the outer peripheral surface of the next downstream cleaning saw cylinder without the flow deflecting means entrained air along the outer periphery of the doffing brush cylinder continues to rotate beyond the pinch point of the downstream cleaning saw cylinder the entrained air would continue to rotate along the outer periphery to the point where the doffing brush cylinder again removes ginned fiber from an upstream cylinder it is believed that this entrained air promotes tangling of the fiber thereby increasing the nep count the air control bar 11 prevents substantially all of the air from continuing to flow in the annular space between cylinder 2 and containment 12 any air that does flow in the annular space between cylinder 2 and containment 12 is directed tangentially in a manner which does not alter the path of the fiber being doffed at the pinch point between cylinders 1 and 2 eventually most of the deflected air will be entrained around the outer periphery of doffing brush cylinder 4 fig1 the air control bar 17 has an arcuate surface which is substantially parallel to the outer peripheral surface of the doffing brush cylinder 4 adjacent to the pinch point containment 18 and fiber guide 14 prevent entrainment of trash which was previously thrown out fiber guide 14 which runs the length of doffing brush cylinder 4 prevents the doffing brush cylinder from contacting the fiber until the fiber is near the pinch point thereby aiding in the doffing action air flow continues in the annular space between cleaning saw cylinder 5 and containment 22 and is entrained with the fiber between doffing brush cylinder 6 and containment 23 the entrained air exits the gin housing in lint flue 25 the air control bars 11.