Sheet feeder for a sheet handling machine
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United States of America Patent
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Jul 19, 2005
Grant Date -
Apr 1, 2004
app pub date -
Sep 23, 2003
filing date -
Sep 27, 2002
priority date (Note) -
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status (Latency Note)
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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.
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