| 摘要 |
An apparatus for transporting continuous elongate material webs is described comprising means for transporting a material web (1) at a constant speed along a transport path and at least two material web guide means (4,5;8,9) arranged along the transport path, at least one guide means (4,5) being arranged upstream and at least one guide means (8,9) being arranged downstream of an intermediate position along the transport path. The upstream and downstream guide means (4,5;8,9) are moved relative to each other so as to impart a sinusoidal variation in speed to the material web at the intermediate position. Each guide means is eccentrically rotatably mounted so as to move substantially continuously between a position in which a maximum partial length of the material web and a position in which a minimum partial length of the material web is temporarily supported by the guide means and the upstream guide means moves at the same speed and in the opposite sense to the downstream guide means such that the length of the material web is substantially constant between the upstream and downstream guide means. <IMAGE> |
