Sealing disc with flexible annular ring

Abstract

A closure for a container consists of a top wall with an annular skirt depending therefrom and extending downwardly to a terminating edge. An inner surface of the annular skirt has a retaining bead in an upper portion of the inner wall. If threads are to used on a finished closure, then such threads, as desired, replace the retaining bead. Additionally, the top wall has a flexible annular ring formed axially along an inner surface and depending downwardly therefrom and spaced inwardly of the skirt. A sealing disc is disposed above the retaining bead and below the flexible annular ring. The flexible annular ring has a diameter larger than the inner diameter of the retaining bead. Furthermore, the flexible annular ring is the same diameter as a container rim of a container to be sealed by the closure of the present invention. Another preferred closure substitutes a glue post mounted along an inner surface of the top wall for the retaining bead in order to attach the sealing disc to the inside of the closure.

What is claimed is:  
     
         1 . A closure for a container comprising: 
 a top wall with an annular skirt depending therefrom and extending downwardly to a terminating edge;    an inner surface of said annular skirt having a retaining mechanism;    said top wall having a flexible annular ring formed along an inner surface and depending downwardly therefrom, said flexible annular ring spaced inwardly of said skirt;    a sealing disc disposed above said retaining mechanism and below said flexible annular ring.    
     
     
         2 . The closure for a container of  claim 1 , said retaining mechanism being a retaining bead.  
     
     
         3 . The closure for a container of  claim 1 , said retaining mechanism being an upper surface of at least one thread formed on an upper portion of said inner wall.  
     
     
         4 . The closure for a container of  claim 3 , said thread including at least one helical thread.  
     
     
         5 . The closure for a container of  claim 1 , said flexible annular ring compressively contacting an upper surface of a container neck.  
     
     
         6 . The closure of  claim 1  wherein said sealing disc has a diameter which is larger than an inner diameter of said retaining mechanism.  
     
     
         7 . The closure of  claim 1  further comprising a central post extending downward from said top wall, said sealing disc having an aperture formed centrally there through, said central post extending through said aperture.  
     
     
         8 . The closure of  claim 7  wherein said retention mechanism further comprises an outwardly extending bead extending from said central post and contacting a lower interior surface of said sealing disc.  
     
     
         9 . A closure for a container comprising: 
 a top wall with an annular skirt depending therefrom and extending downwardly to a terminating edge, said top wall having an inner surface;    an inner surface of said annular skirt having a retaining mechanism;    a compressible annular ring formed on said top wall inner surface and depending downwardly therefrom, said compressible annular ring spaced inwardly of said skirt;    a downwardly extending central post formed on said top wall inner surface interior from said compressible annular ring;    a sealing disc disposed above said retaining mechanism and below said flexible annular ring and having an aperture formed therethrough;    said post extending through said aperture in said sealing disc.    
     
     
         10 . A closure for a container, said closure consisting of: 
 a top wall with an annular skirt depending therefrom and extending downwardly to a terminating edge;    said top wall having a flexible annular ring formed along an inner surface and depending downwardly therefrom;    said top wall of said closure having a post located on an inner surface of said top wall, said post depending downwardly therefrom, and located inboard of said flexible annular ring;    a sealing disc attached to said post and below said flexible annular ring;    said sealing disc having a diameter larger than said flexible annular ring.    
     
     
         11 . The closure for a container of  claim 10 , said flexible annular ring having a diameter equal to a diameter of a container rim of a container to be sealed by said closure.