h a l f b a k e r yNice swing,
no follow-through.
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Over time the cutting edges in a hole punch become duller end duller, making punching holes harder. This device has two milling heads that are aligned with the punch holes and the (w)hole thing is clamped together, exposing the hole punching devices for sharpening by the milling heads.
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Is there a device you can get to sharpen the milling heads when they get dull? |
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Once the sharpening heads wear down they'd have to be replaced I'm afraid. |
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I've heard people say that punching aluminum foil sharpens a hole punch. I can't quite figure out how this would actally help, but if it makes them feel batter... |
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Maybe since you have a dull hole punch (I'm assuming that's why you came up with the idea) you could try it and report back. |
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Based on [scad]'s idea, I'll try foil and sandpaper and see if I can spot a difference. |
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put it under a pyramid over night |
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The hole punch industry is running scared. This invention could really cut into their sales. + |
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There are a few three-hole punches on the market advertised as self-sharpening. |
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The only reason that this is a two head sharpener, is that is the most common type in the UK. For a reason I've never been able to fathom, we have either two or four holes in our paper here and in the Americas three is far more common. |
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What's needed is a comprehensive sharpening method experiment. I'll have to buy several cheap hole punches, blunt them and then try all the suggested sharpening methods. I'll leave one untouched as a control. However; if I get a life, this may be put on hol(e)d. |
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Why would you want to get a life? Results are what matter, not friends or daylight. |
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