Sheet feed mechanism having plural independent feed rollers and

Details Sheet feed mechanism having plural independent feed rollers and Sheet feed mechanism having plural independent feed rollers and

1996-02-02

1997-09-09

Milef, Boris

Sheet feeding or delivering

Feeding

Separator and conveyor

271 1013, 271116, 271117, 271122, 27126502, B65H 500, B65H 306

Patent

active

056647719

ABSTRACT:
A sheet feed mechanism includes first, second, and third feed rollers, first and second servo motors, a reverse roller, a torque limiter, a pick-up roller, and a plurality of photoelectric sensors. The first, second, and third feed rollers are respectively mounted on a feed path of sheets including mail pieces, on an upstream side of the first feed roller in the feed direction, and on the upstream side of the second feed roller in the feed direction, and are respectively rotated by the one-way clutches in only a feed direction. The first and second servo motors respectively drive the first and second feed rollers, and the second feed roller independently. The reverse roller is pressed against by the first feed roller through the feed path, and is driven to rotate in a counter feed direction. The torque limiter constantly applies a predetermined driving torque to the reverse roller in the counter feed direction. The pick-up roller is arranged on a downstream side of the first feed roller in the feed direction, and is constantly rotated to feed the sheet to a downstream transport path. The plurality of photoelectric sensors are sequentially arranged on the feed path between the first feed roller and the pick-up roller.

REFERENCES:
patent: 4077620 (1978-03-01), Frank et al.
patent: 4171130 (1979-10-01), Jeschke et al.
patent: 4522385 (1985-06-01), Stefansson
patent: 4573673 (1986-03-01), Haug
patent: 5129642 (1992-07-01), Suyatsky et al.

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