While I was looking for something unrelated, I stumbled over this patent from 1914;
For the mechanically inclined among us – well, the subset of the mechanically inclined that has access to a well supplied workshop at least – it looks like one could put one together in the shed and start cranking out DE-blades for fun and profit… it grinds, wraps, punches, folds, and packs blades – ready for shipment and sale.