Patent ID: 6053344
Filing Date: 2000-04-25
Classification: B65D,Y10S

Abstract:
A tamper-indicating closure of integrally molded plastic construction, which comprises:a base wall having a peripheral skirt with an internal thread for engaging an external thread on a container finish and an internal wall surface on a side of said thread remote from said base wall,a circumferential array of bridges integrally extending axially along and projecting radially inwardly from said internal surface, at least one of said bridges having a greater circumferential dimension than other of said bridges,a score extending circumferentially around said skirt and radially into said skirt to separate a tamper-indicating band from a lower portion of said skirt, said band remaining integrally connected to said skirt by said bridges,a thin membrane in said band immediately circumferentially adjacent to said one bridge and extending both axially and circumferentially of said band, anda stop flange that extends axially and radially from said band for engaging a bead on a container to inhibit removal of said closure, said stop flange containing a gap in radial alignment with said membrane for both weakening said stop flange and permitting passage of mold tooling from said membrane, such that said membrane and said other bridges rupture upon removal of the closure but said band remains connected to said closure by said one bridge,said membrane having a geometry viewed radially of the closure selected from the group consisting of a trapezoid having an edge spaced from said skirt that angles axially away from said one bridge, and a right triangle with a base extending along said skirt.