Closure assembly in a bag

Abstract

The invention relates to a closure assembly ( 1 ) comprising complementary closure sections ( 2 ) and panels ( 6 a , 6 b ) for fixing said closure assembly to the internal faces of a bag. The inventive assembly is characterised in that it comprises: sealing bands ( 11, 13 ) which are disposed on the external faces of the fixing panels ( 6 a , 6 b ); a precut or line of weakness ( 10 ) which is made in one of the fixing panels ( 6 a ) and which divides said panel ( 6 a ) into a first external part ( 61 a ) and a second internal part ( 62 a ), the sealing band on the panel being limited to the external part of same; and a sealing band ( 12 ) which is disposed on the internal face of at least one of the panels, each internal sealing band being disposed on the internal part of the fixing panels.

1 . A closure assembly ( 1 ) comprising complementary closure profiles ( 2 ) and sheets ( 6   a ,  6   b ) for fixing the closure assembly to the internal faces of a bag, characterised in that it comprises: 
 welding strips ( 11 ,  13 ) on the external faces of the fixing sheets ( 6   a ,  6   b );    a scoring or weakness line ( 10 ) formed in one of the fixing sheets ( 6   a ), the said scoring or weakness line delimiting the said fixing sheet ( 6   a ) in a first external part ( 61   a ) and a second internal part ( 62   a ), the external welding strip provided on the sheet being limited to the external part thereof;    a welding strip ( 12 ) on the internal part of at least one of the sheets, each internal welding strip being situated on the said internal part of the fixing sheets.    
   
   
       2 . An assembly according to  claim 1 , characterised in that the external welding strip of the sheet ( 6   b ) not comprising the scoring extends over the entire width of the sheet.  
   
   
       3 . An assembly according to one of claims  1  or  2 , characterised in that the external welding strip of the sheet ( 6   b ) not comprising the scoring extends solely over the external part ( 61   b ) of the sheet ( 6   b ).  
   
   
       4 . An assembly according to one of  claims 1  to  3 , characterised in that the closure profiles ( 2 ) are complementary, of the male/female type.  
   
   
       5 . An assembly according to one of  claims 1  to  4 , characterised in that the closure profiles ( 2 ) comprise a movable slider ( 4 ).  
   
   
       6 . A reclosable bag ( 20 ) comprising a body folding on itself and a mouth to which the closure assembly is fixed comprising complementary closure profiles, and sheets for fixing the closure assembly to the internal walls of the bag, characterised in that it comprises: 
 welding strips ( 11 ,  13 ) on the external faces of the fixing sheets ( 6   a ,  6   b );    a scoring or weakness line ( 10 ) formed in one of the fixing sheets ( 6   a ), the said scoring or weakness line delimiting the said fixing sheet ( 6   a ) in a first external part ( 61   a ) and a second internal part ( 62   a ), the external welding strip provided on the sheet being limited to the external part thereof;    a welding strip ( 12 ) on the internal part of at least one of the sheets, each internal welding strip being situated on the said internal part of the fixing sheets.    
   
   
       7 . A bag according to  claim 6 , characterised in that the external welding strip of the sheet ( 6   b ) not comprising the scoring extends over the entire width of the sheet.  
   
   
       8 . A bag according to one of claims  6  or  7 , characterised in that the external welding strip of the sheet ( 6   b ) not comprising the scoring extends solely over the external part ( 61   b ) of the sheet ( 6   b ).  
   
   
       9 . A bag according to one of  claims 6  to  8 , characterised in that the closure profiles ( 2 ) are complementary, of the male/female type.  
   
   
       10 . A bag according to one of  claims 6  to  9 , characterised in that the closure profiles ( 2 ) comprise a movable slider ( 4 ).  
   
   
       11 . A method of manufacturing a closure assembly comprising complementary closure profiles ( 2 ), and sheets ( 6   a ,  6   b ) for fixing the closure assembly to the internal faces of the walls ( 7 ) of the bag, according to which: 
 a scoring or weakness line ( 10 ) is formed in one of the fixing sheets ( 6   a ), the said scoring or weakness line delimiting the said fixing sheet ( 0 . 6   a ) in a first external part ( 61   a ) and a second internal part ( 62   a );    welding strips ( 11 ,  13 ) are applied to the external walls of the fixing sheets ( 6   a ,  6   b ), the external welding strip provided on the sheet comprising the weakness line or scoring being limited to the external part thereof;    welding strips ( 12 ) are applied to the internal wall of at least one of the strips in the internal part of the fixing sheets.    
   
   
       12 . A method according to  claim 11 , characterised in that it also comprises the step according to which a movable opening/closing slider is fixed to the complementary closure profiles ( 2 ).  
   
   
       13 . A method of manufacturing a reclosable bag according to which a closure assembly ( 1 ) comprising complementary closure profiles and sheets for fixing the closure assembly to the bag are fixed, characterised in that it comprises the steps according to which: 
 two walls ( 7 ) delimiting a mouth ( 3 ) are formed;    welding strips ( 11 ,  13 ) are welded to the external faces of the fixing sheets on the internal faces of the walls ( 7 ) of the bag level with the mouth, one of the sheets comprising a scoring or weakness line able to rupture at the time of first opening, the external weld provided on the said sheet being limited to the external part thereof;    the bag ( 20 ) is filled with a product;    the internal faces of the sheets ( 6   a ,  6   b ) are welded together by means of a welding strip ( 12 ) present on at least one of the sheets, each welding strip internal to the sheets being situated on the internal part of the fixing sheets.    
   
   
       14 . A method according to  claim 13 , characterised in that the filling of the bag is carried out before the fixing of the closure assembly.  
   
   
       15 . A method according to one of claims  13  or  14 , characterised in that it comprises a step according to which a movable opening/closing slider ( 4 ) is fixed to the complementary closure profiles ( 2 ).  
   
   
       16 . A method according to one of  claims 13  to  15 , characterised in that the welding of the welding strips is of the “hot melt” welding type.  
   
   
       17 . A machine for manufacturing a closure assembly comprising complementary closure profiles ( 2 ), and sheets ( 6   a ,  6   b ) for fixing the closure assembly to the internal faces of the walls of the bag ( 20 ), characterised in that it comprises: 
 means able to produce, in one of the fixing sheets, a weakness line or a scoring ( 10 ), the said weakness line or scoring delimiting the said fixing sheet in a first external part and a second internal part;    means able to apply welding strips ( 11 ,  13 ) to the external walls of the fixing sheets, the external welding strip provided on the sheet being limited to the external part thereof;    means able to apply a welding strip ( 12 ) to the internal wall of at least one of the sheets and in the internal part of the fixing sheets.    
   
   
       18 . A machine for manufacturing a reclosable bag ( 20 ) comprising means of fixing a closure assembly ( 1 ) comprising complementary closure profiles ( 2 ) and sheets ( 6   a ,  6   b ) for fixing the closure assembly to the bag, characterised in that it comprises: 
 means able to form two walls delimiting a mouth ( 3 );    means able to weld welding strips ( 11 ,  13 ) situated on the external faces of the fixing sheets on the internal faces of the walls ( 7 ) at the level of the mouth, one of the sheets comprising a scoring or weakness line able to rupture at the time of the first opening, the external weld provided on the sheet being limited to the external part thereof;    means able to fill the bag with a product;    means able to weld together the internal faces of the sheets by means of a welding strip present on at least one of the sheets, each welding strip internal to the sheets being situated on the internal part of the fixing sheets.    
   
   
       19 . A machine according to  claim 18 , characterised in that it comprises means able to effect a welding of the “hot melt” welding type.