Plastic container structure

Abstract

The present invention relates to a plastic container structure ( 1 ) comprising a lid ( 2 ), a gasket ( 3 ), and a container ( 4 ). The lid ( 2 ) is configured to be attached to the container ( 4 ) to close it by movement of the lid ( 2 ) relative to the container ( 4 ) along an engagement direction (D). The container ( 4 ) has an opening defined by a circumferential flange ( 5 ) having a circumferential seat ( 6 ) for receiving the gasket ( 3 ). Also, the lid ( 2 ) has a circumferential wall ( 7 ) configured to surround the circumferential flange ( 5 ) of the container ( 4 ). The seat ( 6 ) is provided on the outside of the flange ( 5 ) of the container ( 4 ) opposite the circumferential wall ( 7 ) of the lid ( 2 ) and the seat ( 6 ) and the circumferential wall ( 7 ) of the lid ( 2 ) are configured such that the gasket ( 3 ) is compressed between the circumferential wall ( 7 ) of the lid ( 2 ) and the seat ( 6 ) of the container ( 4 ). The circumferential flange ( 5 ) of the container and/or the wall ( 7 ) of the lid ( 2 ) are convex in a plane substantially perpendicular to the engagement direction (D).

1 . A plastic container structure ( 1 ) comprising:
 a container, a gasket, and a lid configured to be attached to said container to close it by movement of the lid relative to the container along an engagement direction,   wherein the container has an opening defined by a circumferential flange having a circumferential seat for receiving the gasket,   wherein the lid has a circumferential wall configured to surround the circumferential flange of the container, wherein the seat is provided on the outside of the flange of the container opposite the circumferential wall of the lid, and wherein the seat and the circumferential wall of the lid are configured such that the gasket is compressed between the circumferential wall of the lid and the seat of the container,   wherein the circumferential flange of the container and/or the wall of the lid are convex in a plane substantially perpendicular to the engagement direction.   
     
     
         2 . The plastic container structure according to  claim 1 , wherein the lid is further provided with support means, said support means being configured to contact the flange of the container from the inside of the container such that movement of the flange of the container due to forces from compression of the gasket is prevented. 
     
     
         3 . The plastic container structure according to  claim 2 , wherein said support means comprises a ridge extending at a distance from and parallel to the circumferential wall of the lid. 
     
     
         4 . The plastic container structure according to  claim 2 , wherein the support means are convex in a plane substantially perpendicular to the engagement direction. 
     
     
         5 . The plastic container structure according to  claim 1 , wherein the circumferential wall of the lid extends a distance past the gasket substantially along said engagement direction, and wherein an end portion of the circumferential wall of the lid is provided with engagement means for interlocking engagement with corresponding interlocking means of the container, said engagement and interlocking means being configured to prevent the lid from moving away from the container along the engagement direction. 
     
     
         6 . The plastic container structure according to  claim 5 , wherein said engagement means comprises a protrusion extending along the circumferential wall of the lid on the inner side of the lid. 
     
     
         7 . The plastic container structure according to  claim 5 , wherein said interlocking means of the container comprises a flange extending from the circumferential flange of the container substantially along said engagement direction. 
     
     
         8 . The plastic container structure according to  claim 7 , wherein said flange of the interlocking means of the container is outwardly slanted away from the circumferential flange of the container. 
     
     
         9 . The plastic container structure according to  claim 1 , wherein the gasket is an O-ring.