BI-METALLIC COIN

摘要

A bi-metallic coin or blank is produced from a disc-shaped core and an annular outer component. The two components are bonded to each other by pressure flow of the material of one component toward the other component. According to the invention, the locking of the two components is secured by bevels at its central opening. The bevels also facilitate the fast speed placement of the core into the ring during the minting operation. The fast speed placement of the core in the outer component is further aided by an outwardly rounded configuration of the periphery of the disc-shaped core. The invention is particularly, but not exclusively, useful in the production of thincoins having the thickness range of about 1.0 mm to about 1.5 mm, where the locking of the two components is difficult to achieve with known methods.