Protopiper: tape-gun-based 3D printer extrudes full-size furniture prototypes
by Cory Doctorow from on (#ST03)
https://www.youtube.com/watch?v=beRA4sIjxa8
The Protopiper (white paper [PDF]) is a modified tape-gun that extrudes regular, precise lengths of hollow tubing made from packing tape, with which you can prototype room-sized objects at full size to get a sense of the masses and scales involved. (more")