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Coin wrapper. A coin wrapper, sometimes known as a bank roll or roll, is a paper or plastic container for a number of coins. In the 19th century, coins were distributed in large cloth bags and coins were hand wrapped. Since the onset of the 20th century, coin wrapping machines have been in use. The earliest patent for a coin wrapping machine ...
Coining (metalworking) Coining is a form of precision stamping in which a workpiece is subjected to a sufficiently high stress to induce plastic flow on the surface of the material. A beneficial feature is that in some metals, the plastic flow reduces surface grain size, and work hardens the surface, while the material deeper in the part ...
e. In numismatics, the term milled coinage (also known as machine-struck coinage) is used to describe coins which are produced by some form of machine, rather than by manually hammering coin blanks between two dies (hammered coinage) or casting coins from dies. Milled edges of Indian five rupees coins.
The Castaing machine is a device used to add lettering and decoration to the edge of a coin. Such lettering was necessitated by counterfeiting and edge clipping, which was a common problem resulting from the uneven and irregular hammered coinage. When Aubin Olivier introduced milled coinage to France, he also developed a method of marking the ...
Coining (mint) Minting, coining or coinage is the process of manufacturing coins using a kind of stamping, the process used in both hammered coinage and milled coinage. [a] This "stamping" process is different from the method used in cast coinage. A coin die (archaically spelt dye) is one of the two metallic pieces that are used to strike a ...
Coin rolling scams. Coin-rolling related scams are a collection of scams involving coin wrappers (rolls of coins). The scammer will roll coins of lesser value or slugs of no value, or less than the correct number of coins in a roll, then exchange them at a bank or retail outlet for cash. To prevent these problems, many banks will require people ...
Crimp (joining) Crimp tool for 0.14 mm 2 to 10 mm 2 (26–8 AWG) insulated and non-insulated ferrules. Crimping is a method of joining two or more pieces of metal or other ductile material by deforming one or both of them to hold the other. The bend or deformity is called the crimp. [1][2] Crimping tools are used to create crimps.
Stamping (metalworking) Stamping (also known as pressing) is the process of placing flat sheet metal in either blank or coil form into a stamping press where a tool and die surface forms the metal into a net shape. Stamping includes a variety of sheet-metal forming manufacturing processes, such as punching using a machine press or stamping ...