Container cap having frangible sealing means

Claim 1

A CAP FOR A CONTAINER COMPRISING: (A) A BASE MEMBER HAVING (D) A COLLAR PORTION FOR CONNECTION WITH THE NECK OF A CONTAINER, (C) SAID COLLAR PORTION HAVING A CIRCULAR WALL FORMED INTERNALLY THEREOF AND (D) AN ANNULAR BEAD ON THE OUTER SURFACE THEREOF, (E) SAID CIRCULAR WALL HAVING AN OUTLET PASSAGE EXTENDING THERETHROUGH OFFSET FROM THE AXIS THEREOF, (F) A PLUG CONNECTTED TO THE UPPER SURFACE OF SAID CIRCULAR WALL AND SEALING OFF SAID OUTLET PASSAGE, (G) AN OVERCAP INCLUDING (H) A CIRCULAR TOP WALL HAVING (J) A COLLAR DEPENDING FROM THE UNDERSIDE THEREOF, (J) SAID COLLAR HAVING AN INTURNED FLANGE FOR GRIPPING ENGAGEMENT WITH SAID BEAD OF SAID BASE COLLAR PORTION THEREBY MOUNTING SAID OVERCAP AXIALLY ROTATABLE AND CAPTIVE ON SAID BASE, (K) SAID TOP WALL OF SAID OVERCAP HAVING A PROJECTION DEPENDING FROM THE UNDERSIDE THEREOF, (L) SAID PROJECTION AND TOP WALL HAVING AN OUTLET HOLE EXTENDING THERETHROUGH WHICH IS OFFSET FROM THE AXIS OF SAID OVERCAP AND SAID BASE, (M) SAID OUTLET HOLE AND SAID PASSAGE BEING EQUIDISTANT FROM THE AXIS OF SAID OVERCAP AND SAID BASE MEMBER, (N) THE INITIAL ROTATION OF SAID OVERCAP CAUSING SAID PROJECTION TO CONTACT SAID PLUG AND SEVER IT FROM SAID CIRCULAR WALL OF SAID BASE MEMBER THEREBY EXPOSING SAID OUTLET PASSAGE HOLE FOR ALIGNMENT WITH SAID OUTLET HOLE OF SAID OVERCAP BY FURTHER ROTATION OF SAID OVERCAP, SAID OUTLET PASSAGE HOLE BEING CLOSED BY ADDITIONAL ROTATION OF SAID OVERCAP WHEREBY SAID OUTLET HOLE IS OUT OF ALIGNMENT WITH SAID OUTLET PASSAGE.