CPC A47B 96/20 (2013.01) [A47B 96/18 (2013.01); B29C 49/20 (2013.01)] | 20 Claims |
1. A blow-molded unitary structure comprising:
a panel comprising a first panel wall and a second panel wall spaced apart from the first panel wall;
a plurality of first depressions monolithically formed with the panel, each recessing from the second panel wall toward an interior of the panel;
a plurality of first protrusions monolithically formed with the panel, each protruding from the second panel wall toward an exterior of the panel and elongated in a first direction; and
a plurality of second protrusions monolithically formed with the panel, each protruding from the second panel wall toward an exterior of the panel and elongated in a second direction;
wherein:
at least a subset of the plurality of first depressions is arranged into a plurality of depression rows in the first direction and a plurality of depression columns in the second direction across at least a portion of the panel;
first protrusions in at least a subset of the plurality of first protrusions are arranged alternatively with depression rows in at least a subset of the plurality of depression rows;
second protrusions in at least a subset of the plurality of second protrusions are arranged alternatively with depression columns in at least a subset of the plurality of depression columns;
the first protrusions in the subset of the plurality of first protrusions and the second protrusions in the subset of the plurality of second protrusions cross each other, thereby creating a panel wall opposite to the first panel wall with respect to the second panel wall to enhance a strength of the blow-molded unitary structure.
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