A ROTORY FEEDER WAS LOCKED UP ON F.N. DUST COLLECTOR. EMPLOYEE WAS TRYING TO FREE IT. HE PUT HISFINGERS ON DRIVE CHAIN & IT JUMPED A TOOTH & PINCHED HIS FINGERS BETWEEN CHAIN & SPROCKET. POWER WAS OFF & FEEDER WAS LOCKED OUT. FRACTURE TO 3RDFINGER & LACERATIONS TO 2ND & 3RD FINGERS ON LEFT HAND.