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2. Punchcutting - Wikipedia

   en.wikipedia.org/wiki/Punchcutting

   Punchcutting is a craft used in traditional typography to cut letter punches in steel as the first stage of making metal type. [1] Steel punches in the shape of the letter would be used to stamp matrices into copper, which were locked into a mould shape to cast type. Cutting punches and casting type was the first step of traditional typesetting ...

3. W.B. Mason - Wikipedia

   en.wikipedia.org/wiki/W.B._Mason

   [6] By March 25, it was reported as a rubber stamp store. [7] The company started as a business that sold printed products, engraved products, and rubber stamps. As the city of Brockton expanded in the early 20th century, largely due to the shoe industry, W.B. Mason expanded its sales offerings to include office supplies. [citation needed]

4. AOL Mail

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5. Mystic Stamp Company - Wikipedia

   en.wikipedia.org/wiki/Mystic_Stamp_Company

   Mystic Stamp Company is an American, employee-owned stamp dealer founded in 1923 by Lawrence K. Shaver (1903 – September 23, 1990). [1] The company is headquartered where it was founded, in Camden, New York. It specializes in the buying and selling of postage stamps, collecting supplies, and other philatelic items.

6. Justus Erich Walbaum - Wikipedia

   en.wikipedia.org/wiki/Justus_Erich_Walbaum

   Walbaum was a punchcutter, who carved steel punches used as a master to stamp matrices, the moulds used to cast metal type. [8] Walbaum was born in Steinlah, a district of the town of Haverlah in modern Lower Saxony. Based first in Goslar and later in Weimar, he created type in the Didone style, also known as the 'rational' or 'modern' style.

7. Punching - Wikipedia

   en.wikipedia.org/wiki/Punching

   The punch force required to punch a piece of sheet metal can be estimated from the following equation: [4] F = 0.7 t L ( U T S ) {\displaystyle F=0.7tL(UTS)} Where t is the sheet metal thickness, L is the total length sheared (perimeter of the shape), and UTS is the ultimate tensile strength of the material.