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US 6,006,415 AGranted
Techniques for transferring holograms into metal surfaces
AssigneeAluminum Company of America
InventorsMark W. Schaefer, Thomas L. Levendusky, Simon Sheu, Robert B. Larsen, Neville C. Whittle
Life of this patent
Estimating the term…
Abstract
A method for impressing holographic images or holograms in the surface of metal objects such as aluminum cans. The surfaces of metal shims and print rolls bearing holograms are hardened as by coating them with thin amorphous diamond coatings or diamond like coatings so the holograms can be embossed into many thousands of metal objects with clarity and consistency.
Claims12
A method of applying a holographic image to the surface of an article made of hard temper metal comprising:
- providing a die having a holographic image on a surface of the die, said die having a surface hardness of at least about 200-600 kg/mm.sup.2,
- providing a metal article to be impressed with said holographic image, said article having a surface hardness in a range of about 50-150 kg/mm.sup.2, and
- pressing said die against a surface on said metal article with a force in a range of about 2500-4800 pounds per square inch of a contact between said die and said article to transfer said holographic image into a surface on said metal article.
Dependencies are inferred from the claim text.