Closure device for a container and a container equipped with one such device

Abstract

The invention relates to a closure device ( 1 ) for a container. The inventive device comprises a cover ( 2 ) which is equipped with an inner skirt ( 24 ) that can rest against the internal radial surface (G 2 ) of the neck (G) of a bottle (B). The base ( 23 ) of the cover ( 2 ) is provided with a first layer ( 5 ) of material which is impervious to one or more pre-determined gases and a second layer ( 6 ) which covers the first layer and which is made from a material that can absorb one or more pre-determined gases, preferably an oxygen-absorbing material.

1 . Closure device for a container provided with a neck, said device comprising a stopper ( 2 ;  102 ) provided with an inner skirt ( 24 ;  124 ) adapted to come into abutment against the internal radial surface (G 2 ) of said neck (G) said device being provided, at the level of the base ( 22 ;  122 ) of said stopper ( 2 ;  102 ), with a first layer ( 5 ;  105 ) of material impermeable to one or more predetermined gases and with a second layer ( 6 ;  106 ) made of a material adapted to absorb one or more predetermined gases, preferably a material adapted to absorb the oxygen, characterized in that said first and second layers ( 5 ,  6 ;  105 ,  106 ) are arranged, with respect to the base ( 22 ;  122 ) of said stopper, so that one of them ( 6 ,  105 ) covers the other ( 5 ,  106 ).  
   
   
       2 . Device according to  claim 1 , characterized in that said first and second layers ( 5 ,  6 ;  105 ,  106 ) extend at least at the level of a part (Z 26 ) of said base ( 22 ;  122 ) located radially inside said skirt ( 24 ;  124 ).  
   
   
       3 . Device according to  claim 1 , characterized in that said first and second layers ( 5 ,  6 ) are affixed on the internal face ( 23 ) of said base ( 22 ), said second layer covering said first layer.  
   
   
       4 . Device according to  claim 3 , characterized in that said internal face ( 23 ) is provided with a rib ( 26 ) defining a volume (Z 26 ) for receiving said first and second layers ( 5 ,  6 ).  
   
   
       5 . Device according to  claim 1 , characterized in that said first layer ( 105 ) is formed on an external face ( 128 ) of said base ( 122 ), while said second layer ( 106 ) is formed on an internal face ( 123 ) of said base, said first layer ( 105 ) covering said second layer ( 106 ) with the interposition of said base ( 122 ).  
   
   
       6 . Device according to  claim 1 , characterized in that said second layer ( 6 ;  106 ) is disposed radially inside said skirt ( 24 ;  124 ).  
   
   
       7 . Device according to  claim 1 , characterized in that said first and second layers ( 5 ,  6 ;  105 ,  106 ) are formed by different materials.  
   
   
       8 . Device according to one of the  claim 1 , characterized in that said first layer ( 5 ;  105 ) is made of polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), ethylene vinyl alcohol (EVOH), polyamide (PA), polyethylene naphthalate (PEN), polyvinyl alcohol (PVA), acrylate copolymer of polyacrylnitrile _(PNA) type, polymethylmethacrylate (PPMA), butadiene copolymer, styrene, bi-oriented polypropylene (BOPP) or of a mixture based on these products.  
   
   
       9 . Device according to  claim 1 , characterized in that said first layer ( 5 ;  105 ) comprises a silica oxide, a varnish or a lacquer or is made by metallization.  
   
   
       10 . Container for liquid, particularly bottle (B) made of plastics material, equipped with a closure device ( 1 ;  101 ) according to  claim 1.