Printer- Printer is an output device that can help us to print symbols, characters, and also use for some graphic purpose. From printer we got the hard copy. It is basically accept text and graphics output from a computer system and transfers them on to the the paper that is called hard copy. The main printer qualities are color, resolution, speed, memory . There is a figure that shows the laser jet printer.
There are two type of printers Impact and Non- Impact printer.
Impact printer- An Impact printer has mechanism to make contact with the paper. It forms characters or images by striking a mechanism such as pressing an inked ribbon against the paper using a hammer or pins. Following are the example of Impact printer-
Dot-Matrix Printer, Daisy-Wheel printer, Drum Printer, Chain Printer, Line Printer etc.
I- Dot-Matrix printer:- The Dot- Matrix printer uses print heads containing from 9,18, or 24 pins that strike an inked ribbon. That offers the best quality. These Pins produce patterns of dots on the paper to form the individual character. Dot Matrix printer print about 50-500 Character per second (cps). The 24 pin dot matrix printer produce more dots then the 9 or 18 pin dot matrix printer. Which result the better quality. there is also a color ribbons but there is limited use of color. The main drawback is is noisy, inexpensive.
II-Daisy-Wheel printer:- It produces quality type paper. It is a serial printer. Its a daisy while printer, because its look like a daisy. the daisy wheel is a disk made of plastic on which characters stand out in relief along the outer edge. A hammer strikes a Petal containing a character against the ribbon. It cannot print graphics. It can print 20 to 50 characters per second(cps). But there is also the drawback that is also noisy and slow.
III-Drum printer:- It consist of a solid , cylindrical drum which is a complete set of character for each print position on a line is a continuously rotating drum behind and inked ribbon. Mean the number of print positions across the drum equals the number available on the page. The Drum rotate at rapid speed. The speed of drum printer from 300 to above 2000 lines per minutes (lpm).
IV-Chain Printer:- It is a character printer. It is also called as band printer. It is a chain of print character. there is one hammer for each print position. The print element in a chain printer is a metallic band that rotates horizontally in front of paper. the hammer strikes the page, pressing the paper against a ribbon and the character located at desired print location. There are mainly five section, each section consist of 48 character. It can produce 400 to above 2500 character per second.
V-Line Printer:- It is a high speed printer that can print a line at one time. In companies or for business where large amount of work done through printer, there character at a time printers are very slow., so therefore there these type of printers are used , that can print a line at a time. it can typically print 1000 to 5000 lines per minutes. The major drawback is that it can not print graphics, print quality very low also very noisy .
Non- Impact Printer:- The another is Non impact printers. non impact printers do not use a striking device to produce character on the paper. Now a days we use non impact printers. These are faster then the impact printers. There is no physical contact between the printing mechanism and the paper (mean no use of hammer for print a character). following are the examples of No impact printers are-
Ink jet printer, laser Printer etc.
I- laser Printers:- It also creates images with dots. however, as in a photocopying machine, these images are created on a drum. Mean it works like a photocopy machine. laser printer produce images on paper by directing a laser beam at a mirror which bounces the beam onto a drum.
laser printers use buffers that store an entire page at a time. There having built in RAM chips that use to store documents output from the computer. Some of the Laser Printers can print eight pages per minute. It is faster then other , it can print approximately 21, 000 lines per minutes or 450 pages per minutes.
II-Ink-Jet printers:- It works in same fashion of Dot matrix printers in the forms images or character with little dots. It can print in color and quieter then the laser printer. And also mush less expensive then the laser printer. However they are slower and print in a some what lower resolution like 400- 700 dot per inch. then laser printer. However, the dots are formed by tiny droplet of ink. Ink jet printers form chracters on paper by spraying ink from tiny nozzles through an electrical field that arranges the charged ink particles into characters at the rate of approximately 300 characters per seconds.
There are two type of printers Impact and Non- Impact printer.
Impact printer- An Impact printer has mechanism to make contact with the paper. It forms characters or images by striking a mechanism such as pressing an inked ribbon against the paper using a hammer or pins. Following are the example of Impact printer-
Dot-Matrix Printer, Daisy-Wheel printer, Drum Printer, Chain Printer, Line Printer etc.
I- Dot-Matrix printer:- The Dot- Matrix printer uses print heads containing from 9,18, or 24 pins that strike an inked ribbon. That offers the best quality. These Pins produce patterns of dots on the paper to form the individual character. Dot Matrix printer print about 50-500 Character per second (cps). The 24 pin dot matrix printer produce more dots then the 9 or 18 pin dot matrix printer. Which result the better quality. there is also a color ribbons but there is limited use of color. The main drawback is is noisy, inexpensive.
II-Daisy-Wheel printer:- It produces quality type paper. It is a serial printer. Its a daisy while printer, because its look like a daisy. the daisy wheel is a disk made of plastic on which characters stand out in relief along the outer edge. A hammer strikes a Petal containing a character against the ribbon. It cannot print graphics. It can print 20 to 50 characters per second(cps). But there is also the drawback that is also noisy and slow.
III-Drum printer:- It consist of a solid , cylindrical drum which is a complete set of character for each print position on a line is a continuously rotating drum behind and inked ribbon. Mean the number of print positions across the drum equals the number available on the page. The Drum rotate at rapid speed. The speed of drum printer from 300 to above 2000 lines per minutes (lpm).
IV-Chain Printer:- It is a character printer. It is also called as band printer. It is a chain of print character. there is one hammer for each print position. The print element in a chain printer is a metallic band that rotates horizontally in front of paper. the hammer strikes the page, pressing the paper against a ribbon and the character located at desired print location. There are mainly five section, each section consist of 48 character. It can produce 400 to above 2500 character per second.
V-Line Printer:- It is a high speed printer that can print a line at one time. In companies or for business where large amount of work done through printer, there character at a time printers are very slow., so therefore there these type of printers are used , that can print a line at a time. it can typically print 1000 to 5000 lines per minutes. The major drawback is that it can not print graphics, print quality very low also very noisy .
Non- Impact Printer:- The another is Non impact printers. non impact printers do not use a striking device to produce character on the paper. Now a days we use non impact printers. These are faster then the impact printers. There is no physical contact between the printing mechanism and the paper (mean no use of hammer for print a character). following are the examples of No impact printers are-
Ink jet printer, laser Printer etc.
I- laser Printers:- It also creates images with dots. however, as in a photocopying machine, these images are created on a drum. Mean it works like a photocopy machine. laser printer produce images on paper by directing a laser beam at a mirror which bounces the beam onto a drum.
laser printers use buffers that store an entire page at a time. There having built in RAM chips that use to store documents output from the computer. Some of the Laser Printers can print eight pages per minute. It is faster then other , it can print approximately 21, 000 lines per minutes or 450 pages per minutes.
II-Ink-Jet printers:- It works in same fashion of Dot matrix printers in the forms images or character with little dots. It can print in color and quieter then the laser printer. And also mush less expensive then the laser printer. However they are slower and print in a some what lower resolution like 400- 700 dot per inch. then laser printer. However, the dots are formed by tiny droplet of ink. Ink jet printers form chracters on paper by spraying ink from tiny nozzles through an electrical field that arranges the charged ink particles into characters at the rate of approximately 300 characters per seconds.
the information provided is straight forward i.e.directly to the point which is very help full and save times
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