Bags comprising closure profiles operated by a slider

Abstract

The present invention relates to a bag having closure profiles combined with a slider ( 20 ), characterized in that an end weld ( 3 ) made between the closure profiles is shaped according to a geometry which is the complement of the slider ( 20 ). The invention also relates to a closure assembly, a method and a machine for manufacturing such a bag.

1 . Bag having closure profiles combined with a slider ( 20 ), characterized in that an end weld ( 30 ) made between the closure profiles is shaped according to a geometry which is the complement of the slider ( 20 ).  
     
     
         2 . Bag according to  claim 1 , characterized in that the weld ( 30 ) has, after shaping, a plane face orthogonal to the direction of movement of the slider ( 20 ).  
     
     
         3 . Bag according to either of claims  1  and  2 , characterized in that the slider ( 20 ) has a plate ( 22 ) which bears, on one face, two side flanges ( 24 ,  26 ) and a central separating rib ( 28 ) which defines, in combination with the side flanges ( 24 ,  26 ) two convergent/divergent passages depending on the direction in question, intended to receive respectively one of the profiles.  
     
     
         4 . Closure assembly, comprising closure profiles combined with a slider ( 20 ), characterized in that an end weld ( 30 ) made between the closure profiles is shaped according to a geometry which is the complement of the slider ( 20 ).  
     
     
         5 . Assembly according to  claim 4 , characterized in that the weld ( 30 ) has, after shaping, a plane face orthogonal to the direction of movement of the slider ( 20 ).  
     
     
         6 . Assembly according to either of claims  4  and  5 , characterized in that the slider ( 20 ) has a plate ( 22 ) which bears, on one face, two side flanges ( 24 ,  26 ) and a central separating rib ( 28 ) which defines, in combination with the side flanges ( 24 ,  26 ), two convergent/divergent passages depending on the direction in question, intended to receive respectively one of the profiles.  
     
     
         7 . Method of producing bags, characterized in that it comprises the step which consists in shaping an end weld ( 30 ) of closure profiles, in the hot welding state, according to a geometry which is the complement of a slider ( 20 ).  
     
     
         8 . Method according to  claim 7 , characterized in that the shaping of the weld ( 30 ) consists in pressing the slider ( 20 ) on the weld ( 30 ), in the hot welding state, in order to “mould” the weld ( 30 ) on the slider ( 20 ).  
     
     
         9 . Method according to  claim 7 , characterized in that the weld ( 30 ) is shaped using an indentation similar to the slider ( 20 ).  
     
     
         10 . Method according to  claim 9 , characterized in that the indentation is a heating indentation.  
     
     
         11 . Method according to one of  claims 7  to  10 , characterized in that the shaping is carried out just after forming the weld ( 30 ), when the latter is still in the soft state.  
     
     
         12 . Machine for manufacturing bags, characterized in that it comprises means capable of shaping an end weld ( 30 ) made between closure profiles, according to a geometry which is the complement of a slider ( 20 ).