부산대학교 도서관

This invention provides a system and method for rotating sheets, receiving cut sheets and providing them to a utilization device. The rotator continually engages sheets with a drive or rotation component throughout the transport and rotation process. The rotator includes a transport mechanism having nip roller pairs. The nip rollers can be engaged with, and disengaged from, the driven rollers. This allows for feed velocity differentials when entering and exiting the rotator feed table, and for clearance during sheet rotation. A rotator disk assembly is centered on the table, and comprises a driven rotator disk and an overriding, pressure disk. When sheets enter or pass through the rotator section, the pressure disk is raised to provide a clearance. Sheets are rotated by lowering the pressure disk and raising surrounding nips to provide clearance for the disk to turn. Nips can then be lowered to drive the rotated sheet downstream.