Sealed Opening/Closing System for Packaging Bags

Abstract

An opening/closing system, particularly for packaging bags, of the type that includes a planar base part defining at least in part an opening through itself, this base part includes guide means parallel to the opening and engaging with guide means belonging to a slider designed to close the opening or leave it open, which system is characterized in that, before the system is used for the first time, the opening is closed at least partly by a layer of material, and in that the slider includes a cursor directed toward the opening and capable of at least partly destroying the layer of material to open the opening when the slider is moved for the first time.

1 . An opening/closing system, particularly for packaging bags, of the type that comprises a planar base part defining at least in part an opening through itself, this base part comprising guide means parallel to the opening and engaging with guide means belonging to a slider designed to close the opening or leave it open, which system is characterized in that, before the system is used for the first time, the opening is closed at least partly by a layer of material, and in that the slider comprises a cursor directed toward the opening and capable of at least partly destroying the layer of material to open the opening when the slider is moved for the first time.  
   
   
       2 . The system as claimed in  claim 1 , characterized in that the layer of material is part of the same molding as the base part.  
   
   
       3 . The system as claimed in  claim 1 , characterized in that the layer of material has an area of weakness where it is thinner.  
   
   
       4 . The system as claimed in  claim 1 , characterized in that the area of weakness extends approximately the full length of the opening.  
   
   
       5 . The system as claimed in  claim 1 , characterized in that a housing for the cursor is provided in the layer of material, the dimensions of this housing being slightly less than the dimensions of the cursor, and the latter being force-fitted into the housing.  
   
   
       6 . The system as claimed in  claim 1 , characterized in that the housing is situated at one end of the opening, and the cursor faces this housing in the closed position of the cursor.  
   
   
       7 . A packaging bag equipped on at least one of its walls with an opening/closing system as claimed in  claim 1 .  
   
   
       8 . The bag as claimed in  claim 7 , characterized in that the opening/closing system is attached to the inside face of one wall of the bag by the planar base part, the slide being situated on that side of the planar base which is turned toward the wall, and the system being positioned in a precut hole formed in the wall.  
   
   
       9 . A film for forming the walls of a packaging bag comprising at least one opening/closing system as claimed in  claim 1 .  
   
   
       10 . The film as claimed in  claim 9 , characterized in that it is presented in the form of a reel.