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US 5,308,418 AGranted
Packing container for liquid, especially pressurized contents
AssigneeTetra Laval Holdings & Finance S.A.
InventorBengt Bjorck
Life of this patent
Estimating the term…
Abstract
A packing container is disclosed in which an end wall of the packing container has an opening formed therein for emptying the contents of the container. The opening in the end wall is covered by a cover strip which is detachably secured to the end wall. The cover strip and the end wall are formed of a plastic coated metallic material and the cover strip is secured to the end wall along a sealing joint that surrounds the opening. The cover strip is secured to the end wall by surface fusion.
Claims4
A method of forming an opening arrangement on a container, comprising the steps of:
- forming a container having an end wall located at one end thereof, said end wall including a metal layer, forming an opening in the end wall so that said opening is defined by an inner peripheral wall that extends between upper and lower surfaces of said end wall, applying a coating of weldable plastic material to the metal layer of the end wall so that the coating of weldable plastic material is in contact with the metal layer on at least one side of the metal layer and so that the coating of weldable plastic material covers substantially the entire inner peripheral wall of the opening;
- providing a cover strip formed of a metal layer and a coating of weldable plastic material in contact with the metal layer on at least one side of the metal layer;
- and
- sealing the cover strip to the end wall by sealing the coating of weldable plastic material of the cover strip directly to and in contact with the coating of weldable plastic material of the end wall, and cover strip being sealed to the end wall such that the cover strip covers the opening in the end wall.
1 more element
Dependencies are inferred from the claim text.