Method of making a tamper-indicating closure
View Patent ↗A tamper-indicating closure for a beverage package includes a base wall having a peripheral skirt with at least one internal thread for securing the closure to a container. A tamper-indicating band is frangibly connected to an edge of the skirt, and a stop flange extends axially and radially from an edge of the band for abutment with a stop bead on the container finish. A plurality of circumferentially spaced drain openings extend axially through the juncture of the band and the flange. A plurality of circumferentially spaced channels extend axially through the internal thread on the closure skirt, with at least some of the channels being axially aligned with the drain openings. The stop bead on the container is in the form of a plurality of circumferentially spaced bead segments separated from each other by circumferential gaps. Liquid product may readily drain from between the container finish and the closure skirt through the axial channels in the closure thread, through the drain openings at the juncture of the closure flange and band, and through the gaps between the stop bead segments on the container finish. The container finish may also have a support flange with drain channels or slots aligned with the gaps in the bead.
1. A method of making a tamper-indicating closure that comprises the step of:
integrally molding a closure of plastic as-molded construction that includes a base wall having a peripheral skirt with an at least one internal thread for affixing the closure to a container, a tamper-indicating band connected to an edge of said skirt, a stop element extending from said band, and a plurality of circumferentially spaced drain openings extending axially through said stop element,
wherein said step of molding said closure is such that:
(a) a plurality of circumferentially spaced channels are formed extending axially through said thread, at least some of said channels being axially aligned with said drain openings,
(b) said drain openings are uniformly circumferentially spaced around said closure, and said channels are non-uniformly circumferentially spaced around said closure, and
(c) said thread has a lead-in adjacent to said base wall, and said channels are at lesser circumferential spacing from each other at said lead-in than spaced from said lead-in.
2. The method set forth in claim 1 wherein said at least one internal thread comprises a double thread having diametrically opposed lead-ins, and wherein said channels are at lesser spacing from each other at said diametrically opposed lead-ins than spaced from said lead-ins.
3. The method set forth in claim 1 wherein said stop element comprises a stop flange that extends axially and radially from an end of said band, said drain openings being disposed at a juncture of said flange and said band.