The present invention relates to an impact printer.
The impact printer is characterized by the fact that the printer can produce plural hard copies of output data at a time by using carbon paper or no-carbon paper. Recently, a dot matrix type impact printer has been becoming increasingly popular for use in electronic devices for the business purpose, such as wordprocessors, because it can easily accommodate a variety of fonts. The impact strength of the printer is adjusted beforehand for printing plural sheets (superimposed) of paper so that the printer can clearly print characters on every one of the sheets of paper. This impact strength is not changeable depending on types of paper, number of sheets to be printed, or others. This results in the problem that the printer makes loud noises and wastes electrical energy when the printer prints characters on a single sheet (not superimposed) of paper, for example, when the printer is equipped with an auto sheet feeder which feeds one sheet to the printer at a time.