Patent ID: 7581651
Filing Date: 2009-09-01
Classification: B65D,Y10S

Abstract:
1. A metallic pilfer-proof cap, comprising: a skirt portion in which a weakening portion includes horizontal slits and bridges alternately in a circumferential direction of the cap so that a lower portion of the skirt portion can be separated from the skirt portion and can remain as a ring shaped pilfer-proof band around a container mouth when the cap is opened, wherein the horizontal slits are formed by shearing the skirt portion in a transverse direction intermittently from an outside to offset portions above a shearing plane radially inwardly to the cap from a portion below the shearing plane of the horizontal slits, thereby forming the bridges above the shearing plane, an internal diameter of an upper end portion of the pilfer-proof band located below the shearing plane is larger than the maximum external diameter of an annular bulging portion formed at the container mouth, a lower portion of the pilfer-proof band is seamed to fit to the annular bulging portion to prevent the pilfer-proof band from moving upward when the cap is opened, and the pilfer-proof band includes a lower bead portion at the upper end portion thereof below the weakening portion, which protrudes outwardly with respect to a top edge of the pilfer-proof band.