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MrMaxwell · 11-11-2013, 03:53 AM

PS: The machine cannot find wheat pennies, so, pop quiz for you wise guys.

"
Why does my machine reject some wheat pennies?
Check out this chart… it shows why some old Wheats are rejected. They have “mixed” alloys and the sheet stock the mint used was not purified enough. When using a newer sample coin, the machine is comparing the moving coins against the reference coin. If they do not match within a practical window of acceptance, it will reject the coin.

These coins were originally "rejected" by the Ryedale with a copper alloy reference coin installed. I was curious what was going on, so I used an XRAY Flourescence device to measure the metal content/blend in each coin. I think you'll find this chart interesting, as it shows that the coins have a wide variety of elements in the mix.

Can I use a Wheat penny to sort for Wheat pennies?
Short answer…no….Long answer…noooooo.

Here’s why..look at the chart in the Why does my machine reject some wheat pennies?

In the old days, each roll or sheet of copper could have had different alloy content, the purification process just wasn’t good enough, and the Mint had a larger window of acceptable metals in the coins. So…. Each old wheat penny could have slightly different metal/alloy content. "

What would be a good way to solve THAT?
I figured it out in about four seconds...

11-11-2013, 03:53 AM
MrMaxwell Too lazy to set a custom title Industry Role: Join Date: Jul 2005 Posts: 10,057	PS: The machine cannot find wheat pennies, so, pop quiz for you wise guys. " Why does my machine reject some wheat pennies? Check out this chart… it shows why some old Wheats are rejected. They have “mixed” alloys and the sheet stock the mint used was not purified enough. When using a newer sample coin, the machine is comparing the moving coins against the reference coin. If they do not match within a practical window of acceptance, it will reject the coin. These coins were originally "rejected" by the Ryedale with a copper alloy reference coin installed. I was curious what was going on, so I used an XRAY Flourescence device to measure the metal content/blend in each coin. I think you'll find this chart interesting, as it shows that the coins have a wide variety of elements in the mix. Can I use a Wheat penny to sort for Wheat pennies? Short answer…no….Long answer…noooooo. Here’s why..look at the chart in the Why does my machine reject some wheat pennies? In the old days, each roll or sheet of copper could have had different alloy content, the purification process just wasn’t good enough, and the Mint had a larger window of acceptable metals in the coins. So…. Each old wheat penny could have slightly different metal/alloy content. " What would be a good way to solve THAT? I figured it out in about four seconds... Last edited by MrMaxwell; 11-11-2013 at 03:55 AM..