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From the MAKE Flickr photo pool
Ranjit needed a specific tool, so he made it -
...a double-bladed knife for cutting channels in tape. (Thanks to the tape goddess for encouragement!) I'm gonna try to use it to make flexible circuit boards from copper tape.This could likely also be used carving peel-able areas on 1oz copper board for no-etch circuits - my new invention... on FlickrConstruction method: jam two blades in one handle. (Use a jeweler's screwdriver to wedge the handle slot open to accomodate them.)
Surely such a thing existed already, but I couldn't find one. I imagined a super-deluxe double-knife that architects would use, with a thumbscrew for adjusting the inter-blade distance and everything.
Be very careful with any tool that has doubled blades like this; if you slip and cut yourself by accident the resulting wound is very nasty and will be very difficult to heal properly.
Since I occasionally get cuts from a single blade even when I'm being careful, I'll steer clear of this mod.
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These knives do exists. They're basically the same as this DIY version - a spacer in between two blades. Stained glass makers use them to cut out patterns since they account for the lead in between the glass pieces.
Search for "stained glass pattern knife" if you're interested.
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They used to put 2 blades into a Stanley knife separated with a matchstick.
The resulting slash injuries to opponents proved very difficult to sew up and left horrific scars.
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