US Patent: 389,139
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| Knife for planing machines
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Patentee:
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| Alexander C. Dumontier (exact or similar names) - Detroit, MI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Dec. 22, 1887 |
| Granted: |
Sep. 04, 1888 |
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Jeff Joslin
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Description: |
| The idea is to sharpen the blade with bevels on both sides: one straight across as is usual, and the other on a bias. When mounted so the cut is parallel to the axis of the cutter-head, the diagonal cutting edge produces a shearing action. The inventor recommends using several short knives rather than one long knife so as to maximize the shearing action. A good idea, but it makes blade changes a nightmare. |
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