Rolling

Northwest Territorial Mint: Rolled Sheet
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Strips Are Rolled

Once the long, thin strips of extruded metal have cooled, they are trimmed using a hydraulic shearer and prepared for rolling. A highly precise instrument called a micrometer is used to calibrate the precise thickness of each strip of metal. Next, the strips are individually fed into a high-pressure rolling machine and gathered for the next step in the process. After each strip has been rolled, it is inspected to ensure that it meets the specifications for thickness.

After the strips have been rolled, they are then sent to the blanking machine.

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Northwest Territorial Mint: Insights & Ideas
Insights & Ideas
Hot Topic: One Sided?

Having a coin made for mounting? This stagecoach bar was made for mounting on the front cover of a large coffee table book. The blanks for this were made from strips of .999 silver that were much thinner than a two sided bar. The reverse was left blank. Such an approach can be done for a wide variety of presentations.

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Northwest Territorial Mint: In The News

First Steam-Powered Coin Press

Northwest Territorial Mint: Did You Know?Devised and built in France in 1833, the first steam-powered coin press was operated at the U.S. Mint in Philadelphia on March 22, 1836. It quickly replaced the screw press in striking all copper coins and was gradually used to mint half dollars as well. In his report to President Andrew Jackson the following year, the Mint's Director, Robert Maskell Patterson, wrote: "As [other steam presses] are completed, the coining by human labor could be abandoned, and the work that can be executed. in the Mint will be greatly increased."