Envelopes – wrappers – and paperboard boxes – Paperboard box – Elevated bottom wall included in a one-piece box construction
Patent
1988-04-20
1989-10-03
Elkins, Gary
Envelopes, wrappers, and paperboard boxes
Paperboard box
Elevated bottom wall included in a one-piece box construction
229 35MF, 229112, 229171, 229182, 229903, B65D 526
Patent
active
048711110
ABSTRACT:
A package for holding food for cooking in a microwave oven has a flat central panel for supporting the food, which has at least three linear panel edges. A flat side wall is attached at a fold line to at least two of the panel edges of the central panel. Each side wall has an inner panel and an outer panel affixed against the inner panel. The outer panel has a maximum width as measured perpendicular to the fold line connecting the side wall to the central panel that is greater than the width of the inner panel, also measured perpendicular to the fold line. The invention also encompasses a flat blank that can be folded and locked or glued into the preceding package configuration. For microwave oven use, the blank is made from paperboard material having a layer of microwave interactive material that heats to browning temperatures when exposed to microwaves.
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"Microwave Heating", by David A. Copson, p. 289, 1962.
Elkins Gary
Waldorf Corporation
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