| 摘要 |
Applicable to machines having a moving carriage ( 4 ) that can move transversally with respect to the continuous band to be printed and that includes a thermal printing head ( 9 ) by which passes a thermal ribbon, from a cassette of origin ( 5 ) to a destination cassette ( 10 ), which pulls said ribbon ( 7 ), its characteristics centred on the fact that the drive motor for said ribbon ( 7 ) instead of being established on the moving carriage ( 4 ) is established on the fixed plate ( 3 ) along which the aforementioned carriage may travel, for which purpose said motor acts directly or indirectly on a roller ( 12 ) mounted on the fixed plate ( 3 ), aided by a return roller ( 14 ) to establish a transmission belt ( 14 ) which bends in its path due to a pair of auxiliary rollers ( 16-16' ) mounted free to revolve about the carriage ( 4 ), by which bend the belt ( 13 ) is connected to a drive roller ( 15 ) that is also mounted on the carriage ( 4 ), which transmits the motion to the pulling cassette ( 10 ) by a transmission belt ( 20 ) and by a clutch mechanism such that the rotation of said drive roller ( 15 ) is only transmitted to the cassette ( 10 ) when the aforementioned motor is working.
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