TIGHTLY NESTABLE PLASTIC CUPS AND CONTAINERS WITH IMPROVED RIGIDITY-TO-WEIGHT CHARACTERISTICS
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United States of America Patent
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Issued Date -
Nov 10, 2011
app pub date -
May 6, 2011
filing date -
May 6, 2010
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Abstract
A cup or container offers improved rigidity-to-weight ratio and tight nesting. The cup or container has four flat or moderately concave sidewalls arranged to form a substantially square cross section. An upper rim is moderately convex or round and/or otherwise shaped and/or reinforced to resist distortion. The stiff upper rim causes the cup or container to resist deformation by compression of sidewalls during handling and use, because the walls cannot be deformed without deforming the rim, thereby providing a more functional and usable cup or container at a reduced weight compared to prior art cups having different shapes and/or convex sidewalls. The cup or container can be thermoformed or injection molded. Sidewalls can be less than 0.33, 0.3, 0.28 or 0.25 mm thick with volumes of less than 6, 5, 4, or 3 oz respectively. A lid can be included for attachment to the upper rim.
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