Machine Vends Roasted Coffee (Sep, 1949)
Machine Vends Roasted Coffee
When you get your coffee out of this machine, you’re sure it’s freshâ€”roasted right before your eyes while you wait. The Infra Roast holds 150 pounds of green coffee and dispenses it, freshly roasted, at the rate of a pound a minute. The coffee goes first into a cylinder oven (see sketch at right above). There it is roasted by heat from infrared lamps controlled by a photoelectric unit that judges when it’s done by how much radiation the beans reflect (PS, Nov. ’46, p. 214). It next falls into a cooling chamber and then into a hopper. As needed, it is blown up and across the top where the chaff is removed. Scales then measure out an even pound into a bag.