Sealing device, receptacle fitted with one such device and method for the production

Abstract

The device ( 100 ) consists of a stopper ( 121 ) which can close the neck ( 101 ) of a receptacle and an inner capsule ( 122 ) which can be glued to or sealed on the edge ( 113 ) of the neck. It also comprises: a sealing disk ( 121 ), making up the stopper or kinematically connected thereto, on which the inner capsule is fixed ( 122 ), protruding radially outside the neck ( 1 ) and a ring ( 124 ) provided with an inner thread ( 341 ) which is able to cooperate with the outer thread ( 111 ) of the neck ( 101 ), said ring ( 324 ) being fitted with a stop ( 344 ) which extends from one edge ( 345 ) according to an axial direction (X-X′) and which can exert a pushing effort (F 3 ) on the disc ( 121 ) in the direction in which the disk is spaced ( 121 ) in relation to the neck ( 101 ).

1 . Device for sealing a receptacle provided with a threaded neck, this device comprising: 
 a stopper ( 125 ) adapted to close said neck ( 101 ),    an inner capsule ( 122 ) adapted to be glued to or sealed on the edge of said neck,    a sealing disc ( 121 ) on which said inner capsule ( 122 ) is fixed, and projecting radially (D 121 /D 115 ) outside said neck ( 101 ), and    a ring provided with an inner thread ( 341 ) adapted to cooperate with the outer thread ( 111 ) of said neck, said ring being fitted with at least one projection ( 344 ,  344 ′,  344 ″) extending in the direction of said disc ( 121 ) and adapted to exert a pushing effort (F 3 ) on said disc in a direction in which said disc is spaced in relation to said neck, characterized in that said projection ( 344 ,  344 ′,  344 ″) extends, from an edge ( 345 ) of said ring ( 124 ), essentially in an axial direction (X-X′).    
   
   
       2 . Device according to  claim 1 , characterized in that said stopper is a cap ( 125 ) adapted to cover said neck ( 101 ), said disc ( 121 ) being disposed in the vicinity of the inner face ( 353 ) of the bottom ( 351 ) of said cap and maintained in place by said ring ( 124 ), itself fast in rotation with an annular skirt ( 352 ) of said cap.  
   
   
       3 . Device according to  claim 2 , characterized in that said ring ( 124 ) is provided, on its outer radial face ( 347 ), with elements in relief ( 346 ) adapted to come into engagement with elements in relief ( 354 ) of corresponding shape formed on the inner radial face ( 355 ) of said skirt ( 352 ).  
   
   
       4 . Device according to  claim 1 , characterized in that said projection ( 344 ,  344 ′,  344 ″) forms an inclined ramp ( 344   b ) allowing a progressive application of said effort (F 3 ), as a function of the rotation of said ring.  
   
   
       5 . Receptacle for liquid, particularly bottle (B) made of plastics material, fitted with a sealing device ( 102 ) according to  claim 1 .  
   
   
       6 . Method for producing a sealing device for a receptacle provided with s threaded neck, in which are carried out steps consisting in: 
 a) manufacturing a ring ( 124 ) provided with an inner thread ( 341 ) adapted to cooperate with the outer thread ( 111 ) of said neck ( 101 );    b) manufacturing a sealing disc ( 121 ); characterized in that it comprises steps consisting in:    c) providing said ring, on its outer radial surface ( 347 ), with elements in relief ( 346 );    d) providing said ring with at least one projection ( 344 ,  344 ′,  344 ″) extending, from one edge ( 345 ) of said ring, essentially in an axial direction (X-X′);    e) manufacturing a cap ( 125 ) adapted to cover said neck ( 101 ) and said ring ( 124 ) screwed on said neck;    f) providing said cap, on its inner radial surface ( 355 ), with elements in relief ( 354 );    g) introducing said sealing disc ( 121 ) in said cap;    h) introducing said ring ( 124 ) in said cap ( 125 ), bringing the elements in relief ( 346 ,  354 ), respectively provided on the outer radial surface ( 347 ) of the ring and on the inner radial surface ( 355 ) of the cap, into engagement, by directing said projections ( 344 ,  344 ′,  344 ″) towards said disc and by blocking said disc in said cap thanks to said ring.    
   
   
       7 . Method according to  claim 6 , characterized in that steps c) and d) are carried out at the same time as step a) which is a step of moulding said ring ( 24 ).  
   
   
       8 . Method according to  claim 6 , characterized in that step f) is carried out at the same time as step e) which is a step of moulding said cap ( 125 ).  
   
   
       9 . Method according to  claim 6 , characterized in that, during steps a) to f), the ring ( 124 ), the cap ( 125 ), the disc ( 121 ) and the projection ( 344 ,  344 ′,  344 ″) are dimensioned and positioned so that said projection is adapted to separate (F 3 ) said disc from said neck, while said device ( 102 ) is being unscrewed with respect to the neck ( 101 ).  
   
   
       10 . Method for sealing a receptacle by means of a device manufactured in accordance with  claim 6 , characterized in that it comprises a step of fixing said disc ( 121 ) on said neck ( 101 ), after said device ( 102 ) has been positioned on said neck, particularly by heat-sealing an inner capsule ( 122 ) borne by said disc on said neck.