Crown-type sealing closure

Claim 1

A SEALING CLOSURE FOR A CROWN-TYPE BOTTLE HAVING A BEADED LIP WITH A PREDETERMINED RADIUS OF CURVATURE ADJACENT ITS MOUTH AND AN ANNULAR SHOULDER FACING OPPOSITELY FROM THE TOP OF SAID LIP, COMPRISING: A DUCTILE METAL CAP HAVING A CENTRAL CLOSURE PORTION WITH A DIAMETER SUBSTANTIALLY EQUAL TO THE MAXIMUM OUTSIDE DIAMETER OF SAID LIP AND A DEPENDING SKIRT ADAPTED FOR LOCKING ENGAGEMENT WITH SAID SHOULDER, THE RADIUS OF CURVATURE OF SAID CAP AT THE JUNCTION OF SAID CLOSURE AND SKIRT PORTIONS BEING LESS THAN THE RADIUS OF CURVATURE OF SAID LIP, SAID CLOSURE AND SKIRT PORTIONS BEING FORMED WITH FIRST AND SECOND CONTINUOUS PRESSURE RIDGES, RESPECTIVELY, IN THEIR LIP-ENGAGING SURFACES, SAID RIDGES DEFINING THE BOUNDARIES OF A CONTINUOUS CORNER GROOVE AT SAID JUNCTION THAT OPENS TO THE INTERIOR OF SAID CAP; AND A RESILIENT, DEFORMABLE SEALING RING SEATED IN SAID GROOVE AND HAVING A VOLUME INITIALLY LESS THAN THE VOID OF SAID GROOVE AND A FLAT LINER DISC CLOSING THE CENTRAL SPACE OF SAID RING, SAID FIRST AND SECOND RIDGES BEING ADAPTED TO BE PRESSURALLY ENGAGED WITH SAID LIP TO CONFINE SAID SEALING RING WITHIN SAID GROOVE, AND, THEREAFTER, SAID SECOND RIDGE BEING ADAPTED TO BE MOVED ALONG SAID LIP TO VOLUMETRICALLY SIZE SAID GROOVE AND SAID SEALING RING TO ONE ANOTHER AND DEFORM SAID SEALING RING AGAINST SAID LIP DURING SAID LOCKING ENGAGEMENT OF SAID SKIRT WITH SAID SHOULDER.