초록 ▼

A rupturable stopper for a pouring spout for a receptacle includes a base having a pouring zone sealed closed by a cover connected to the base by frangible connection. The spout includes a tubular neck having internal screw threads connected to the base so as to surround the frangible connection and

A rupturable stopper for a pouring spout for a receptacle includes a base having a pouring zone sealed closed by a cover connected to the base by frangible connection. The spout includes a tubular neck having internal screw threads connected to the base so as to surround the frangible connection and terminating at a pouring lip. A cylindrical appendage extending up from the cover lies concentrically within the neck and receives a closure cap thereon that includes screw threads engageable with the neck and a seal that engages a spout pouring lip when the cap is engaged with the spout neck. Interlocking elements between the cap and the appendage prevent reverse rotation of the cap relative to the appendage so that, once the cap is secured in place within the neck by the screw threads, the first attempt to remove the cap drives the appendage in a twisting and axial movement to cause rupture of the frangible connection to open the pouring zone of the base. Reapplication of the cap in the neck reseals the pouring zone with the original cover and also seals the spout along the lip area of the neck.

대표청구항 ▼

A rupturable stopper for a pouring spout comprising a base having a pouring zone sealed closed by a cover connected to the base by a frangible connection; a tubular neck having an end connected to the base so as to surround the frangible connection and terminating at its other end at a pouring lip,

A rupturable stopper for a pouring spout comprising a base having a pouring zone sealed closed by a cover connected to the base by a frangible connection; a tubular neck having an end connected to the base so as to surround the frangible connection and terminating at its other end at a pouring lip, said neck and lip constituting a pouring spout, and said neck including internal screw threads; a cylindrical appendage connected to and extending coaxially within the tube towards the pouring lip; a closure cap including a tubular connecting portion having external screw-threads and a cylindrical bore; said screw cap secured to said neck by threading the screw threads of the connecting portion into the screw threads of the neck with said bore concentrically overlying said appendage; said cap including a seal portion engageable with said pouring lip when said connecting portion is threadedly secured to said neck; said cap and said appendage including cooperating locking elements that are engageable upon engagement of the connecting portion external threads to the neck internal threads by relative rotational movement in a screw thread advancing direction, said locking elements being configured to prevent reverse relative rotation between the cap and appendage in a screw unthreading direction.