Patent ID: 9694946
Date: 2017-07-04
CPC Classifications: B65D

Claim:
1. A metal closure comprising: a top wall; a skirt extending downwards from a peripheral edge of the top wall, the skirt having a first end attached to the top wall and a second end defined by a lower edge, the lower edge radially defined between an exterior surface and an interior surface; and five radially inwardly extending lugs located at positions about the lower edge such that a midpoint of each lug is spaced approximately 72 degrees±1 degree from a midpoint of an adjacent lug as measured from a center of the closure, the interior surface of the lower edge at the positions of the lugs extending radially inwards relative to the interior surface of the lower edge of the skirt adjacent the lugs; each of the lugs having a first end and a second end, the width of each lug as measured in a radial direction being greater at the first end than at the second end; wherein an angle between a first end of a first lug and a second end of an adjacent lug as measured from the center of the closure is between approximately 30 degrees and 50 degrees; wherein each of the five lugs has a length as measured in a circumferential direction of approximately 0.75 inches and the plurality of lugs occupy at least 25% of the length of the perimeter of the lower edge; and a thread engagement surface formed on an upper surface of each lug, the thread engagement surface inclined upwards along a radially extending surface extending from the lug first end to the lug second end.