Cobra Printer Contact tech support phone number to call Wireless printer and printers customer service telephone help center helpline desk technical HelpDesk on 1800 1 800 tollfree toll-free to USA CANADA chat live person.
A printer Call customer service phonenumber is tocontact printers care tech support help center helpline desk technical HelpDeskusacanadalive chat 1800 1 800 tollfree toll?free telephone Email person 24×7 hour.Printer is a common type of computer printer that rapidly produces high quality text and graphics on plain paper. As with digital photocopiers and multifunction printers (MFPs), printers employ a xerographic printing process but differ from analog photocopiers in that the image is produced by the direct scanning of a laser beam across the printer’s photoreceptor.
The cost of this technology depends on a combination of factors, including the cost of paper, toner, and infrequent drum replacement, as well as the replacement of other consumables such as the fuser assembly and transfer assembly. Often printers with soft plastic drums can have a very high cost of ownership that does not become apparent until the drum requires replacement.
In comparison with the printer, most inkjet printers and dot-matrix printers simply take an incoming stream of data and directly imprint it in a slow lurching process that may include pauses as the printer waits for more data. A printer is unable to work this way because such a large amount of data needs to output to the printing device in a rapid, continuous process. The printer cannot stop the mechanism precisely enough to wait until more data arrives, without creating a visible gap or misalignment of the dots on the printed page.
The first printer designed for use in an office setting was released with the Xerox Star 8010 in 1981. Although it was innovative, the Star was an expensive ($17,000) system that was purchased by only a relatively small number of businesses and institutions. After personal computers became more widespread, the first printer intended for a mass market was the HP LaserJet 8ppm, released in 1984, using a Canon engine controlled by HP software. The HP LaserJet printer was quickly followed by printers from Brother Industries, IBM, and others. First-generation machines had large photosensitive drums, of circumference greater than the paper length. Once faster-recovery coatings were developed, the drums could touch the paper multiple times in a pass, and could therefore be smaller in diameter.
How it works
Raster image processing
Each horizontal strip of dots across the page is known as a raster line or scan line. Creating the image to be printed is done by aRaster Image Processor (RIP), typically built into the printer. The source material may be encoded in any number of special page description languages such as Adobe PostScript (PS), HP Printer Command Language (PCL), or Microsoft XML Page Specification (XPS), as well as unformatted text-only data. The RIP uses the page description language to generate a bitmap of the final page in the raster memory. Once the entire page has been rendered in raster memory, the printer is ready to begin the process of sending the rasterized stream of dots to the paper in a continuous stream.
The first Hewlett Packard LaserJet only had 128 kilobytes of memory. It typically was used to print text only, and did not operate like modern graphical printers. The page character information was stored in only a few kilobytes, and during printing the actual dot patterns for each raster scan line was looked up in font bitmap tables stored in Read Only Memory (ROM). Additional fonts were stored on ROM cartridges, plugged into expansion slots.
Printers capable of tabloid and larger size may include memory expansion slots. If insufficient memory is available, some features may be disabled, such as being able to print in colour at letter size but only capable of monochrome at tabloid size. Purchasing additional memory may permit printing in colour at the larger size.
Cobra Printers Contact tech support phone number to call Wireless printer and printers customer service telephone help center helpline desk technical HelpDesk on 1800 1 800 tollfree toll-free to USA CANADA chat live person.