Apparatus for prefeeding sheets of paperboard products

Details Apparatus for prefeeding sheets of paperboard products Apparatus for prefeeding sheets of paperboard products

1990-08-20

1993-04-27

Huppert, Michael S.

Material or article handling

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

Unstacking apparatus

1988613, 271238, 271280, 271303, 414796, 4147964, B65H 324, B65H 536

Patent

active

052057046

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.

REFERENCES:
patent: 2940617 (1960-06-01), Reed
patent: 3581912 (1971-06-01), Bennett
patent: 3805982 (1974-04-01), Tolf et al.
patent: 3815762 (1974-06-01), Hoke et al.
patent: 4265578 (1981-05-01), Frederick et al.
patent: 4457658 (1984-07-01), Meylan
patent: 4619571 (1986-10-01), Peiffer
patent: 4700941 (1987-10-01), Shill
patent: 4715488 (1987-12-01), Hewitt et al.

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