Basically, most dot matrix printers and typewriters
Dot matrix printers utilize ribbons which are ink-soaked with cloth ribbons. The cloth ribbons are then pressed against the paper and the print mechanism clicks on the letters and shapes. Unlike the common typewriter, the letters in a dot matrix printer are drawn by dot matrix. The dot matrix system is responsible for creating large fonts and various graphics. Once the right fonts are made the images are pasted to the paper through mechanical pressure. If the user will need several other copies, the printer can make carbonless copies.
The dots which will be pressed upon the printer ribbons are actually made by a tiny metal rod called a Pin. The pin and the ribbon are dragged together with a tiny electromagnet. The ribbons can move because of a small guided plate which is embedded on the machine. In order for the pins to move there are several holes which serves as the guides for each letter and each graphics printed. The moving portion of the printer where the ribbons are located is called the print heads.
Normally, the print heads can only print one line of text or graphic at a time. Similar to the typewriter, the printer will need to move left to right and then move to the next line in order to print. Some matrix printers today can actually print through a single vertical line and are the improved according to dot density.
Today, the dot matrix printer and printer ribbons are still used in most companies. Since they can print in a multi-part stationary they can virtually create a lot of copies at the same time. The ribbons that are used by impact printers are not only inexpensive but they are also easy to read. Users will not need any gauge to know if the ribbon is already dried out.
Usually, the printouts will look faded rather than stopping the printed task. Dot matrix printers can also use continuous paper rather than individual sheets. They are ideal for tasks which require a lot of printing jobs such as survey collection, data analysis jobs as well as accounting jobs. The ink ribbon does not dry out easily hence they are ideal in temperature controlled environments such as Fire Alarm Control Systems. People who are also working with graphs will also be able to appreciate dot matrix printers, for instance, scientists who analyze earthquakes and tectonic plates. Again, since the ribbons are inexpensive and the paper is bought in rolls, printing will virtually be continuous. Since such printers are efficient in heavy copying, they can virtually be used in any kind of job.