Sheet Paper Turnaround Aligner for a High Speed Paper or Document Feeder
Original Publication Date: 1986-Dec-01
Included in the Prior Art Database: 2005-Mar-09
A device is described to provide alignment of paper sheets at high speeds, at a sheet turnaround station, while maintaining sheet alignment. The device is illustrated in Fig. 1 and Fig. 2 in a configuration utilizing a document feeder. Documents placed in hopper 1 by an operator can be in a skewed state. The top sheet is picked off the stack by a belt vacuum plenum 2 and is fed into the subject aligner/turnaround mechanism 10. The document is fed between the drive roll 11 and a skewed backup roll (bur) 4, rotating in a clockwise direction. Relative to paper, the drive roll 11 is of a low friction material and bur 4 is of a high friction material. The resulting forces cause the sheet to rotate in its plane in a counterclockwise direction until the document contacts reference edge 3A of flanged roll 3.