Closure of bags and the like

Abstract

A closure is provided for a plastics bag or pouch, especially for holding powdered materials, comprising two opposing sets of projecting legs ( 12, 22 ), each of which is provided with external protrusions ( 14, 24 ) so that the respective legs interlock with each other when the two sets of legs are pressed together.

1 . A closure for a plastics bag, pouch or the like, comprising first and second films of plastics material having respective first and second surfaces in opposing relationship, a first plurality of legs projecting from said first surface, and a second plurality of legs projecting from said second surface, wherein each leg is provided with surface protrusions which are arranged to interlock with protrusions of legs of the other plurality of legs when the surfaces are brought towards each other.  
     
     
         2 . A closure as claimed in  claim 1 , wherein each leg is thickest at the root where it joins the film surface.  
     
     
         3 . A closure as claimed in  claim 1  or  2 , wherein each leg is of tapered reducing cross-section in the direction away from the root where it joins the film surface.  
     
     
         4 . A closure as claimed in any preceding claim, in which the protrusions are arranged randomly on the legs.  
     
     
         5 . A closure as claimed in any preceding claim, in which each film is provided with three legs.  
     
     
         6 . A closure as claimed in any preceding claim, in which the protrusions are formed as separate nodules on the legs.  
     
     
         7 . A closure as claimed in any of  claims 1  to  5 , in which the protrusions are formed as circumferential ribs on the legs.  
     
     
         8 . A bag or pouch of plastics material having a reclosable closure, the closure being provided on the inside of opposing surfaces of the bag or pouch and comprising a first plurality of legs projecting from one of said surfaces and a second plurality of legs projecting from the other of said surfaces, wherein each leg is provided with surface protrusions which are arranged to interlock with the protrusions of legs of the other plurality of legs when the bag or pouch is closed.  
     
     
         9 . A bag or pouch as claimed in  claim 8 , wherein each leg is thicker at its root than in its outwardly protecting portion.  
     
     
         10 . A bag or pouch as claimed in  claim 8  or  9 , wherein the legs are provided with randomly arranged protrusions.