Patent EA-003913-B1 (EA)
Title: A lid for closing a container
Inventor: JOHNSEN LARS
IPC: B65D41/04
Filed: 2000-03-17
Abstract: 1. A lid for closing a container which has a neck with means for securing the lid, wherein an outer lid consists of a top part and a cylindrical collar, which has means on the inner side for securing the lid on the neck of the container, and wherein an inner lid is provided between the outer lid and the upper edge of the container neck, characterized in that the inner lid is made of a multi-layered sheet, wherein the upper layer of the inner lid has a first relatively lower friction with the lid, while the lower layer of the inner lid has a second relatively great friction with the edge of the container collar, wherein at least one projection of the cylindrical collar of the outer lid is arranged beneath the inner lid with the upper edge of the package neck. 2. A lid according to claim 1, characterized in that the inner lid consists of a first layer for sealing against the edge of the container, wherein the first layer consists of a soft thermoplastic elastomer or polymer, and wherein the inner lid also consists of a second layer having gas barrier properties. 3. A lid according to one of claims 1 or 2, characterized in that the inner lid consists of a third layer consisting of thermoplastics which covers the second layer, said third layer making contact with the outer lid. 4. A lid according to one of claims 1-3, characterized in that the second layer consists of aluminium. 5. A lid according to one of claims 1-4, characterized in that the first layer consists of low density polyolefins. 6. A lid according to one of claims 1-5, characterized in that the first layer consists of low density polyethylenes. 7. A lid according to one of claims 1-6, characterized in that the third layer consists of polyolefins. 8. A lid according to one of claims 1-7, characterized in that the third layer consists of polyethylene. 9. A lid according to one of claims 1-8, characterized in that the third layer consists of polypropylene. 10. A lid according to one of claims 1-9, characterized in that the third layer consists of ethylene vinyl acetate plastics. 11. A lid according to one of claims 1-10, characterized in that the third layer consists of polyester. 12. A lid according to one of claims 1-11, characterized in that the diameter of the inner lid is larger than the external diameter of the package neck, but simultaneously smaller than the internal diameter of the outer lid, said projection of the collar extending radially toward the centre until the external diameter of the package neck. 13. A lid according to one of claims 1-12, characterized in that the inner lid has a hole for pressure equalization between the volume of the container and a volume between outer lid and inner lid. 14. A lid according to claim 13, characterized in that a seal sealing against the outer lid is provided around an opening in the inner lid, said outer lid having a subarea above the opening of the inner lid which is deflected by a pressure difference. 15. A lid according to one of claims 1-12, characterized in that the centre of the inner lid is secured to the outer lid with a rotatable securing means, wherein a container vacuum through the inner lid pulls the centre of the outer lid downwards, thereby deflecting a subarea of the outer lid. 16. A lid according to one of claims 1-15, characterized in that the collar of the outer lid has at least one projection which is directed radially toward the centre and which extends from the inner side, said projection, during removal of the lid, exerting an upwardly directed pressure against the edge of the inner lid at least at one point, which causes the inner lid to be lifted pointwise out of contact with the upper edge of the package neck. 17. A lid according to one of claims 1-16, characterized in that the collar of the lid has an inwardly directed annular ring as a securing means for the inner lid, said ring extending in an oblique direction relative to the inner lid. 18. A method of opening a lid according to one of claims 1-17 by its rotation on the edge of the container neck, characterized in that during opening of the container by removal of the lid a pointwise upwardly directed pressure is exerted on the edge of the inner lid, thereby creating an opening to the volume of the container which is thereby vented.