초록 ▼

A plastic screw closure for bottles comprising a cap having a substantially cylindrical peripheral portion (1) with an internal screw thread (8) for screwing onto an external screw thread (11) of a bottle neck (10), and with a disc-like top plate portion (2). A substantially cylindrical sealing stri

A plastic screw closure for bottles comprising a cap having a substantially cylindrical peripheral portion (1) with an internal screw thread (8) for screwing onto an external screw thread (11) of a bottle neck (10), and with a disc-like top plate portion (2). A substantially cylindrical sealing strip (4) which extends axially from the inside of the top plate portion (2) has an outside diameter at least equal to the bottle neck's outside diameter (D) and an inside diameter (2r.sub.2) smaller than the bottle neck's outside diameter (D). Inside the cylindrical sealing strip (4), a further, substantially cylindrical sealing olive-shaped button (3) is radially fitted, the outside diameter (2R.sub.1) of which, at least in the area near the top plate and opposite the sealing strip (4), is larger than the inside diameter (d) of the bottle neck (10).

대표청구항 ▼

[ What is claimed is:] [1.]1. A plastic screw closure intended for sealing a bottle with a threaded bottle neck (10) having an outside diameter (D), an inside diameter (d), a thickness (1/2.vertline.D-d.vertline.) defined therebetween, an upper outer edge, and an inner surface, said screw closure, b

[ What is claimed is:] [1.]1. A plastic screw closure intended for sealing a bottle with a threaded bottle neck (10) having an outside diameter (D), an inside diameter (d), a thickness (1/2.vertline.D-d.vertline.) defined therebetween, an upper outer edge, and an inner surface, said screw closure, before being secured on the bottle neck to which said closure is to be applied, comprising:a top plate portion (2) which is substantially in the form of a circular disc;a substantially cylindrical peripheral portion (1) extending from said top plate portion, said peripheral portion having a screwthread (8) adapted to cooperate with the threaded bottle neck and a substantially cylindrical bead (5) adjacent said top plate portion;a substantially cylindrical deformable sealing strip (4) extending axially from said top plate portion (2) inward of said bead and having an inside diameter (2r2) which is smaller than the outside diameter (D) of the thread bottle neck; anda substantially cylindrical sealing olive (3) extending axially from said top plate portion (2) inward of said deformable sealing strip (4) and having, at least at a portion substantially opposite said deformable sealing strip, an outside diameter (2R1) greater than the inside diameter (d) of the threaded bottle neck (10),wherein when said closure is fitted onto the threaded bottle neck:said sealing olive is adapted to radially deform inwardly and seal at least substantially along the inner surface of the threaded bottle neck,said deformable sealing strip is adapted to radially deform outwardly at least as large as or greater than the radial inward deformation of said sealing olive and seal at least substantially along the upper outer edge of the threaded bottle neck, andsaid cylindrical bead is adapted to press said sealing strip against the threaded bottle neck.