Tab for easy-open ecology end

Abstract

When the improved tab is lifted by its lifting end, its opening end ruptures a scored line defining a panel, and this opens the container. The tab is retained to the container by a flap extending from the opening end toward the lifting end and including an affixing portion which is riveted to the container. After the container has been opened, the lifting end of the tab is depressed toward the end of the container. In prior art tabs, flexing of the flap occurred at a first bending region adjacent the affixing portion during both the lifting and depressing motions. In contrast, in the present invention the flap is shaped to provide a second bending region adjacent the openind end, in addition to the first bending region adjacent the affixing portion. When the lifting end is lifted, the improved tab flexes in the first bending region, and when the lifting end is depressed, the improved tab flexes in the second bending region. In this manner the flexing is shared between the first and the second bending regions.

What is claimed is: 
     
       1. A tab of the type affixed to a can end for opening it and comprising: a unitary structure including   a lifting end;   an opening end opposite said lifting end and spaced from it;   spaced leg members connecting said lifting end and said opening end; and,   a flap extending longitudinally from said opening end toward said lifting end between said spaced leg members, spaced from said spaced leg members and from said lifing end, including an affixing portion by which said flap is affixed to the can end, said affixing portion spaced from said opening end, the width of said flap varying along the length of said flap to define a first bending region extending laterally across said flap adjacent said affixing portion and a second bending region extending laterally across said flap adjacent said opening end, the width of said flap in said second bending region being sufficiently small relative to the width of said flap in said first bending region that after said lifting end has been pulled away from the can, thereby flexing said flap in said first bending region, when said lifting end is subsequently pushed toward the can end, said flap flexes in said second bending region, whereby no part of said flap is flexed more than once as said lifting end is pulled away from the can and then pushed back towards its original position adjacent the can end.   
     
     
       2. In a unitary tab of the type affixed to a can end for opening it and having a lifting end opposite an opening end, and having spaced leg members connecting the opposite ends, the improvement comprising: a flap extending from the opening end toward the lifting end between the spaced leg members, spaced from the spaced leg members and from the lifting end, and including an affixing portion by which said flap is affixed to the can end, said affixing portion spaced from the opening end, the width of said flap increasing along the length of said flap between the opening end and said affixing portion so that flexing of said flap is distributed along the length of said flap between the opening end and said affixing portion when the lifting end of the tab is first lifted away from the can end and then pushed back towards it, whereby repeated localized flexing is substantially avoided.   
     
     
       3. The improvement of claim 2 wherein said flap is generally tapered in width between the opening end and said affixing portion. 
     
     
       4. The improvement of claim 2 wherein said flap is sufficiently narrow adjacent the opening end that after the lifting end has been pulled away from the can end thereby bending said flap in a first bending region of it located adjacent said affixing region, when the lifting end is subsequently pushed toward the can end said flap bends in a second bending region of it located adjacent the opening end. .Iadd. 
     
     
       5.  A tab for easy opening containers comprising a tab body having means at one end particularly adapted for applying an inwardly directed rupturing pressure on the container panel when the opposite end is moved outwardly, said tab having a bendable mounting ear positioned intermediate its ends for connection to the end panel, and means providing a plurality of hinge axes on said ear for accommodating shifting the bend of the ear from one axis to another attendant to back and forth bending movements of said tab and thus impeding fracture of the ear and thereby removal of the tab from the container. .Iaddend. .Iadd.6. The invention according to claim 1 and said one end of the tab comprising a nose portion having a non-work hardened section and at least one of said hinge axes being located in said section. .Iaddend. .Iadd.7. The invention according to claim 2 and said mounting ear having a narrower than elsewhere width portion adjacent to said non-work hardened section. .Iaddend. .Iadd.8. The invention according to claim 1 and said ear having side edges with at least one notch in each 
     
     
        edge defining at least one of said hinge axes. .Iaddend. .Iadd.9.  The invention according to claim 5 and said notches each defined by an inner edge and said inner edges converging toward said one end of the tab. .Iaddend. .Iadd.10. The invention according to claim 1 and said means comprising a portion at the forward end of the tab each sloping upwardly toward said one end of the ear and adapted to ear during hinging movement between the tab and ear. .Iaddend. .Iadd.11. The invention according to claim 1 and said tab being made of thin one piece sheet metal. .Iaddend. .Iadd.12. The invention according to claim 1 and said tab being aluminum. .Iaddend. .Iadd.13. An easy opening container end with nondetachable means for making an opening therethrough suitable for pouring comprising: A tab having work hardened means at one end for rupturing said end and a nonwork hardened section and having a lift portion at the other end for lifting the tab and pressing said one end against said container end, and attaching means on the container end and said tab for securing the tab to said container end and comprising a securing lug on the tab, and at least one selected hinging axis of connection between the said lug and tab in a   
     
     
        nonwork hardened section of the tab at said one end. .Iaddend. .Iadd.14. The invention according to claim 11 and said tab having a central depressed body section and said lug being cut from said body section. .Iaddend.