Closures

Claim 1

A CLOSURE FOR BOTTLES OF THE TYPE HAVING A NECK WITH AN EXTERNAL ROUNDED RIB SURROUNDING THE MOUTH OF THE BOTTLE, SAID CLOSURE BEING A THIN METAL SHELL COMPRISING A TOP AND A SKIRT, AT LEAST THE LOWERMOST PART OF SAID SKIRT BEING OUTWARDLY FLARED, SAID SKIRT TERMINATING IN AN INWARDLY CURLED SPIRAL BEAD HAVING AT LEAST ONE SPIRE CURVING DOWNWARDLY AND INWARDLY AND THEN UPWARDLY AND OUTWARDLY FROM THE LOWER DEGE OF SAID SKIRT, THE INNER DIAMETER OF SAID CURLED BEAD BEING BETWEEN A DIAMETER LESS THAN THE MAXIMUM SPECIFIED EXTERNAL DIAMETER OF THE RIB OF THE BOTTLE AND A DIAMETER ONLY SLIGHTLY IN EXCESS OF THE DIAMETER OF THE UPPER END OF THE CLOSURE SHELL SKIRT AND THE CURVED SURFACE AT SAID MINIMUM DIAMETER BEING ADAPTED TO ABUT AGAINST THE UNDERSIDE OF THE RIB ON THE NECK OF THE BOTTLE, A SHARP BEND IN THE METAL SHELL BEING FORMED AT THE JUNCTION BETWEEN SAID SKIRT AND SAID CURLED BEAD, SAID SHARP BEND FORMING A LINE OF DEMARCATION BETWEEN SAID CURLED BEAD AND SAID SKIRT AND BEING OF SUCH SHARPNESS THAT METAL CANNOT FLOW FROM SAID SKIRT TO SAID BEAD AND VICE-VERSA AROUND SAID SHARP BEND, AND SAID CLOSURE INCLUDING AN ANNULAR GASKET PLACED IN SAID SHELL IN CONTACT WITH SAID SKIRT ABOVE SAID INWARDLY CURLED BEAD, WHEREBY WHEN SAID CLOSURE IS PLACED ON THE NECK OF THE BOTTLE AND PRESSED DOWN ONTO THE NECK AND SAID SKIRT IS FORCED INWARDLY TOWARD THE NECK OF SAID BOTTLE, THE INSIDE ANGLE OF SAID SHARP BEND IS INCREASED AND SAID BEAD IS PRESSED TIGHTLY AGAINST THE UNDERSIDE OF SAID RIB.