| 摘要 |
Web-guiding apparatus having a plurality of pairs of web stretching slats supported across the peripheries of disks for rotation about a shaft, wherein the slats are independently movable longitudinally of the shaft. A cam follower is mounted under each slat at each end of each pair of slats and projects inwardly. Feelers sense deviations of the edges of the web from predetermined locations defining a passage for the web. A pair of circumferential cams are mounted one on each portion of the shaft, each cam having an inclined circumferential channel for receiving a cam follower and for defining a range of positions for the cam follower longitudinal of the axis of the shaft. The cams are independently rotatable in response to the feelers such that the slats are movable through the range of positions to restore the edges of the web to the predetermined locations.
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