Sorting apparatus, e.g. for root vegetables such as potatoes, comprises a roller table conveyor which has an inspection area onto which a video camera is directed. An operator uses a hand-held probe or wand incorporating a light source and provided with a pressure-sensitive switch in its tip. The switch...http://www.google.es/patents/US4410091?utm_source=gb-gplus-sharePatente US4410091 - Article sorting apparatus and method
