Pull-tab liner

Abstract

A closure package includes a closure cap and a liner having a pull-tab. The liner is configured for use with a container having a finish or lip portion having a sealing surface at an uppermost portion thereof. The closure cap has a top wall portion and a depending skirt portion depending from the top wall portion. The top wall portion and sealing liner is adapted to coact with the container sealing surface to form a seal therebetween. The liner of the subject invention is for use with a closure package and is disposed in cap, positioned intermediate the top wall portion and the container sealing surface when the cap is positioned on the container. The liner is circular and has a central portion and a tab portion integral with the central portion, extending outwardly from a periphery thereof. The tab is folded on or above a tangent to the periphery of the liner, over the central portion into a folded position, and defines a hinge region at the juncture of the tab and above the tangential line to the liner circumference.

1 . A liner for use with a cap and container assembly, said liner comprising:
 a central disc portion having a circumference;   a pull-tab on a periphery of said central disc portion;   said pull-tab having a hinge area parallel with a line tangential to the circumference or radially outside the circumference;   said pull-tab being capable of being folded on said hinge area to lay flat over said central disc portion, whereby in use in the cap said folded pull-tab biases said central disc portion against a wall of said cap.   
     
     
         2 . The liner of  claim 1  further including at least one tab on said periphery of said central disc portion in addition to said pull-tab. 
     
     
         3 . The liner of  claim 2  wherein said at least one tab is in proximity to said pull-tab. 
     
     
         4 . The liner of  claim 1  wherein said folded pull-tab has wings on opposing sides of said pull-tab. 
     
     
         5 . The liner of  claim 1  further including a plurality of tabs on said periphery of said central disc portion. 
     
     
         6 . The liner of  claim 5  wherein one of said plurality of tabs is in proximity to said pull-tab. 
     
     
         7 . The liner of  claim 2  wherein the pull-tab is larger than said at least one tab. 
     
     
         8 . A liner having a pull-tab for use with a cap and container assembly, said liner comprising:
 a central disc portion having a circumference;   a plurality of tabs comprising first tabs and a pull-tab,   said pull-tab being larger than the first tabs,   at least one of the first tabs being in proximity to said pull-tab,   said pull-tab having a hinge area parallel to a tangential line to said circumference and touching or radially beyond the circumference,   whereby said pull-tab is folded along said hinge area to be substantially flat against the central disc portion and be capable of maintaining the liner within the cap when inserted therein.   
     
     
         9 . The liner of  claim 8  wherein the at least one of first tabs is within 30° of the pull-tab on the circumference. 
     
     
         10 . The liner of  claim 8  wherein said pull-tab is larger than each of said first tabs. 
     
     
         11 . A circular liner having a pull-tab for use with a cap and container assembly, said liner having a pull-tab;
 said pull-tab having a hinge area parallel with a line tangential to a circumference of the liner or outside the tangential liner; and   said pull-tab being folded on said hinge area for use in the cap, thereby forming retention areas on opposite sides of the pull-tab, whereby said retention areas and said folded pull-tab bias said liner against an opposing interior wall of the cap.   
     
     
         12 . The liner of  claim 11  further including at least one tab on said periphery of said central disc portion in addition to said pull-tab. 
     
     
         13 . The liner of  claim 11  wherein said at least one tab is in proximity to said pull-tab. 
     
     
         14 . The liner of  claim 11  wherein said retention areas comprise wings. 
     
     
         15 . The liner of  claim 11  further including a plurality of tabs on said periphery of said central disc portion. 
     
     
         16 . The liner of  claim 12  wherein said pull-tab is larger than said at least one tab.