초록 ▼

A linerless closure for use in sealing plastic bottles and jars is disclosed. The linerless closure has a series of concentric annular sealing rings for sealing contact with a bottle mouth. A ridge located between an inner and outer sealing flange provides for a minimum of two sealing surfaces and a

A linerless closure for use in sealing plastic bottles and jars is disclosed. The linerless closure has a series of concentric annular sealing rings for sealing contact with a bottle mouth. A ridge located between an inner and outer sealing flange provides for a minimum of two sealing surfaces and a maximum of three sealing surfaces with a bottle mouth. A buttress flange spaced inwardly of the inner sealing flange provides additional strength to the inner sealing flange for guiding an irregular bottle mouth to a sealing engagement.

대표청구항 ▼

A threaded closure cap having a skirt portion surrounding an upper portion, said upper portion having an inner surface with a series of annular depending flanges concentric about a common central axis, said depending flanges including a generally flexible outer sealing flange, a generally flexible i

A threaded closure cap having a skirt portion surrounding an upper portion, said upper portion having an inner surface with a series of annular depending flanges concentric about a common central axis, said depending flanges including a generally flexible outer sealing flange, a generally flexible inner sealing flange and a generally inflexible buttress means, each of said sealing flanges having generally parallel side walls; a ridge located between said inner sealing flange and said outer sealing flange and spaced from each, said buttress means being an innermost flange and spaced from said inner sealing flange to create a channel therebetween while providing a means for conforming said ridge and an upper land surface of a bottle, each of said inner sealing flange and said outer sealing flange providing sealing surfaces upon contact with a bottle mouth wall, said ridge providing a sealing surface upon contact with an upper bottle mouth surface whereby one of said inner sealing flange and said outer sealing flange makes contact with a bottle mouth wall at all times, and said ridge makes a sealing contact with said upper bottle mouth surface at all times, said buttress means providing generally inflexible support to said inner sealing flange upon contact with an irregular bottle having an undersized mouth wall portion, whereby said inner sealing flange is conformed to said bottle mouth wall configuration.