定義

• Layer-on.  A part of the feeding mechanism on a coining press which, like fingers, pick up a planchet and places it into coining position between two dies. We know that such
  a tool existed in 1671 by drawings still extant from the Middleburg Mint in Zeeland, Holland. It is unknown if the Dutch had invented this or the technology had been developed elsewhere. (On modern presses it was replaced by an indexing plate.)  See coins and coining.

  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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