Tamper indicating closure having a rotary seal

A threaded tamper indicating closure for use on a container having a threaded neck and stop means below its threads, said closure comprising:

• a cap having a top and an annular skirt depending from said top with internal threads complementary to said container threads;
• a tamper indicating band spaced from the bottom of said cylindrical skirt and connected thereto by a plurality of circumferentially spaced axially extending frangible webs;
• a fitment having an annular inner skirt which engages the interior of said container neck and an outer skirt concentric with and circumposing said annular inner skirt, said outer skirt having an inwardly directed bead which snaps on said container neck;
• engagement means on said band which permits rotation of said band with said cap as said cap is being threaded onto said container by allowing said engagement means to pass over said container stop means to the point where said closure is fully threaded onto said container neck where said engagement means is spaced from said container stop means, said engagement means contacting said stop means as said cap is being unthreaded, and said webs are stretched to their fracture point by retention of said engagement means by said container stop means;
• and
• a plug on said cap which maintains sealing contact with the annular inner fitment skirt and an inwardly directed bead on said cap skirt which maintains sealing contact with the exterior surface of the outer surface of said fitment outer skirt, both of said sealing contacts being maintained from the fully threaded position of said cap on said container neck until after said cap has been unthreaded to the point where said webs fracture.