Composite lined closure
View Patent ↗A composite lined closure for use with a container having a container neck crown includes a top having a periphery and an underside, a skirt depending downward from the periphery, the skirt including an inner surface and a locking bead radially extending inward from the skirt, and a resilient seal liner extending along the underside and along the inner surface above the sealing bead. Preferably, the liner is formed of an elastomeric material. A method of using the composite lined closure is also described.
1. A composite lined closure for use with a container having a container neck crown, said composite lined closure comprising:
a top having a periphery, an underside, a central well, and a surface closing said well;
a skirt depending downward from said periphery, said skirt including an inner surface and a locking bead radially extending inward from said skirt; and
a resilient seal liner extending along said underside, down said inner surface and to said locking bead, said liner having an arcuate inner surface, a lower portion of said arcuate inner surface disposed radially inward below said container neck crown when said closure is applied to said container;
wherein said surface closing said well is a membrane monolithically formed with said liner and wherein one or more liner legs are provided to allow material forming the liner to run from the liner to the membrane during the molding process.
2. A closure according to claim 1 , wherein said liner is formed of an elastomeric material.
3. A closure according to claim 2 , wherein said liner is injection molded on said inner surface of said skirt.
4. A closure according to claim 2 , wherein said closure is injection molded low-density polyethylene.
5. A closure according to claim 4 , wherein said liner is injection molded on said inner surface of said skirt.
6. A closure according to claim 1 , wherein said arcuate inner surface is shaped to conform with the crown of a five-gallon water bottle.
7. A closure according to claim 1 , wherein said skirt further includes a plurality of gussets that extend at an angle from a lower portion of said skirt upwardly into an adjacent bottom portion of said locking bead.
8. A closure according to claim 1 , wherein said skirt includes a bottom edge, said closure further comprising a tear tab extending downward from said bottom edge and a pair of tear lines extending from said bottom edge, along said skirt and above said locking bead.
9. A closure according to claim 8 , wherein said tear lines begin adjacent said tear tab, extend upwardly and diverge from one another below said locking bead.
10. A closure according to claim 9 , wherein said tear lines form a tear strip therebetween, a lower portion of said tear strip being substantially the width of said tear tab while an upper portion of said tear strip is greater than twice the width of said tear tab.
11. A closure according to claim 10 , wherein the width of said upper portion is approximately three times the width of said tear tab.
12. A closure according to claim 1 , wherein said liner is formed of a thermoplastic elastomer.
13. A closure according to claim 1 , wherein said membrane forms an inverted cone.
14. A closure according to claim 13 , wherein said inverted cone includes one or more radially extending fingers extending from a lower edge of the well and along or through said membrane.