US Patent: 2,778,924
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| Apparatus and method for producing flat surfaces
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Patentee:
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| John P. Hill (exact or similar names) - Detroit, MI |
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Patent Dates:
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| Applied: |
Mar. 22, 1954 |
| Granted: |
Jan. 22, 1957 |
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Jeff Joslin
Vintage Machinery entry for Goddard & Goddard Co.
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Description: |
| The invention is a cutter insert made by electric discharge machining, which produces a cutting edge that is smooth and flat and devoid of cracks or scratches that can be the starting point of a fracture in the edge. In addition, the exact method of production is intended to provide precisely parallel surfaces to minimize the risk of fractures when the insert is clamped into a holder. |
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