| 摘要 |
<p>A process and a device are provided to control the motion of a web of material continuously supplied to a machine operating sequentially. The process includes continuously leading the web around a section of the circumference of a rotating roller arranged on an axle and between two rotary plates. The plates are also mounted on axles of rotation and are fitted between two side frames. The roller is offset in relation to the axles of the two plates and the angular position of the roller axle is varied during rotation of the plates in such a way as to ensure a full standstill of the web within the machine during a predetermined period. The total amount of the web, which is arriving continuously, is absorbed. The roller axle is shiftable into a desired offset position by means of a control screw. A shiftable counter-weight on the control screw compensates for the weight of the roller. Two pivoting supports connected to the roller permit the angular position of the latter to be varied. These supports are arranged to correct, the rate of variation of the angular position, depending on the eccentricity of the roller with regard to the plate axles.</p> |
