- Printer is a hardware for a computer.
- Takes input from computer and generates output on paper in the form of text and graphics.
Types of Printer
I. Impact printers
- Impact printers make contact with the paper.
- Forms a print image or text by pressing an inked ribbon against the paper using hammer or pins.
Dot Matrix Printer
Printheads produce a pattern of dots on the paper.
Daisy Wheel Printer
Hammer strikes the petal containing charecter against ribbon to print on the paper.
Chain Printer
Prints total line at a time.
II. Non-Impact printers
- Does not make contact with paper.
- Produses image or text om paper by droplets of ink or laser beam.
Inkjet Printer
Prints images and charecters by spraying ink from tiny nozzles.
Laser Printer
Produce images and text by directing a laser beam on to a drum.
Differences between inkjet and Laser printers
| Inkjet Printer | Laser Printer | |
| How it works | Ink droplets sprayed on to the paper to form charecters or images. | Produce text or images on paper by directing laser beam at a mirror which bounces the beam on to the drum. |
| Speed | Good | High speed |
| Quality | Excellent photo quality | Excellent print quality |
| Noisy | Less | More and sometimes disruptive |
| Cost | Less expensive | More expensive |
- Thermal Printer is also a Non-Impact printer.
- Printout is ever neat and legible.
- Easy to operate.
- Doesn't contain any movable parts, so don't make any noise while printing.
- Commonly used in fax machines and ATM machines.
- They are very useful in doing business.
Thermal head presses the ribbon with pins to burn onto the heat sensitive papar for printing.
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