I couldn't guess what this thing was by the CAD drawing, and I got a kick out of the answer. This little device totally seems like something cooked up by a quirky product designer in Japan:
If the accent didn't tip you off, the Fold-Ease actually comes from the UK, and even has an "As Seen on the BBC" provenance (it was on "Dragon's Den.") As silly as it might seem to those of us who don't fold paper all day long, it is an intelligent design that solves a problem, and the little fingernail slit is a nice touch. They run £3.99 for a two-pack.
Large-scale, flashy, design-ey projects often get all of the glory. But I like the idea of inventors developing highly specific, inexpensive little products like this that improve the end user's life in some small way.
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Just ordered one. Partly for the lolz, partly because the SO is crafting some paper bags. Will report back as to how time/blister saving they really are.
What's wrong with a bone folder?
This is the kind of product, I imagine, is the result of easily available 3D printing, whether it is worth the material I don't know, but it's definitely creative problem solving.
Seriously though, in terms of usability, are the wheels an actual benefit? They might lessen resistance but they also lessen manoeuvrability of the finger to only sideways, moreover isn't folding a paper really annoying with something on your index finger? ( I mean the initial bending/folding not the flattening of the fold)