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<p>[QUOTE="Conder101, post: 3939010, member: 66"]Striking issue. The rims are about the highest relief points of the coin and due to the very slight curvature of the die faces they are also the last areas that come into contact with the dies, they are the last areas to fill. So if the press is running a bit too fast, or the dies are spaced just slightly further apart than they should be the result will be weak or no rims. Rims can be weak from a fast running press because it takes a certain amount of time for the metal to cold flow into the devices and if the press is running too fast the pressure in not applied to the planchet long enough for that flow to occur completely.[/QUOTE]</p><p><br /></p>
[QUOTE="Conder101, post: 3939010, member: 66"]Striking issue. The rims are about the highest relief points of the coin and due to the very slight curvature of the die faces they are also the last areas that come into contact with the dies, they are the last areas to fill. So if the press is running a bit too fast, or the dies are spaced just slightly further apart than they should be the result will be weak or no rims. Rims can be weak from a fast running press because it takes a certain amount of time for the metal to cold flow into the devices and if the press is running too fast the pressure in not applied to the planchet long enough for that flow to occur completely.[/QUOTE]
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