| 摘要 |
PURPOSE:To reduce the number of bars provided on a ribbon, by a method wherein the output pulse number of a frequency generator required for the ribbon transfer from one coloring part to another coloring part is operated for feeding a ribbon. CONSTITUTION:When a ribbon 3 moves and a sensor 16 detects a head setting bar 14, the ribbon 3 stops moving and a thermal head 8 comes into pressure contact with the ribbon 3. With the start of printing, a take-up spool 2 rotates to be wound round with the ribbon 3. Due to this rotation a frequency generator 17 outputs pulses, and a counter 20 counts the pulses. After the completion of a printing with Y for one picture plane, a pulse number N1 in a printing interval for the one picture plane remains in the counter 20, and a ribbon motor 4 stops. A first arithmetic means 21 calculates the travel distance of the ribbon 3 per pulse from the pulse number N1, and a second arithmetic means 22 calculates a pulse number N2 of the generator 17 required for a next head setting for a coloring part 13 from the obtained travel distance. After that, when the ribbon 3 moves and the pulse number comes to N2, the head setting position of an M coloring part moves to the position opposed to a thermal head 8.
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