초록 ▼

A threaded closure having both a tamper indicating and a non-backoff feature which locks the closure to a container to avoid unwanted loosening. The closure takes the form of a one piece cylindrical cap with an inwardly directed bead at its open end. The cap bead engages a complimentary bead on the

A threaded closure having both a tamper indicating and a non-backoff feature which locks the closure to a container to avoid unwanted loosening. The closure takes the form of a one piece cylindrical cap with an inwardly directed bead at its open end. The cap bead engages a complimentary bead on the neck of the container as the cap is screwed onto the container, and the cap bead snaps over the container bead to form a non-backoff seal. The cap has a tamper indicating band attached to its lower end by frangible webs. The band and container have complimentary stop means which coact to restrain movement of the band when the cap is unthreaded, fracturing the frangible webs giving an indication of tampering or initial opening.

대표청구항 ▼

A screw-type safety cap for use on a container having a threaded neck, and outwardly projecting bead below said thread and stop means below said bead, said cap comprising, in combination: a flat top; a first cylindrical skirt portion depending from said top having internal threads complimentary to s

A screw-type safety cap for use on a container having a threaded neck, and outwardly projecting bead below said thread and stop means below said bead, said cap comprising, in combination: a flat top; a first cylindrical skirt portion depending from said top having internal threads complimentary to said container threads; a second cylindrical skirt portion having a larger diameter than said first cylindrical skirt portion and depending therefrom with an inwardly projected bead at its free end; a tamper indicating band spaced from the bottom of said second cylindrical skirt portion and connected thereto by a plurality of circumferentially spaced axially extending frangible webs, said band having stop means cooperating with the stop means on said container; whereby as said cap is assembled to a container, said band and container stop means contact each other without fracture of said webs snapping said skirt bead over said container bead; and when said cap is unthreaded from said container, said band and container stop means cooperate to resist relative movement therebetween causing fracture of said frangible webs leaving said tamper indicating band on said container after said cap has been removed.