PUSHING A ONE INCH WASH DOWN HOSE BETWEEN A TOP ROLLER AND BELT STRUCTURE FRAME DECK FROM THE WIDE SIDE TOWARD THE TIGHT SIDE. HIS SLEEVE CAUGHT IN THE OPERATING BELT ROLLER AND PULLED HIS ARM IN. HE WAS ABLE TO PULL HIS ARM OUT. A BONE IN HIS LEFT ARM WAS FRACTURED AND HIS LEFT ELBOW WAS DISLOCATED.