Nozzle and container for dispensing a liquid

1. A liquid dispensing tip for mounting on a container, said tip comprising a valve which, in rest position, seals off the container by separating an upstream volume from a downstream volume, said valve being able to withstand opening maneuvers by elastic deformation, said valve comprising a support and a membrane that is mobile in relation to the support, each of the support and the membrane including a bearing zone against each other, arranged so that, when the valve is in rest position, the bearing zones of the support and the membrane bear at least partially against one another forming a surface barrier separating the upstream volume from the downstream volume, at least one of the support or the membrane being such that after one or several opening maneuvers, said surface barrier no longer covers the same part of the bearing zone of at least one of the support or the membrane, said tip further comprising an anti-microbial material on at least one of the support or the membrane, the anti-microbial material being only on the bearing zone of the at least one of the support or the membrane or on the at least one of the support or the membrane in the immediate proximity of its bearing zone, such that the entire surface of the dispensing tip in contact with the upstream volume when the valve is in rest position is free of anti-microbial material, wherein the support includes a part, including the anti-bacterial material, located only in a central region of the support excluding edges of an upper face of the support.

2. The tip according to claim 1 , wherein part of the support including the anti-bacterial material is molded together to a remainder of the support being made of a second material free of anti-microbial material.

3. The tip according to claim 1 , wherein the part of the support comprises an insert.

4. The tip according to claim 3 , wherein the insert is made of bulk anti-bacterial material.

5. The tip according to claim 3 , wherein the insert is coated externally by a layer of anti-bacterial material.

6. The tip according to claim 3 , wherein only the face of the insert turned toward the outside is coated with a layer of anti-bacterial material.

7. The tip according to claim 3 , wherein the insert is flush with the bearing zone of the support or the membrane.

8. The tip according to claim 3 , wherein the insert protrudes from the bearing zone of the support or the membrane so as to form a pin passing through an opening of the valve.

9. The tip according to claim 1 , wherein the distance between the bearing zone and the anti-microbial material is less than 3 mm.

10. The tip according to claim 9 , wherein the distance between the bearing zone and the anti-microbial material is less than 1 mm.

11. A liquid dispensing recipient including a reservoir on which a dispensing tip is mounted according to claim 1 .

12. A liquid dispensing tip for mounting on a container, said tip comprising a valve which, in rest position, seals off the container by separating an upstream volume from a downstream volume, said valve being able to withstand opening maneuvers by elastic deformation, said valve comprising a support and a membrane that is mobile in relation to the support, each of the support and the membrane including a bearing zone against each other, arranged so that, when the valve is in rest position, the bearing zones of the support and the membrane bear at least partially against one another forming a surface barrier separating the upstream volume from the downstream volume, at least one of the support or the membrane being such that after one or several opening maneuvers, said surface barrier no longer covers the same part of the bearing zone of at least one of the support or the membrane, wherein at least one of the support or the membrane bears an anti-microbial material on or in the immediate proximity of a part of its bearing zone, and wherein the entire surface of the dispensing tip in contact with the upstream volume when the valve is in rest position is free of anti-microbial material, wherein one of the support or the membrane is coated, on a face bearing the anti-microbial material, with a layer of non anti-bacterial insulating material in its parts located upstream from the valve.

13. A liquid dispensing tip for mounting on a container, said tip comprising a valve which, in rest position, seals off the container by separating an upstream volume from a downstream volume, said valve being able to withstand opening maneuvers by elastic deformation, said valve comprising a support and a membrane that is mobile in relation to the support, each of the support and the membrane including a bearing zone against each other, arranged so that, when the valve is in rest position, the bearing zones of the support and the membrane bear at least partially against one another forming a surface barrier separating the upstream volume from the downstream volume, at least one of the support or the membrane being such that after one or several opening maneuvers, said surface barrier no longer covers the same part of the bearing zone of at least one of the support or the membrane, said tip further comprising an anti-microbial material on the support, wherein the support is a sealing pin substantially cylindrical in shape and the membrane comprises a cylindrical part capping the pin and leaving an annular gap around it forming a flow channel, and wherein the surface barrier has a substantially annular shape, the anti-microbial material being a layer present only on an upper face of the support, such that the entire surface of the dispensing tip in contact with the upstream volume when the valve is in rest position is free of anti-microbial material.

14. The tip according to claim 13 , wherein the layer covers an entirety of the upper surface of the support.

15. The tip according to claim 13 , wherein the layer covers only a portion of the upper surface of the support, the portion being adjacent to an opening in the membrane.