US Patent: 2,066,372
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Method of Making Dies or Punches
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Patentee:
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Joseph J. Tomalis (exact or similar names) - Providence, Providence County, RI |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Oct. 03, 1935 |
Granted: |
Jan. 05, 1937 |
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Joel Havens "Vintage Machinery" entry for American Screw Co.
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Description: |
Claim:
An important feature of the invention resides in the construction of a punch comprising a projection or nub extending integrally from a shoulder on the end of a metal bar, wherein the metal of the punch is compressed and upset as a result of cold pressing into a matrix and wherein simultaneously a fillet is formed at the junction of all of the surfaces of the projection and the said shoulder. |
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