| 摘要 |
A method for creating a seal gasket in the closure cap of a container starting from a cap formed separately, characterised by comprising the following operations: inserting into a cap ( 1, 10, 100 ) a first portion ( 3, 30, 300 ) of material in the plastic state having barrier properties against O<SUB>2</SUB>, CO<SUB>2</SUB>, 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; 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 form on said first layer a second layer ( 8, 80, 800 ) with hydraulic sealing properties.
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