First person who made the printer was Chester Carlson. Chester Carlson was born on February 8,1906 and died on September 19,1968. He studied in California Institute of Technology, New York Law School, Riverside City College and spent his life for 14 years. When he finished his career, he thought that he wanted to invent which will make our life easier. Then he thought that he is going to make a machine printer. He invented the first printer called Xerox which uses dried printing method. Xerox became the base of laser printers’ technology that followed.
Impact printers
An impact printer makes contact with the paper. It usually forms the print image by pressing an inked ribbon against the paper using a hammer or pins. Following are some examples of impact printers.
Dot-Matrix Printers
The dot-matrix printer uses print heads containing from 9 to 24 pins. These pins produce patterns of dots on the paper to form the individual characters.
Line printers
In business where enormous amount of material are printed, the character-at-a-time printers are too slow; therefore, these users need line-at-a-time printers.
Drum printer
A drum printer consists of a solid, cylindrical drum that has raised characters in bands on its surface. The number of print positions across the drum equals the number available on the page.
Chain printers
A chain printer uses a chain of print characters wrapped around two pulleys. Like the drum printer, there is one hammer for each print position.
Non-impact printers
Non-impact printers do not use a striking device to produce characters on the paper; and because these printers do not hammer against the paper they are much quieter. Following are some non-impacted printers.
Ink-jet printers
Ink-jet printers work in the same fashion as dot-matrix printers in the form images or characters with little dots.
Laser printers
A laser printer works like a photocopy machine. Laser printers produce images on paper by directing a laser beam at a mirror which bounces the beam onto a drum.
