| 摘要 |
A thermal head (2) of a printer is provided to contact a platen (1) through an elongated print paper (7) and an elongated ink ribbon (9). One end of the ink ribbon (9) is wound and retained on a ribbon core (10), and the other end is taken up by a take-up spool (11). The print paper (7) and the ink ribbon (9) can be fed back at the same speed by reversely rotating the platen (1). At the same time, rotation resistance to be applied from the take-up spool (11) to the ink ribbon (9) is removed by a resistance removing device. Further, the ribbon core (10) is reversely rotated by a ribbon core reverse driving device to rewind the ink ribbon (9), thereby preventing slacking of the ink ribbon (9). |
