Part VI. Striking Errors:

Foldover Strikes:

Axial fold

Definition: Due to a misfeed or ejection mishap, a planchet or coin momentarily ends up in a vertical position, and is folded over by the impact of the hammer die.

Schematic illustration of an axial fold. The rectangles represent the hammer and anvil dies respectively. The open circle represents the planchet/coin standing on edge. The thick black horizontal line running across the equator of the circle is the location of the fold.