| 摘要 |
<p>This invention relates to a device (11) for the feeding of a printing ribbon (12), comprising a pair of gears (13, 14) reciprocally engaged and made to rotate by a driving shaft (17), and a third gear (20) engaged with a gear (13) of the pair. In order to increase the feeding force of the printing ribbon (12), the printing ribbon (12) is interposed both between the gears (13, 14) of the pair, and between the third gear (20) and one of the gears (13) of the pair, in such a way as to follow the profile of the engaged teeth of the gears (13, 14 and 20) and so to arrange according to a form with windings. The diameter of the third gear (20) is greater than the diameter of the other gear (14) of the pair, so that in an intermediate portion (27) between the third gear (20) and the other gear (14) the ribbon (12) is constantly tight.</p> |
