Coins coated with nickel, copper and nickel

Details Coins coated with nickel, copper and nickel Coins coated with nickel, copper and nickel

1991-06-28

1992-08-18

Lewis, Michael

Stock material or miscellaneous articles

All metal or with adjacent metals

Intermediate article

428675, 428679, 40 275, B32B 1500

Patent

active

051398869

ABSTRACT:
This invention overcomes problems such as pinholes and blisters in making plated coin blanks and similar articles. A ferrous metal blank is electroplated with a strike of nickel, following which a coating of copper is applied at an initial low current density followed by full current density to minimize bridging. Preferably an outer layer of nickel is applied, also at an initial low current density, followed by full current density. Annealing before or after application of the final layer of nickel is advisable. This invention also relates to the resulting coin blank and coins.

REFERENCES:
patent: 2061056 (1936-11-01), Baker
patent: 3940254 (1976-02-01), McMullen et al.
patent: 3957086 (1976-05-01), Gondek
patent: 4279968 (1981-07-01), Ruscoe
Lowenheim, "Electroplating", pp. 194-202, 1978.

Affiliated with

Also associated with

Rating

Coins coated with nickel, copper and nickel does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Coins coated with nickel, copper and nickel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coins coated with nickel, copper and nickel will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1248147