Apparatus for prefeeding sheets of paperboard products
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United States of America Patent
Stats
-
Apr 27, 1993
Grant Date -
N/A
app pub date -
Aug 20, 1990
filing date -
Aug 20, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved prefeeder assembly for shingling sheets of planar material in which a sheet stack is positioned on a prefeeder lift conveyor which lowers the sheet stack into a floor pit to incrementally elevate the sheet stack. A block pusher assembly sequentially pushes block segments to a conveyor assembly where a shingling assembly shingles the sheets. A bottom sheet removal assembly having an in-path diverter plate contacts and diverts only the bottom sheet of the bottom most block segment as this block segment is being shingled. As shingled sheets are discharged to other process equipment, a tamping assembly actuated by balloon cylinders serve to tamp the sheet edges for uniform restacking.
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