Cupstock with rim-formation index and associated methods and rimmed cup products
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United States of America Patent
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May 7, 2024
Grant Date -
Nov 11, 2021
app pub date -
Oct 18, 2019
filing date -
Oct 19, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
A cupstock for making rimmed cups, such as coffee cups, can be manufactured from recycled paper fibers while having a rim-formation index (RFI) and/or structural and flexural factors, based on certain properties of the cupstock to facilitate a quality rim. For example, the RFI can be based on the thickness, ring crush MD, bending stiffness MD, and areal density of the cupstock. The cupstock can be made from 100% recycled fibers from old corrugated cardboard (OCC) and provided with structural and flexural factors within respective ranges to ensure adequate rim formation when converted into a rimmed cup.
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