How Does Machine doubling occur?

dlimb2 · March 10, 2003 12:20PM

Taking all answers...please.

mr1931S · 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.

Dog97 · March 10, 2003 1:00PM

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

ursabear · 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!

coppercoins · 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.

cladking · 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.

How Does Machine doubling occur?

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