Roll release mechanism

Details Roll release mechanism Roll release mechanism

1984-05-21

1989-10-10

Butler, Douglas C.

Sheet feeding or delivering

Feeding

By means to convey sheet

271314, B65H 502, B65H 504

Patent

active

048726613

ABSTRACT:
Roll release mechanism for pinch rolls are improved by providing capability for axial and radial disengagement of the pinch rolls and automatic roll re-engagement upon machine activation. One set of pinch rolls is mounted on a first shaft with a helical cam thereon. A spring latch and pawl are engaged to the first shaft and attached to a second multi-radius shaft parallel to the first shaft. A second set of pinch rolls are mounted on the second shaft so as to engage the first set of pinch rolls. Axial movement of the second shaft results in shaft areas of different radius being fitted within bearings thereby disengaging the pinch rolls. Disengagement is maintained against a spring force by the catching of the pawl on the cam. Machine activation then results in rotation of the first shaft until the pawl is released from the cam and the spring force moves the second shaft axially until the pinch rolls have re-engaged. In addition, the pinch rolls may be re-engaged manually.

REFERENCES:
patent: 3252311 (1966-05-01), Boyer
patent: 3443408 (1969-05-01), Gutknecht
patent: 3661383 (1972-05-01), Morrison
patent: 3856461 (1974-12-01), Jordan
patent: 4046372 (1977-09-01), Ebner

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