| 摘要 |
In an apparatus such as a printing press or collator for performing operations such as printing, perforating, punching, die cutting, crimping and the like on a continuous paper web, a registration unit for particular use in a crimping and tractor station and for changing the phase index of a shaft relative to the web where said shaft is rotatably mounted between parallel frame members of said crimping and tractor station or unit, the registration unit having a sleeve rotatably mounted about the shaft with a sleeve gear drive mounted thereto and rotatable therewith. A second gear drive member is mounted to the sleeve and concentric with the sleeve gear drive for rotation therewith, said sleeve gear drive providing a drive means for rotatably driving said shaft. A motor drive and gear assembly is mounted to said shaft outboard of said frame and inboard of said sleeve for rotation with said shaft and is in engagement with said second gear drive member for selectively rotating said shaft relative to said sleeve, whereby relative rotation of said second gear drive member and shaft produces rotation of said shaft relative to said sleeve and sleeve gear drive. In one aspect of the invention each tractor and crimper shaft is drivingly interconnected, with a registration unit provided for each shaft, thus providing selective phase indexing of each shaft relative to the web.
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