A number of product feeders comprise a conveyor underlying a friction wheel operated by a pulsed drive. A continuously rotating drive shaft is coupled to a selected feeder by a controller coupling a drive wheel on the drive shaft with a drive transmission wheel associated with the conveyor of the feeder....http://www.google.es/patents/US5582398?utm_source=gb-gplus-sharePatente US5582398 - Apparatus and method for feeding products from selected product stacks
Apparatus and method for feeding products from selected product stacks
