How Does Machine doubling occur?

Comments

• mr1931S Posts: 6,661 ✭✭✭✭✭

  March 10, 2003 12:33PM

  Machine doubling is also known as ejection doubling.i think its caused in the split second of time just after the coin is struck from it's not coming cleanly out of the die on ejection.In other words,the coin shifts slightly while in the ejection mode just after being struck and,characteristic of machine doubling, a "shelf",is created on some features of the coin.

  "Great spirits have always been met with violent opposition by mediocre minds."
  Albert Einstein

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• Dog97 Posts: 7,874 ✭✭✭

  March 10, 2003 1:00PM

  I don't like typing too much...read this: Text

  Change that we can believe in is that change which is 90% silver.

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• ursabear Posts: 1,888

  March 10, 2003 1:37PM

  Wow, that is informative. Thank you Mr. Dog. That is in my bookmarks now.
  
  I do get to learn quite a bit here. I'm pretty lucky!

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• coppercoins Posts: 6,084 ✭✭✭

  March 11, 2003 1:41AM

  You can try this thread as well. I typed out a rather long one that explains the difference between machine doubling and doubled dies. It might help you some.

  C. D. Daughtrey, NLG
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• cladking Posts: 29,440 ✭✭✭✭✭

  March 11, 2003 5:52AM

  Mint workers have been quoted as saying that machine doubling is often
  associated with parts of the press being loose. This seem may be especially
  associated with the hold-downs.

  tempus fugit extra philosophiam.

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