Soft pinch roller to reduce hand-off error

Details Soft pinch roller to reduce hand-off error Soft pinch roller to reduce hand-off error

1998-03-03

2000-03-28

Ellis, Christopher P.

Sheet feeding or delivering

Feeding

Multiple supplies

271242, B65H 344, B65H 526, B65H 904

Patent

active

060421002

ABSTRACT:
A pinch roller acts in combination with a drive roller to provide a nip through which sheets are passed in a sheet handling system. To reduce hand-off errors in the line feed accuracy of the sheet handling system, the pinch roller includes a compliant outer surface and soft undersurface volume. The flexibility of the outer surface allows the pinch roller to shift its holding force from the media to the pinch roller as the media leaves the nip between the rollers. This reduces the force seen by the media in the direction of the media travel, thus reducing the localized push on the back edge of the media. The soft undersurface volume is formed by a foam core.

REFERENCES:
patent: 4269594 (1981-05-01), Umans et al.
patent: 4425694 (1984-01-01), Sommerville
patent: 5163675 (1992-11-01), Sunohara
patent: 5387172 (1995-02-01), Habenicht et al.
Hewlett-Packard Drawing No. B-5061-7823-1, "Pinchroller," Nov. 26, 1990 (Cranford, Kevin).

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