What is inkjet printer,deskjet printer,Laser printer and Dot matrix printers.

What is inkjet printer,deskjet printer,Laser printer and Dot matrix printers.

A device that prints images (numbers,alphabet,or graphs) on paper is known as printer.After creating a document on the computer,you acn send it to the printer for printing its hard copy, which is generally called a printout.The speed of a printer is rated by either pages per minute(PPM) or charecters per seconds(CPS).You can take the printouts in either full colors or black color.Printers ,which can print in full colors, are expensive.Different types of printer are given as follows:

• Dot Matrix Printers:Refer to a printer that uses pins and inks soaked ribbon.A dot matrix printer makes use of pins instead os hammer.The pins strike an ink ribon.As each pin hit the ink ribbon,a dot appears on the paper, and combinations of dots form character and illustrations.A dot matrix printer can print 1 to 18 pages in one minute.
• Inkjet printers:Refers to a printer that sprays ink on the sheet of paper.The printer sprays little droplets of color in a pattern on the paper at a very fast speed.These tiny droplets form the character or image on the paper.Ink-jet printers produce high-quality text and graphs .An inkhet printer can print 4 to 6 pages in one minute.Now a days,Inkjet printers also produce photostat copy of any image or document .
  
• Laser Printer:Refers to a type of printers ,which use a laser beam and rolling drum to produce a high quality printout .At the time of printing the laser beam creates a pattern of imagesand letters on the rolling drum.The pattern of images or letters is known as image of the document.After the image of document is formed,the printer spreade black powder(known as toner) on drum.The paper coming from the tray of the printer passes through the rolling drum and an image of the document appears on the paper.Before the paper comesout of laser printer,it passes through a set of heated rollers(known as fuser)which firmly paste the powder on the paper.