Patent ID: 8833590
Filing Date: 2014-09-16
Classification: B65D

Abstract:
1. A metallic container closure shell prior to thread formation having a circular top panel wall and a cylindrical skirt wall hanging down from a circumferential edge of the top panel wall, and a synthetic resin liner arranged in the shell, the skirt wall of the shell having a thread-forming region and an annular groove positioned at an upper end portion of the thread-forming region, wherein: an internal pressure release line inclusive of a slit extending in the circumferential direction is arranged in the skirt wall at a portion over the annular groove, and an annular bead is arranged so as to pass through between the internal pressure release line and the annular groove; wherein the annular bead extends in the horizontal direction, and wherein a knurling is formed over the annular groove of the skirt wall and the internal pressure release line is formed at the upper end of the knurling.