| 摘要 |
<p>The drive device is of the type comprising tongues (11) cut out with a hollow punch in pairs from the strip (1) and folded out of the plane of the strip, these tongues (11) being designed to come to bear on the flanks (19) of the teeth (15) of the driving wheel (3). According to the invention, it is characterised in that the surfaces of the tongues (11) form an acute angle with the surface of the strip (1) and the front edges (21) of the tongues (11) bear on the flanks (19) of the teeth (15). <IMAGE></p> |
