Bottle closure for champagne bottles and the like having threaded mouths

Abstract From the Canadian patent

The invention relates to a bottle closure which is suitable, in particular, for champagne bottles having threaded mouths. This bottle closure is unitary made and is of plastic and has a stopper like sealing shank with a, smooth exterior, which penetrates into the neck of the bottle. A cap comprising an internal thread which is adapted to the external thread of the bottle is provided around the sealing shank. The latter projects somewhat beyond the thread of the cap so that, when the bottle closure is opened a, "plop" which is a typical noise of a champagne bottle is, produced. The bottle itself has a bead which when the bottle, closure is in place, is covered by the lower end of the cap. …