초록 ▼

A container closure assembly including a container neck having a first screw thread, a radially projecting bead located below the first screw thread, and one or more ratchet projections located below the radially projecting bead. The container closure further includes a closure having a skirt portio

A container closure assembly including a container neck having a first screw thread, a radially projecting bead located below the first screw thread, and one or more ratchet projections located below the radially projecting bead. The container closure further includes a closure having a skirt portion with a second screw thread complementary to the first screw thread for securing the closure on the container neck. A tamper evident ring is joined to the skirt portion by severable connections and includes a generally annular collar for the neck, an opening or recess formed in the collar, wherein a portion of an edge of the opening or recess is attached to a tab. The tab is inclined radially inwardly and obliquely relative to a central axis of the ring and flexes relative to the collar in a radially outward direction. The ratchet projections allow rotation of the tamper evident ring in a screwing direction on the neck, but block rotation of the tamper evident ring in an unscrewing direction by abutment with the tab, whereby, when the closure is initially screwed onto the container neck, the tab flexes outwardly to allow the tamper evident ring to pass over the bead, and then rotates past the ratchet projections as the tamper evident ring is rotated in the screwing down direction. When the closure is unscrewed from the container neck for the first time, the tab abuts against an underside of the bead and also against the ratchet projections to exert axial and circumferential breaking forces on the tamper evident ring.

대표청구항 ▼

[ We claim:] [1.] A container closure assembly comprising:a container neck comprising a first screw thread, a radially projecting bead located below said first screw thread , and one or more ratchet projections located below said radially projecting bead;a closure comprising a crown portion and a sk

[ We claim:] [1.] A container closure assembly comprising:a container neck comprising a first screw thread, a radially projecting bead located below said first screw thread , and one or more ratchet projections located below said radially projecting bead;a closure comprising a crown portion and a skirt portion, said skirt portion being provided with a second screw thread complementary to said first screw thread for securing said closure on said container neck;a tamper evident ring joined to said closure skirt portion by severable connections and comprising a generally annular collar for said neck, an opening or recess formed in said collar, wherein said opening or recess is bounded by an edge formed in said collar, wherein a portion of said edge is attached to a tab, said tab extending from said collar and being inclined radially inwardly and obliquely relative to a central axis of said ring, wherein said opening or recess defines a clearance in said collar to permit said tab to flex relative to said collar in a radially outward direction;said ratchet projections being configured to allow rotation of said tamper evident ring in a screwing direction on said neck, but to block rotation of said tamper evident ring in an unscrewing direction by abutment with said tab,whereby, when said closure is initially screwed onto said container neck, said tab flexes outwardly to allow said tamper evident ring to pass over said bead without breaking said severable connections, and said tab then rotates past said ratchet projections as said tamper evident ring is rotated in said screwing down direction; andwhereby, when said closure is unscrewed from said container neck for the first time, said tab abuts against an underside of said bead and also against said ratchet projections to exert axial and circumferential breaking forces on said tamper evident ring to sever said tamper evident ring from said closure at said severable connections.