Abstract: A paper feeding mechanism having a platen is driven by power from a drive source and clamps a recording paper sheet with paper holding rollers and pinch rollers so as to feed the recording paper sheet along the paper guide. When the recording paper sheet is loaded, a lever serves to separate the paper holding rollers from the platen. When a microswitch detects the operation of the lever, the platen is automatically rotated by a predetermined amount.

Abstract: A printing apparatus comprises a type wheel carrying a plurality of type elements and a platen for mounting and advancing a printing paper. A hammer can strike any one of the type elements against the printing paper and an ink ribbon is positionable between the type elements and the paper to imprint a character on the paper when any one of the type elements is struck. The ink ribbon is advanced by a driving mechanism. First, second, and third selecting systems respectively select one of a plurality of degrees of advancement of the printing paper, one of a plurality of time intervals of actuation of the hammer, and one of a plurality of amounts of advancement of the ink ribbon. First, second, and third counters each count pulses from respectively associated first, second, and third pulse generators to, respectively, first, second, and third set values determined by the selected degree of paper advancement, time interval of hammer actuation, and amount of ribbon advancement.