The Modern Minting Process Flashcards
Blanks
Punched blanks from sheets of metal
Annealing and Wash
Blanks are sent to the annealing furnace washed and cooled
Upsetting
Die Making
Galvano
Janvier transfer
Who designed Janvier transfer?
Frenchman, Victor Janvier
Master hub
After the master die is produced, it is placed into the hubbing press to create what?
Working Hub-master die create several working hubs
What Mint made all the dies until 1996?
Philadelphia Mint
After 1996 what did Denver and San Francisco facility start doing?
What are the three stages of die preparation?
Hubbing Process
All mintmarks were hand-punched on individual dies until?
1985
In 1985, mintmarks were, added to what, for all proof coins?
master die and following to the original plaster sculpture.
In 1990 the mintmarks were added to the master die stage for what coins?
Cent and Nickel
In 1991 the mintmarks were added to the master die stage for what coins?
Dime, Quarter, and Half Dollar
In 2000 mintmarks were part of what process?
Galvano
In the die making process what design is in relifef, or positive, just as it appears on the finished coin.
The plaster model, galvano, master hubs and working hubs
In the die making process what bears an icuse or negative design?
Master dies and working dies
What four thing does the coin chamber have?
Anvil die, Hammer die, collar and feeder fingers
What is the Anvil die?
Lower die
Anvil die only moves when?
When the coin is ejected
What is the Hammer die
Upper die
Anvil die is usually what side of the coin?
Reverse
Hammer die is usually what side of the coin?
Obverse
What is a ring that retains the planchet metal during strike?
Collar
The collar also serves as a third die creating what?
Reeding and sometimes lettering on the edge
Feeder Finger
Striking process
After minted, what do the coin pass through to catch misshaped coins?
riddler
How many strikes per minute are the machines capable now and in the past?
How many dies can there be in a press?
Modern minting process
