Definición

• Rolling Fold.  A line on a surface of metal formed by a ridge on the rolled strip caused by excessive roller pressure, which is overtaken and flattened by the rollers. This occurs in a rolling mill when the thickness is being reduced to the required thickness strip for blanking.

  excerpted with permission from

  An Encyclopedia of Coin and Medal Technology

  For Artists, Makers, Collectors and Curators

  COMPILED AND WRITTEN BY D. WAYNE JOHNSON

  Roger W. Burdette, Editor

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