Patent ID: 8689990
Filing Date: 2014-04-08
Classification: B65D

Abstract:
1. A metal cap comprising: a top plate section that is disposed above, a cylindrical section that substantially hangs down from a rim of said top plate section, and a liner for sealing a mouth of a bottle after the liner has been inserted onto an inner surface of said top plate in a non-adhering state; wherein said cylindrical section has vent holes in the vicinity of said top plate section which are formed with a slit-like opening in the circumferential direction, and which release internal pressure during unsealing, and upper protrusions and lower protrusions formed by bending an upper opening end and a lower opening end of said vent hole inward in the radial direction of said cylindrical section; wherein a distal end of said upper protrusion is positioned further inward in the radial direction than an outer rim of said inserted liner, and is also positioned at the same position in the radial direction as a distal end of said lower protrusion, or further outward in the radial direction than said distal end of said lower protrusion.