Abstract: A stopper device for a bottle having a neck provided with an outside bead at its free end and intended for use with a water fountain type liquid dispenser comprises a plastics material capsule having an end wall from which project in the same direction a substantially cylindrical outer skirt which has an inside bead which hooks behind the outside bead on the neck of the bottle and a substantially cylindrical inner chimney to receive a dispenser tube on the dispenser which nests in the chimney from the side of the end wall of the capsule when the bottle is fitted to the dispenser. The capsule further comprises a tamperproofing closure which closes off the chimney so that it is irrevocably and visibly destroyed upon nesting of the dispenser tube in the chimney and can comprise a diaphragm made up of a plurality of petals connected together by tear lines.

Abstract: 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.

Abstract: A tamper-indicating screw-on closure cap for receptacles having threaded necks includes a tamper-indicating security band in the form of a ring including a stop strip turned inwardly of the ring and inclined in an inward and upward direction so that, upon first assembly of the cap to a receptacle neck the stop strip engages beneath a peripheral projection on the neck. The stop strip includes a continuous upper edge lying in an imaginary stop plane extending perpendicular to the axial direction of the cap and spaced zones of lesser thickness that define a plurality of sectors that also include an inwardly projecting chordwise rib terminating at an inner edge that subtends each respective sector, wherein the edges of the ribs together define a polygonal section of passage the inscribed circle of which presents a diameter smaller than that of the peripheral projection of the neck.