Patent ID: 9688456
Date: 2017-06-27
CPC Classifications: B65D

Claim:
1. A cup comprising a body made of an insulative cellular non-aromatic polymeric material and formed to include an interior region providing a fluid-holding reservoir and a rolled brim made of the insulative cellular non-aromatic polymeric material and formed to include an interior chamber, the rolled brim being coupled to the body to frame an opening into the interior region and to extend around the body to cause the interior chamber of the rolled brim to lie outside of the interior region of the cup, wherein the rolled brim includes a curved brim lip having a first end and an opposite second end arranged to lie in spaced-apart confronting relation to the first end and a curved brim seam arranged to interconnect the first end and the opposite second end of the curved brim lip, wherein the curved brim seam includes an inner rolled tab coupled to the first end of the curved brim lip and an outer rolled tab coupled to the second end of the curved brim lip and arranged to overlie and mate with an outwardly facing surface of the inner rolled tab, wherein the rolled brim has a rolled-brim efficiency in a range of about 1.0 to about 1.40 to provide a substantially endless and even outer surface of the rolled brim along the entire circumference of the rolled brim with little, if any, step formed in the rolled brim at a junction formed between the curved brim seam and the first end of the curved brim lip so that fluid leak paths that might otherwise be formed when a lid is coupled to the rolled brim to close the opening into the interior region are minimized, wherein the insulative cellular non-aromatic polymeric material is made from a formulation comprising a first polypropylene, and wherein the curved brim lip has a generally constant brim-lip thickness throughout, the inner rolled tab of the curved brim seam has a generally constant inner-tab thickness that is smaller than the brim-lip thickness of the brim lip, and the outer rolled tab of the curved brim seam has a generally constant outer tab thickness that is smaller than the inner-tab thickness of the inner rolled tab.