Sheet feeder for a sheet handling machine

Details Sheet feeder for a sheet handling machine Sheet feeder for a sheet handling machine

2005-07-19

2005-07-19

Walsh, Donald P. (Department: 3653)

Sheet feeding or delivering

Feeding

Separators

C271S108000

Reexamination Certificate

active

06918582

ABSTRACT:
A sheet feeder comprising a platform for stacking sheets and feed head assembly at the front of the platform for acquiring individual sheets from the stack and feeding separate sheets into a sheet handling machine. The feed head assembly is comprised of a vacuum plenum having a port plate, across which a perforated belt(s) moves in a closed loop. The port plate includes ports wherein the air flow through some of the ports is restricted by an intermediate plate positioned within the plenum which, in turn, has a restrictive passage therein through which air from the restricted ports must flow into the plenum.

REFERENCES:
patent: 5072922 (1991-12-01), Paulson
patent: 5213320 (1993-05-01), Hirota et al.
patent: 5707056 (1998-01-01), Rauen et al.

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