| 摘要 |
The spindle receiving chuck of a web handling apparatus comprises a holder of arcuate configuration and having a segmental gap therein which is wide enough to permit the passage of a spindle into and from the chuck. The interior of the holder body is spherical and a chuck assembly having a spherical outer surface is rotatably and swively mounted within the holder. The chuck assembly includes a U-shaped yoke and an arcuate segment pivotally connected at one of their respective ends and jointly defining a ring when their other respective ends are in abutment. A crank arm is secured to the ring for rotating it within the holder to move the segment into and from alignment with the segmental gap to permit loading and unloading a spindle, and locking the spindle within the ring. The web handling apparatus has pairs of arms with a spindle chuck carried by each arm to jointly support a spindle between said arms, said holders being positioned with their gaps on the upper sides of the arms in spindle loading position and means being provided to operate both chucks in each pair of arms simultaneously.
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