| 摘要 |
A center wind assist mechanism for use in a web winding device for winding a substantially continuous web onto a reel bar. The winding device incudes a driving drum that maintains a first nip engagement with the reel bar to rotate the reel bar and transfer the web passing over a surface of the driving drum onto the reel bar. The web winding device further includes a transfer mechanism for moving the reel bar from a primary winding position to a secondary winding position while maintaining the reel bar in nip driving engagement with the driving drum. The web winding device is characterized by a center wind assist mechanism for applying a driving torque to the reel bar as the reel bar moves from the primary winding position to the secondary winding position. The center assist winding mechanism includes a drive assist support arm pivotally mounted to the transfer mechanism to move therewith and pivot relative thereto. A driving wheel is rotatably connected the drive assist support arm. A drive mechanism and transmission mechanism cooperate to rotatably drive the driving wheel. A tensioning mechanism is connected to the transfer mechanism to maintain the driving wheel in driving and torque transfer relation with a peripheral surface portion of the reel bar. The center assist drive mechanism insures a more distributed nip pressure being applied across the web passing between the reel bar and winding drum during this initial phase of winding.
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