CANADIAN ERROR COINS - CANADIAN WRONG PLANCHET STRIKES
Wrong Planchet Strikes
wrong planchet strike occurs when a planchet designed for a different purpose,
or has a different metallic content,
is fed into a coining press set up to strike coins from planchets of a specific nature.
do they occur?
"Nine automatic press feeders were made in the shop
during the year and installed on the presses."
is the first reference of automatic press feeders made in the annual Mint reports. From page 14 under
"Plant and Equipment" in the 1961 RCM report,
it is revealed that:
"Much time and effort has been given to material
handling and the principle of automatic feeding has been
applied to the marking machines as well as
extended to nine coining presses. Bulk handling, storing and weighing of blanks
and scissel is gradually being extended, and in the coming year should
see considerable progress in this respect."
we see a continuation of progress made with automatic press feeders.
Also important to note are the comments referring to bulk handling and
storage of blanks. Perhaps the most important fact relating to wrong planchet
strikes comes from page 15 under
"Plant and Equipment" of the 1962 RCM report:
the year, three twenty ton bins and one sixty ton bin were purchased
and installed for bulk storage of blanks. These are being used with a
number of one ton aluminum tote boxes and automatic feed hoppers, in an attempt
to decrease manual labor."
tote boxes have pallet like bottoms which enable them to be moved from one step of the minting
process to the next, with the use of a fork lift truck. At one end of the box,
on the side at the bottom, there is a sliding door. The interior of the box is shaped so that
its contents will flow towards the
sliding door, producing an effect known as gravity feed.
these facts it is easy to imagine the following situations:
a tote box filled with Ten Cents planchets (for
example) is used to strike coins
and is emptied, however, one planchet remained. The same box is then filled with
One Cent planchets and used to strike coins. This time the Ten Cents planchet, now mix with
the One Cent planchets, is fed into the coining
press and struck as a One Cent coin.
a planchet found on the floor is mistakenly
tossed into a tote box or directly into
a press feeder, filled with planchets of a different type.
an odd planchet remains in the automatic press
feeder after the press has been reset to strike a coin requiring a different
it is also possible for planchets to stray in the various steps of
production. For example, an odd planchet left in an annealing
furnace, or in one of the large drums used to clean
These strange coins are subject to the same rigorous
screening as Clips, Off centre’s and other Mint Errors, But, coins struck
on Wrong Planchets with specifications similar to the proper planchets tend
to get by easier and
are unintentionally released into general circulation.
Known types can be group as:
Known types can be group as:
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Changes last made on: 03/14/10