Thermal transfer printing machine

1. A thermal transfer printing machine for transferring image information on an information carrying medium to a printing medium thermally, comprising:

a first platen roller adapted so as to be rotatable;

a second platen roller adapted so as to be rotatable, the second platen roller being separated from the first platen roller and also paralleled thereto substantially; and

a thermal print head disposed between the first platen roller and the second platen roller, for effecting a thermal transfer of the image information from the information carrying medium to the printing medium, wherein

the thermal print head is adapted so as to be movable between a first transfer position to allow the thermal print head to oppose the first platen roller and a second transfer position to allow the thermal print head to oppose the second platen roller.

2. The thermal transfer printing machine of claim 1 , further comprising a thermal-head rotating unit for rotating the thermal print head about a first shaft as a rotating center between the first transfer position and the second transfer position, wherein

the first shaft is substantially parallel to respective rotating shafts of the first platen roller and the second platen roller.

3. The thermal transfer printing machine of claim 2 , further comprising a thermal-head carrier in which the thermal print head is movably arranged and which constitutes a base of the thermal-head rotating unit, wherein

the thermal-head carrier is provided with a thermal-head moving unit that enables the thermal print head to approach and depart from the first platen roller and the second platen roller.

4. The thermal transfer printing machine of claim 3 , wherein

the thermal-head rotating unit includes a first motor arranged outside the thermal-head carrier to rotate the thermal print head, and

the first shaft is secured to the thermal-head carrier and rotated by the first motor.

5. The thermal transfer printing machine of claim 3 , wherein

the thermal-head moving unit includes a second motor arranged inside the thermal-head carrier to move the thermal print head with respect to the first platen roller and the second platen roller.

6. The thermal transfer printing machine of claim 1 , further comprising a controller for controlling the operation of the thermal print head at the first transfer position and the second transfer position, wherein

the controller is adapted so as to output first image signals to the thermal print head positioned at the first transfer position.

7. The thermal transfer printing machine of claim 6 , wherein

the controller is also adapted so as to output second image signals to the thermal print head positioned at the second transfer position, allowing two kinds of printings.

8. The thermal transfer printing machine of claim 6 , wherein

the controller is also adapted so as to output heating signals to the thermal print head positioned at the second transfer position, allowing a re-transfer printing where the image information printed on the information carrying medium at the first transfer position is transferred to the printing medium at the second transfer position.

9. The thermal transfer printing machine of claim 1 , wherein

the information carrying medium is formed by either an ink ribbon or a re-transfer film having the image information printed thereon, while the printing medium is formed by either a printing paper or a re-transfer film having no image information printed thereon.