Laminated composite coins and method thereof

Details Laminated composite coins and method thereof Laminated composite coins and method thereof

1989-05-19

1990-11-27

Yee, Deborah

Stock material or miscellaneous articles

All metal or with adjacent metals

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

72359, 40 275, B32B 1500

Patent

active

049735241

ABSTRACT:
For use in the making of coins a laminated composite is proposed which can be used to substitute coins made of nickel and consists of a combination of a ferritic chromium steel and an austenitic nickel-chromium steel. In dependence of the nature of the existing system used to discriminate the nickel coins to be substituted, a laminated composite may be used which has a core layer consisting of the ferritic chromium steel and provided on both sides with a cladding having a thickness of 2 to 10% of the total thickness and consisting of the austenitic nickel-chromium steel, or a laminated composite which comprises a core layer consisting of the austenitic nickel-chromium steel and provided on both sides with a cladding having a thickness of 20 to 40% of the total thickness and consisting of the ferritic chromium steel. An optimum approxmation of the acceptability ranges adjusted for nickel in the discriminating systems can be achieved by a proper selection of the ratios of the thicknesses of the layers.

REFERENCES:
patent: 3694271 (1972-09-01), Egnell
patent: 4705727 (1987-11-01), Hunter

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