| 摘要 |
<p>Device to draw a strip (6) of flexible material, which is advantageously but not only of a photographic film, in which device there may be included a slide surface (7) on which the strip (6) moves forward, and there may also be included reference and guide means (9) against which the strip (6) abuts with at least one of its edges (11), the device providing at least one motive roll (1) and a counter-roll (2) which are able to cooperate with at least that one edge (11) to perform the drawing action, the circumferential periphery of the motive roll (1) comprising profile means (12-13) able to exert on the edge (11) of the strip (6) at least a first action (16) directed substantially in a direction perpendicular to a second action (17) which is directed in the direction of forward movement of the strip (6), the first action (16) being suitable to exert a lateral thrust on the edge (11) against the reference and guide means (9) and being substantially less strong than the second action (17) so as to ensure a constant straight forward movement of the strip (6).</p> |
