Container Closures

Abstract

A moulded closure base includes a sidewall and a top plate. The sidewall has a retention projection having a retention surface for engaging a complementary projection on a container neck. The top plate has one or more access slots through which part of a die extends during moulding to form the retention surface.

1 - 49 . (canceled) 
     
     
         50 . A non-removable base for providing at least part of a container closure, the base comprising a sidewall with a foldable retention flap, the flap movable from a first, unfolded position to a second, folded position in which it is engageable with a container neck retention projection to prevent removal of the closure. 
     
     
         51 . The base as claimed in  claim 50 , in which the flap is provided at an end of the sidewall. 
     
     
         52 . The base as claimed in  claim 50 , in which the flap is formed integrally with the sidewall. 
     
     
         53 . The base as claimed in  claim 50 , in which the base includes a top plate from which the sidewall depends. 
     
     
         54 . The base as claimed in  claim 53 , in which in the unfolded position the flap projects radially inwardly of the sidewall and projects downwardly with respect to the top plate, and in the folded position the flap projects radially inwardly of the sidewall and projects towards the top plate. 
     
     
         55 . A base as claimed in  claim 50 , in which the flap is a continuous annulus. 
     
     
         56 . The base as claimed in  claim 50 , in which the flap comprises a plurality of flap sections. 
     
     
         57 . The base as claimed in  claim 50 , in which the flap is movable upon application of the closure to a container. 
     
     
         58 . The base as claimed in  claim 50 , in which the sidewall is substantially solid. 
     
     
         59 . The base as claimed in  claim 50 , in which the base defines a dispensing orifice. 
     
     
         60 . The base as claimed in  claim 53 , in which base includes an annular sealing plug which depends from the underside of the top plate radially inwardly of the sidewall. 
     
     
         61 . A base for providing at least part of a container closure, the closure including a sidewall having a free end, the free end of the sidewall comprising a mobile retention flap joined thereto by a hinge line and being movable from a first, unfolded position to a second, folded position in which it is engageable with a container neck retention projection to prevent removal of the closure. 
     
     
         62 . The base as claimed in  claim 61 , further comprising a lid. 
     
     
         63 . The base as claimed in  claim 62 , in which the lid is connected to the base by a hinge. 
     
     
         64 . The base as claimed in  claim 63 , in which the lid is larger, in plan, than the base. 
     
     
         65 . A non-removable base for providing at least part of a container closure, the base comprising a sidewall having a foldable retention flap, and a container neck comprising a generally cylindrical neck finish with a retention bead formed on its exterior surface, the retention flap being movable from an unfolded position in which the closure is applied to the neck finish to a folded position in which the flap engages the retention projection to prevent removal of the closure. 
     
     
         66 . The base and neck of  claim 65 , in which the neck finish retention bead comprises an inclined face and a retention face.