Tab-open closure cap for drinking cup-carton

Claim 1

A CLOSURE CAP FOR CUP-CARTONS COMPRISING A FLAT LAMINATED BLANK ADAPTED TO BE PRESSED ONTO THE TOP OF THE CUP-CARTON SUFFICIENTLY TIGHT TO FORM A LEAK PROOF CLOSURE FOR SAID CUP-CARTON, SAID BLANK CONSISTING OF THREE SEPARATE ELEMENTS, AS FOLLOWS: A BOTTOM ELEMENT CONSISTING OF A GENERALLY FLAT CIRCULAR DISC FROM WHICH TWO PORTIONS HAVE BEEN CUT AWAY, NAMELY A CIRCULAR PORTION CUT FROM AROUND THE CENTER OF THE CIRCLE AND ADAPTED TO FORM A FILLING OR SIPPING OPENING IN SAID DISC AND A SECTOR CUT FROM SAID DISC AND ADAPTED TO FORM A DISPENSING OPENING IN SAID DISC; AN INTERMEDIATE ELEMENT COMPRISING A LAMINATED SHEET OF A SIZE AND SHAPE SUCH THAT WHEN PLACED ON SAID DISC, THE SHEET COVERS THE TWO CUT AWAY PORTIONS OF SAID DISC AND INCLUDES ADDITIONAL MATERIAL ADAPTED TO EXTEND ALONG THE PERIMETER OF THE CUT AWAY PORTIONS OF SAID DISC, SAID SHEET INCLUDING A PULL TAB ADAPTED TO OVERLIE SAID FILLING OPENING AND A BIB ADAPTED TO EXTEND OUTWARD OF THE CURVED SIDE OF SAID CIRCULAR SECTOR, SO AS TO PROVIDE A PORTION TO BE GRIPPED WHEN IT IS DESIRED TO OPEN SAID CLOSURE BY SEPARATING THE ELEMENTS OF SAID BLANK FROM ONE ANOTHER TO EXPOSE THE CUTAWAY SECTOR IN SAID DISC AND ALSO AS A SANITARY PROTECTION FOR THE LIP OF THE CUP; AND A COVER PIECE COMPRISING A SECTOR SHAPED COVER, SLIGHTLY LARGER THAN THE SECTOR SHAPED PIECE CUT AWAY FROM THE BOTTOM ELEMENT; SAID THREE ELEMENTS BEING SECURED TOGETHER IN FACE TO FACE RELATIONSHIP WITH THE INTERMEDIATE ELEMENT DISPOSED BETWEEN SAID BOTTOM DISC AND SAID COVER PIECE AND WITH SAID COVER PIECE OVERLYING THE CUTAWAY PORTION OF SAID BOTTOM DISC.