Container construction

Claim 1

IN CONTAINER CONSTRUCTION OF THE TYPE IN WHICH A CONTAINER HAVING BOTTOM AND SIDE WALLS IS PROVIDED WITH FLANGE MEANS PROJECTING CONTINUOUSLY OUTWARDLY OF THE SIDE WALLS AT THE UPPER OPEN END OF THE SIDE WALLS, IN WHICH SAID PROJECTING FLANGE MEANS HAS A CONTINUOUS UPPER SEALING SURFACE AND A CONTINUOUS SHOULDER SPACED BELOW SAID UPPER SEALING SURFACE, IN WHICH AN ALUMINUM METAL CLOSURE IS PROVIDED FOR THE CONTAINER HAVING A CENTRAL CLOSURE WALL TERMINATING AT ITS EXTEMITIES IN CONTINUOUS OUTTURNED AND THEN DOWNTURNED-INTURNED FLANGE PORTIONS, IN WHICH THE DOWNTURNED-INTURNED CLOSURE FLANGE PORTIONS CONTINUOUSLY ENGAGES THE CONTAINER FLANGE MEANS SHOULDER TO HOLD THE CLOSURE SEALED IN A NORMAL SEALED POSITION TO THE CONTAINER WITH THE OUTTURNED CLOSURE FLANGE PORTION SEALED AGAINST THE CONTAINER CONTINUOUS UPPER SEALING SURFACE; THE IMPROVEMENT WHICH COMPRISES THE DOWNTURNED-INTURNED CLOSURE FLANGE PORTION TERMINATING INWARDLY BENEATH THE CONTAINER CONTINUOUS SHOULDER IN A CONTINUOUS GENERALLY INWARDLY EXTENDING FREE EDGE, A PERMANENT FINGER PULL TAB FORMED CONNECTED TO THE DOWNTURNED-INTURNED CLOSURE FLANGE PORTION AND EXTENDING FROM THE CONTINUOUS FREE EDGE OF SAID DOWNTURNED-INTURNED CLOSURE FLANGE PORTION, THE PERIPHERAL DIMENSIONS OF THE CONTINUOUS FREE EDGE F THE DOWNTURNED-INTURNED CLOSURE FLANGE PORTION BEING LESS THAN THE MAXIMUM PERIPHERAL DIMENSIONS OF THE CONTAINER PROJECTING FLANGE MEANS NORMALLY HOLDING THE CLOSURE SEALED TO THE CONTAINER IN SAID NORMAL SEALED POSITION, THE CLOSURE BEING FORMED OF AN ALUMINUM METAL CHARACTERIZED BY HAVING A COMBINED METAL TEMPER AND GAUGE PROVIDING THE DOWNTURNED-INTURNED CLOSURE FLANGE PORTION WITH THE RESILIENT QUALITIES TO DEFORM SLIGHTLY OUTWARDLY AND SPRING ADDITIONALLY OUTWARDLY UPON AN UPWARD HAND FORCE SOLELY ON THE FINGER PULL TAB TO PASS UPWARDLY OVER THE CONTAINER FLANGE MEANS FROM THE NORMAL SEALED POSITION OF THE CLOSURE ON THE CONTAINER TO A POSITION IN WHICH THE CLOSURE IS REMOVED FROM THE CONTAINER AND TO THEN SPRING BACK INWARDLY TO A POSITION IN WHICH THE CONTINUOUS FREE EDGE OF THE DOWNTURNED-INTURNED CLOSURE FLANGE PORTION HAS A PERIPHERAL DIMENSION LESS THAN THE MAXIMUM PERIPHERAL DIMENSION OF THE CONTAINER PROJECTING FLANGE MEANS, AND THE COMBINED ALUMINUM METAL TEMPER AND GAUGE PROVIDING THE DOWNTURNED-INTURNED CLOSURE FLANGE PORTION WITH THE RESILIENT QUALITIES TO SPRING OUTWARDLY SUFFICIENTLY FOR THE CONTINUOUS FREE EDGE OF SAID DOWNTURNED-INTURNED CLOSURE FLANGE PORTION TO PASS DOWNWARDLY OVER THE CONTAINER FLANGE MEANS AND THEN AUTOMATICALLY SPRING INWARDLY TO RE-ENGAGE WITH THE CONTAINER FLANGE MEANS SHOULDER IN AT LEAST A SEMI-SEALED POSITION UPON THE CLOSURE BEING REPOSITIONED OVER THE CONTAINER UPPER OPEN END AND SOLELY A DOWNWARD HADN FORCE BEING APPLIED TO SAID CLOSURE.