I haven't seen anyone mention that, in the shredder video, the blades are all placed flat, parallel to the painting. I don't see how they could have cut anything in that orientation, unless the mechanism is tuned to score the paper by dragging it across the point. Or am I missing something?
An angled razor makes more sense (think about how you shave)... less of a chance that it gets jammed if the paper is sliding over an angled razor rather than vertical.
EDIT: A deli slicer also a good example... it works on an angle... not like a chopsaw
