Definizione

• Keying.  Marking, or the use of various mechanical aids, to align work in critical positioning; as properly aligning dies. A guide mark or guide pin and bushing are methods of aligning obverse and reverse dies, or parts of a dieset in trimming.  See die alignment.
  Clichés are keyed by the use of punches at three or four places on the interface surface of two thin blanks; metal flows into the punch holes forming a key if the clichés need to be struck a second or subsequent time.  See cliché.

  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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