Two step optimized stalled roll registration and deskew

Details Two step optimized stalled roll registration and deskew Two step optimized stalled roll registration and deskew

1996-04-01

1998-07-07

Bollinger, David H.

Sheet feeding or delivering

Feeding

With means to align sheet

27126501, B65H 904

Patent

active

057756902

ABSTRACT:
A sheet aligning and registration device for a printing machine. In a stalled roll registration device there is provided a drive mechanism preceding the stalled roll and a sensor to determine the size of a buckle formed in a sheet as it is fed into the registration nip formed by the stalled roll pair. When the buckle reaches a predetermined size the sensor generates a signal which causes the drive controller to briefly pulse the registration roll pair. This brief pulse of the registration roll pair captures the sheet in the nip in a deskewed and registered position for subsequent feeding in a timed relationship to a machine subsystem. A baffle located between the drive nip and registration nip directs the sheet buckle formation in a controlled manner so that proper deskewing and registration forces are obtained.

REFERENCES:
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Xerox Disclosure Journal, vol. 10, No. 1 Jan./Feb., 1985, p. 17 Author: Schoppe, et al.

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