| 主权项 |
1. A single-piece, molded, plastic, closure comprising:
a circular, closure panel having an internal surface; a cylindrical skirt extending from the top panel to a tamper band attached thereto, the skirt including a plurality of external raised ribs and an interior threaded portion engageable with respective threads on a container; and a seal portion including an inclined seal ring extending from the internal surface and concentric with the skirt, a vertical seal ring extending from the internal surface between the inclined seal ring and the skirt and concentric with the skirt, and a top-edge seal ring extending from the internal surface between the inclined seal ring and the vertical seal ring, the inclined seal ring extending further than the vertical and top-edge seal rings, and vertical seal ring extending further than the top-edge seal ring, the inclined seal ring including a first flat wall facing away from the skirt, and a first seal wall facing toward the skirt, the first seal wall including a first contact ring which creates a first seal with an associated container, the first seal wall including a first wall portion extending from the interior surface toward the first contact ring, the first flat wall extending from the internal surface at a first angle between 95 and 115 degrees, with a second angle between the first wall portion and the interior surface being less than the first angle, the vertical seal ring including a second flat wall facing toward the skirt, and a second seal wall facing away from the skirt, the second seal wall including a second contact ring which creates a second seal with an associated container, the second seal wall including a second wall portion extending from the interior surface toward the second contact ring, the second flat wall extending from the internal surface at a third angle between 85 and 90 degrees, with a fourth angle between the second wall portion and the interior surface being greater than the third angle. |
