DIY Channel cutting blade

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.

Construction 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.

This could likely also be used carving peel-able areas on 1oz copper board for no-etch circuits – my new invention… on Flickr