Patent ID: 7314589

Claim:
A method for creating a seal gasket in the closure cap of a container starting from a cap formed separately, comprising: inserting into a cap ( 1 , 10 , 100 ) a first portion ( 3 , 30 , 300 ) of material in the plastic state having barrier properties against O 2 , CO 2 , or other gases; inserting a first die ( 4 , 40 , 400 ) to subject said first portion of material to compression in order to form on the base of the cap a first layer ( 5 , 50 , 500 ) of material having barrier properties against said gases wherein the first layer has a circular shape and a diameter smaller than the inside diameter of the cap, and a second layer having a circular shape and a diameter larger than the diameter of the first layer so as to cover completely the first layer and prevent liquid in the container from contacting the first layer; inserting into the cap onto said first layer a second portion ( 6 , 60 , 600 ) of material in the plastic state having hydraulic sealing properties; and inserting a second die ( 7 , 70 , 700 ) to subject said second portion of material to compression in order to seal said second layer onto said first layer having hydraulic sealing properties.