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US 6,301,767 B1Granted
Cap with plastic sleeve
AssigneePechiney Emballage Alimentaire
InventorsJacques Granger, Richard Poyol
Life of this patent
Estimating the term…
Abstract
An overcap for a container including a head portion and a skirt portion, and a method for its production. The skirt portion has a metal wall and an opening area constructed and arranged to be broken during removal of the overcap. A sleeve of plastic material adheres to the metal wall over an area limited to the opening area.
Claims13
Method for manufacturing an overcap, comprising the steps of:
- a) forming a blank of said overcap from a metal layer and shaping said blank into a head portion and a skirt portion comprising an opening area constructed and arranged to be broken during removal of the overcap;
- b) placing a sleeve made of a plastic film on a mandrel;
- c) placing said blank on said sleeve on the mandrel;
- d) using a heated die to exert pressure and transfer heat from the die to the blank and to the sleeve, at a temperature and for a time sufficient to cause adherence of the sleeve and blank without melting of the sleeve at a sleeve-mandrel interface, said sleeve being adhered to said shaped blank over an area limited to said opening area;
- and
- e) optionally further shaping the blank by forming means for facilitating an initial opening.
3 more elements
Dependencies are inferred from the claim text.