Method of expanding coins for decorative purposes

Details Method of expanding coins for decorative purposes Method of expanding coins for decorative purposes

1974-11-21

1976-06-22

Hall, Carl E.

Metal deforming

By application of fluent medium, or energy field

291606, 29423, 29424, 72378, 72700, B21D 2602

Patent

active

039642844

ABSTRACT:
A method of expanding the diametric size of coins and retaining the impressions, embossings, stamping definitions, or the like, thereon for use in jewelry, medallions, and the like, and which comprises initially placing a coin between two layers of carrier metal having a fluidity different from the fluidity of the metal of the coin whereby the carrier metal expands faster or flows more readily than the coin metal, applying pressure against the coin and carriers until the carrier material and coin metal begin to flow from the center out, removing the slightly enlarged or expanded coin from the initial carrier members and placing the enlarged coin between two additional layers of carrier material for repeating the process until the coin has been enlarged or expanded to the desired end size.

REFERENCES:
patent: 2960763 (1960-11-01), Reichl
patent: 3742745 (1973-07-01), Swenson, Sr.

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