Can comprising metal or plastic

Abstract

A can ( 1 ) made from metal or plastic including a cap ( 5 ) with an annular sealing element ( 25 ). A sealing lip ( 29 ) is formed on the sealing element that is essentially aligned radially outwardly. The lip contacts an apex (S) of the upper rim of the container ( 3 ) when the cap ( 5 ) is put on and twisted tight. In case of an overpressure inside the can ( 1 ), gas can exit by lifting the sealing lip ( 29 ). In case of a higher exterior pressure p 0 , the sealing lip ( 29 ) is pressed with greater force against the container ( 3 ) and prevents the entry of any air.

1 . A can made from metal or plastic, comprising a container ( 3 ) and a cap ( 5 ), which can be connected to the container ( 3 ) in a sealing manner and also in a resealing manner for a partial removal of the fill material in an interior of the container, a sealing element ( 25 ) located between the cap ( 5 ) and an upper edge ( 7 ) the container ( 3 ,  33 ), allowing gas to exit the container ( 3 ) in case of an increased interior pressure p 1 , and that, in case of an increased exterior pressure p 0 , blocks entry of oxygen into the interior of the container. 
   
   
       2 . A can according to  claim 1 , wherein the sealing element comprises a seal with an axially effective lip ( 29 ). 
   
   
       3 . A can according to  claim 2 , wherein the sealing element ( 25 ) is arranged in the cap ( 5 ), on the container ( 3 ), or on an interior container ( 33 ). 
   
   
       4 . A can according to  claim 2 , wherein a free edge ( 31 ) of the lip ( 29 ) is essentially aligned radially outwardly. 
   
   
       5 . A can according to  claim 2 , wherein a support body ( 27 ) at the sealing element ( 25 ) is inserted and held and/or adhered in a circumferential bead ( 23 ) in the cap ( 5 ). 
   
   
       6 . A can according to  claim 3 , wherein the sealing element ( 25 ) is assembled on the interior container ( 33 ) or produced together therewith by an injection molding process. 
   
   
       7 . A can according to  claim 2 , wherein the cap ( 5 ) and the container ( 3 ) can be snapped to each other via a snapping connection ( 17 ,  21 ) and the snapping connection is formed by snapping cams ( 17 ) on the lid ( 5 ) and snapping protrusions ( 21 ) on the container ( 3 ). 
   
   
       8 . A can according to  claim 6 , wherein the cap ( 5 ) can be snapped in place at an encircling recess ( 37 ) on the interior container ( 33 ). 
   
   
       9 . A can according to  claim 7 , wherein the snapping connection is formed by threads ( 17 ) and thread sections ( 21 ) suitably embodied on a collar ( 15 ) of the cap ( 5 ) and on the container ( 3 ). 
   
   
       10 . A can according to  claim 6 , wherein the snapping connection ( 17 ,  21 ) is embodied such that the lip ( 29 ) of the sealing element ( 25 ) is pressed against the cap ( 5 ) with a force, which allows gas to exit the container ( 3 ) at a defined pressure. 
   
   
       11 . A can according to  claim 10 , wherein in an engaged position in which the cap ( 5 ) is snapped in place, a lower edge of the collar ( 15 ) of the cap ( 5 ) contacts a step ( 9 ) at the container ( 3 ) such that a defined axial distance is provided between a the recess ( 23 ) in the cap ( 5 ) accepting the sealing element ( 25 ) and the upper edge of the container ( 3 ) which is smaller than an axial height h 1  of the sealing element ( 25 ) in a relaxed state and greater than a minimum axial height h 2  of the sealing element ( 25 ) in a compressed state.