Container and closure with internal tamper indication

Claim 1

A tamper-evident closure assembly for a container having a finish opening comprising: a base member including means for securement to the bottle finish, means for forming a liquid-tight seal to the bottle finish, spout means for forming an upwardly extending spout having an outer surface and an internal bore through which contents of the container are discharged; a cap member including an end wall and an annular skirt depending from an outer periphery thereof, a cylindrical internal collar depending from the end wall and disposed within the annual skirt so as to be at least partially enclosed thereby, and said collar having an internal recess dimensioned to receive at least a portion of said spout therein, with the collar in direct contact with the outer surface of the spout to close the spout internal bore without protruding therein; hinge means for directly joining the cap to the base member with the cap hingedly mounted for movement between an open position remote from said spout and a closed position with said internal collar engaging said spout; said internal collar and said spout having releasable locking means which are separated upon opening of the cap and which maintain the cap endwall spaced from said spout means when the cap closes the spout; and a frangible seal integrally formed with the pour spout and joined thereto through a frangible ring, and pull tab means integrally formed with the frangible seal to facilitate rupture of the frangible ring, thereby allowing removal of the seal from the spout.