Process for producing coin blanks

Details Process for producing coin blanks Process for producing coin blanks

C - Chemistry, Metallurgy

25

D

204/13, 13/16, 2

C25D 5/34 (2006.01) B23P 15/00 (2006.01)

Patent

CA 1198073

ABSTRACT OF THE DISCLOSURE A process for producing blanks suitable for minting into coins includes providing a plurality of appropriately disc-shaped metallic cores, heating the cores to decrease their hardness to less than about 65 of the Rockwell 30T hardness scale, and cooling the heated cores to provide cooled cores with a hardness less than about 65 on the Rockwell 30T hard- ness scale. A plurality of cooled cores are loaded into an electrically non-conducting perforated con- tainer, which is then placed in an electroplating bath. A metallic cladding is electroplated onto the cores, while moving the container angularly about a horizontal axis, until a plating thickness of at least about 0.01 mm has been deposited on each face of each core and a thickness of from about 2 to about 4 times the face thickness has been deposited on the circumference of each core. The cladded core pieces are then removed from the container.

406905

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