Prefeeder for stacked sheets of paperboard products

Details Prefeeder for stacked sheets of paperboard products Prefeeder for stacked sheets of paperboard products

1993-04-22

1995-06-13

Huppert, Michael S.

Material or article handling

Apparatus for moving intersupporting articles into, within,...

Unstacking apparatus

1988613, 271280, 414796, 4147964, B65H 324, B65H 536

Patent

active

054236576

ABSTRACT:
An improved prefeeder assembly for shingling planar sheets 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 bock 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 bottommost block segment as this block segment is being shingled. As shingled sheets are discharged to other process equipment, a tamping assembly tamps the sheet edges for uniform restacking.

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patent: 4700941 (1987-10-01), Shill
patent: 4715488 (1987-12-01), Hewitt et al.
patent: 5028201 (1991-07-01), Hawthorne

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