Closure
The invention concerns a closure for sealing of an orifice of a neck of a container. The closure comprises a top portion, an outer skirt and a sealing means. The sealing means comprises an outer sealing means suitable to be engaged with an outer free peripheral surface of neck. The outer sealing means comprises an annular base radially distanced to said outer skirt and at least one annular sealing ring protruding radially inwardly over said base.
1. Closure for sealing of an orifice of a neck of a container comprising:
a top portion;
an outer skirt; and
a sealing means, said sealing means comprising:
a radially deformable outer sealing means suitable to be engaged with an outer free peripheral surface of said neck, whereby said outer sealing means comprises:
an annular base radially distanced to said outer skirt by a gap; and
at least one annular sealing ring protruding radially inwardly from said base to form, when applied onto the neck of the container, a contact zone with an outer free surface of said neck positioned between 0.5 mm to 2 mm below the annular end surface of the neck.
2. Closure according to claim 1 , wherein the sealing means is radially freestanding when applied onto the neck of the container.
3. Closure according to claim 1 , wherein the inside and the outside free length of the outer sealing means are equal.
4. Closure according to claim 1 , wherein the outside free length of the outer sealing means is shorter than its inside free length.
5. Closure according to claim 1 , wherein the base is arranged in general perpendicular to the top portion.
6. Closure according to claim 1 , wherein said base has a constant thickness.
7. Closure according to claim 1 wherein said base has a variable thickness.
8. Closure according to claim 1 , wherein the outer sealing means comprises two vertically distanced annular sealing rings.
9. Closure according to claim 1 , wherein the sealing means further comprises at least one annular top seal.
10. Closure according to claim 9 , wherein the top seal has a symmetric V-shape or an asymmetric V-shape with a first cylindrical and a second conical surface.
11. Closure according to claim 1 , wherein the sealing means further comprises a bore seal arranged radially distanced to the outer sealing means.
12. Closure according to claim 11 , wherein the bore seal comprises an inner supporting and an outer sealing leg.
13. Closure according to claim 1 , wherein the outer sealing means is made at least partially out of a different material then the outer skirt of the closure.
14. Closure according to claim 2 , wherein the outside free length of the outer sealing means is shorter than its inside free length.
15. Closure according to claim 2 , wherein said base has a variable thickness.
16. Closure according to claim 1 , wherein the sealing means comprises a blend having a radius R, said blend forming an outer top seal when applied onto the neck of a container.