| 摘要 |
<p>A method of making elements with profiled cross-section from sheet metal for use in a driving belt by a rolling process, for providing a strip with a middle groove in longitudinal direction and by rolling the material continuously symmetrically with respect to that groove to two profiles punching out the elements on both sides of the middle groove, with their longitudinal direction in the direction of movement of the strip, according to lines which are located at accurately predetermined distances on both sides of the groove.</p> |
