica Minolta Magenta Drum For magicolor 7450 Printer $182.99 30000 Page 4062413 Konica Minolta magicolor 7450 Printer Imaging Drum Konica Minolta Laser Magenta Magenta Drum For magicolor 7450 Printer www.konicaminolta.us

Ricoh Type 204 Drum For AC204 Printer $95.99 15000 Page 411879 Ricoh AC204 Printer Imaging Drum Laser Ricoh Ricoh Company, Ltd Type 204 Drum For AC204 Printer www.ricoh-usa.com

Replacement Drum Unit to replace Dell W5389 Laser Drum Cartridge for Dell 1700 & 1710n Laser printer $39.99 Replacement Dell 1700 1710n Black Laser Drum Cartridge

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Refurbished Alternative for Dell 310-5404 (W5389) Laser Drum Cartridge for your Dell 1700/1700n Laser printer $59.99 Save money with the Remanufactured Alternative Cartridge to replace Dell 310-5404, 3105404, W5389 Laser Drum Cartridge compatible with your Dell 1700, 1700n Laser printer.

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Replacement CLT-R409 Laser Drum Cartridge for use in Samsung CLP-315 & CLX-3175 Printers $99.99 Replacement CLT-R409 Laser Drum Cartridge for Samsung CLP-315 Printer

Genuine Dell 3000cn/3100cn Color Laser Printer Drum Unit $200 Genuine Dell M5065 drum unit is used in the 3000cn and 3100cn Color Laser Printers. This drum unit works with K5362, G7029, G7030, G7028 toner cartridges.

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