Showing posts with label Printer. Show all posts
Showing posts with label Printer. Show all posts

Monday, March 20, 2017

Printer

Printers are Output devices used to prepare permanent Output devices on paper. 
  • Device that prints text and graphics in the same format and shape which is displayed on the screen connected via printer cable or USB cable.
  • Transforms digitally stored documents, graphics, text data on paper/hard copy.
  • Speed of printer is measured in printed pages per minute.
  • Printers can be shared in the LAN, Wireless networks or Ethernets.
  • New types of printers are combined with printing, scanning and fax in a single unit.
Printers can be divided into two main categories :
Impact Printers : In this hammers or pins strike against a ribbon and paper to print the text. This mechanism is known as electro-mechanical mechanism. They are of two types.
 
 
(i) Character Printer
(ii) Line Printer
Character Printer : It prints only one character at a time. It has relatively slower speed. Eg. Of them are Dot matrix printers. 
Line Printer : It prints one complete line at a time. Eg. Of them are Drum printers. 

Non-Impact Printers : There printers use non-Impact technology such as ink-jet or laser technology. There printers provide better quality of O/P at higher speed. These printers are of two types :