초록 ▼

A novel closure-making process and apparatus are disclosed for formation of plastic closures. The closures include a plastic closure cap which is compression molded to provide a closure having the requisite strength. The process includes steps for formation of a sealing liner within the closure cap

A novel closure-making process and apparatus are disclosed for formation of plastic closures. The closures include a plastic closure cap which is compression molded to provide a closure having the requisite strength. The process includes steps for formation of a sealing liner within the closure cap if desired, with formation of a novel liner-retaining arrangement provided for secure retention of the liner within the cap. The process also includes steps for formation of a tamper-indicating pilfer band integrally with the plastic cap of the closure for formation of closures requiring a suitable tamper-indicating device.

대표청구항 ▼

A process for making a composite closure for a container, comprising the steps of: forming a plastic cap having a top wall portion, an internally threaded annular skirt portion, and an inwardly extending, annular liner-retaining lip; depositing a quantity of moldable plastic in said cap; and forming

A process for making a composite closure for a container, comprising the steps of: forming a plastic cap having a top wall portion, an internally threaded annular skirt portion, and an inwardly extending, annular liner-retaining lip; depositing a quantity of moldable plastic in said cap; and forming a liner including a generally inwardly facing sealing surface with said moldable plastic so that said moldable plastic flow against said lip and said lip retains said liner within said cap.