Translating nip registration device

Details Translating nip registration device Translating nip registration device

1992-06-01

1993-06-15

Bollinger, David H.

Sheet feeding or delivering

Feeding

With means to align sheet

271236, 271242, 271252, B65H 702

Patent

active

052191591

ABSTRACT:
An apparatus to bilaterally register and deskew sheets in an electrophotographic printing machine by driving the sheet against a pair of stalled drive rolls and then activating the drive rolls when the sheet is deskewed. The drive rolls are then laterally translated while the sheet is within the nips of the drive rolls. The proper side registration position of the sheet is sensed and stored and the sheet is brought to that proper registration position. Once the sheet has passed through the drive rolls, the rolls return to the center of the paper path to receive subsequent sheets. A stepper motor is used to translate the roll pairs in a lateral direction and the pulse counts are utilized to store the side registration and sheet acquisition positions thereby eliminating the need for a home position sensor or switch.

REFERENCES:
patent: 4453659 (1984-06-01), Torpey
patent: 4480825 (1984-11-01), Landa
patent: 4500045 (1985-02-01), Whitaker et al.
patent: 4685664 (1987-08-01), Petersdorf
patent: 4805892 (1989-02-01), Calhoun
patent: 5094442 (1992-03-01), Kamprath et al.

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