This week the goal was to make a quick and dirty prototype of the Earth funnel. There are n Fablabs available and not enough time to wait for a commercial laser cut service. So I used a projector, to project the net on to a piece of plywood. I calibrated the scale with a caliper and traced over the net manually then cut it out using a jig saw.

I then clamped the sheets in to a cone profile and used a rivet gun to pop them in place.

Finally I ducttaped the section on to an old plant pot which was congenitally the same diameter and length as the tube we intended to use. A handle cut from an old plastic oil bottle was taped in place.

Note: the purpose of this prototype is to test the mechanical feasibility of using the tool to fill the bags, not the build process or final materials.