Plastic cap and container
US-8431201-B2Abstract
The invention concerns a plastic cap ( 1 ) and a container ( 4 ) using same. The plastic cap ( 1 ) comprises an oxygen-tight liner ( 8 ) to be joined to an opening end surface ( 6 ) of a spout ( 5 ) on the container ( 4 ). The cap ( 1 ) has a circumferential skirt ( 2 ) with an internal annular bead ( 3 ) adapted for snap connection with a corresponding annular groove ( 7 ) in the spout ( 5 ). The liner ( 8 ) has on the side facing the cap ( 1 ) a first plastic layer ( 81 ), which is arranged to be permanently joined, when injection-molding the cap ( 1 ), to the plastic material of the cap ( 1 ), and on the side facing the container ( 4 ) a second plastic layer ( 82 ), which is arranged to be temporarily hermetically sealed to said opening end surface ( 6 ). On the end facing the container ( 4 ), the skirt ( 2 ) has a radial projection ( 10 ) which serves as a thumb grip and which when opening the container ( 4 ) allows the cap ( 1 ) to be bent away from said opening end surface ( 6 ) so that the temporary, hermetic seal between the second plastic layer ( 82 ) of the liner ( 8 ) and the opening end surface ( 6 ) of the spout ( 5 ) is gradually broken. The liner ( 8 ) comprises an intermediate layer ( 83 ) which is made of metal material enabling induction welding of the cap ( 1 ) to the opening end surface ( 6 ) of the container ( 4 ).
Patent figures（6）
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