Abstract A bottle cap is made of flexible, synthetic resin such as polyethelene having a disc-shaped top wall and a short cylindrical sidewall, a circular flap being integrally formed on the inner surface of said cylindrical sidewall, said flap being tapered downwardly to have a free end, the diameter of which is smaller than that of the upper end. A metal layer is formed over the top disc and cylindrical side faces, and crimps on said metal layer produced in molding are embedded in said synthetic resin disc wall and cylindrical sidewall. When the inside of the cylindrical wall engages the outside of the bottle mouth, said circular flap turns up on the top edge of the bottle mouth whereby such turned up portion sealingly fills the groove provided around the bottle mouth. The metal layer has a smooth surface and is bonded securely to the synthetic resin material.
A bottle cap for sealing a bottle having an annular grove adjacent its open end, the bottle cap being integrally molded of flexible synthetic resin and comprising a top wall, a cylindrical side wall and a circular imperforate sealing flap depending in a taper from the inside of said cylindrical sidewall so that the diameter of the upper end of said circular flap is larger than that of its lower free end, the flap being positioned on the sidewall so as to flex upward and seat resiliently in the annular groove of a bottle when pressed downward over the open end of the bottle.
Claim 2
Dependent Claim
104 words
A bottle cap for sealing a bottle having an annular grove adjacent its open end, the bottle cap being integrally molded of flexible synthetic resin and comprising a top wall, a cylindrical side wall and a circular imperforate sealing flap depending in a taper from the inside of said cylindrical sidewall so that the diameter of the upper end of said circular flap is larger than that of its lower free end, the flap being positioned on the sidewall so as to flex upward and seat resiliently in the annular groove of a bottle when pressed downward over the open end of the bottle.
Claim 3
Dependent Claim
19 words
The bottle cap of claim 1, wherein said circular flap is provided with annular ridges on its outer surface.
Claim 4
Dependent Claim
23 words
The bottle cap of claim 1, wherein a tongue-shaped tap is provided at a portion of the lower edge of said cylindrical sidewall.
Claim 5
Dependent Claim
38 words
The bottle cap of claim 1 wherein a metal sheet is bonded to the outer face of said top wall and cylindrical sidewall so that crimps produced on said sheet metal in molding are embedded in the resin.
Claim 6
Dependent Claim
38 words
The bottle cap of claim 1 wherein a metal sheet is bonded to the inner face of said top wall and cylindrical sidewall so that crimps produced on said metal sheet in molding are embedded in the resin.