Multiple-layered article and method of making same

Details Multiple-layered article and method of making same Multiple-layered article and method of making same

1989-01-13

1990-04-17

Zimmerman, John J.

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

428670, 428672, 428673, 428935, B32B 1500

Patent

active

049179675

ABSTRACT:
A multiple-layered metallic article useful for example, as costume jewelry having an intermediate "brightening layer" of bronze. A barrier layer selected from the group comprising palladium, tin, tin/zinc, rhodium, or platinum is disposed between the bronze "brightening layer" and a "top coat" layer to avoid migration of the copper component in the bronze layer to the outer surface of the article which, if left unimpeded eventually would result in a tarnishing effect to the article. As a result of the bronze intermediate layer, the article is hypo-allergenic with respect to those people having a skin sensitivity to nickel-plated or nickel-underplated metallic articles.

REFERENCES:
patent: 1001669 (1911-08-01), Monnot
patent: 2608753 (1952-09-01), Mooradian
patent: 2646616 (1953-07-01), Davignon
patent: 3162512 (1964-12-01), Robinson
patent: 3607150 (1971-09-01), McGinn
patent: 3778238 (1973-12-01), Tyler
patent: 3953246 (1976-04-01), Wilson et al.
patent: 4579761 (1986-04-01), Ruscoe et al.

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