Log in or Sign up
Coin Talk
Home
Forums
>
Coin Forums
>
Error Coins
>
Multi Struck Indian!
>
Reply to Thread
Message:
<p>[QUOTE="Conder101, post: 82968, member: 66"]The reverse was the anvil die and the collar die kept the coin metal from getting into the very low area by the edge where the denticals are.</p><p><br /></p><p>Think about how the press parts are arranged before the strike. The reverse die is down in its retracted position and the collar die extends up around it. The previously struck cent is laying half over the coining chamber and is possibly tipped down with it's edge resting on the center of the reverse die. As the obverse die comes down it makes contact with the center of the struck coin and starts forcing it and the collar die down. (The collar die is mounted on heavy springs for just this reason. Otherwise the press would jam, or the collar or obverse die might break.) Th dies start to come together in the center and start creating the second strike on the coin beginning at the edge and moving toward the center of the coin as the dies come together. When the obverse reaches full travel distance, the top surface of the collar die is still above the surface of the reverse die face, so the coin is still inclined upwards slightly and the metal of the coin is not forced down below the surface of the reverse die there at the center of the coin so it never reaches the denticals and they do not appear in the center of the coin. (In the case of a stronger strike those denticals would be the very last thing to be struck up.)[/QUOTE]</p><p><br /></p>
[QUOTE="Conder101, post: 82968, member: 66"]The reverse was the anvil die and the collar die kept the coin metal from getting into the very low area by the edge where the denticals are. Think about how the press parts are arranged before the strike. The reverse die is down in its retracted position and the collar die extends up around it. The previously struck cent is laying half over the coining chamber and is possibly tipped down with it's edge resting on the center of the reverse die. As the obverse die comes down it makes contact with the center of the struck coin and starts forcing it and the collar die down. (The collar die is mounted on heavy springs for just this reason. Otherwise the press would jam, or the collar or obverse die might break.) Th dies start to come together in the center and start creating the second strike on the coin beginning at the edge and moving toward the center of the coin as the dies come together. When the obverse reaches full travel distance, the top surface of the collar die is still above the surface of the reverse die face, so the coin is still inclined upwards slightly and the metal of the coin is not forced down below the surface of the reverse die there at the center of the coin so it never reaches the denticals and they do not appear in the center of the coin. (In the case of a stronger strike those denticals would be the very last thing to be struck up.)[/QUOTE]
Your name or email address:
Do you already have an account?
No, create an account now.
Yes, my password is:
Forgot your password?
Stay logged in
Coin Talk
Home
Forums
>
Coin Forums
>
Error Coins
>
Multi Struck Indian!
>
Home
Home
Quick Links
Search Forums
Recent Activity
Recent Posts
Forums
Forums
Quick Links
Search Forums
Recent Posts
Competitions
Competitions
Quick Links
Competition Index
Rules, Terms & Conditions
Gallery
Gallery
Quick Links
Search Media
New Media
Showcase
Showcase
Quick Links
Search Items
Most Active Members
New Items
Directory
Directory
Quick Links
Directory Home
New Listings
Members
Members
Quick Links
Notable Members
Current Visitors
Recent Activity
New Profile Posts
Sponsors
Menu
Search
Search titles only
Posted by Member:
Separate names with a comma.
Newer Than:
Search this thread only
Search this forum only
Display results as threads
Useful Searches
Recent Posts
More...