Envelopes – wrappers – and paperboard boxes – Paperboard box – Compartmented
Patent
1993-01-27
1994-10-18
Elkins, Gary E.
Envelopes, wrappers, and paperboard boxes
Paperboard box
Compartmented
229 25R, 220416, 220462, B65D 548
Patent
active
053560701
ABSTRACT:
A composite food packaging article having internal partitioning walls and corresponding method of manufacture is constructed from flat, machine formed paperboard. A pair of die cut and folded paperboard blanks are inserted within the opposing cavities of a blow mold. A hot-flow parison between the cavities expands to structurally unitize the folded paper blank into a fluid impermeable tray vessel.
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Elkins Gary E.
Marcontell W. A.
McDaniel J. R.
Schmalz R. L.
Westvaco Corporation
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