higher quality cottons and the lint cleaning machinery often uses longer more widely spaced pin or lug type cylinders which would not prevent air flow back into the high speed separator section that is under sub atmospheric air pressure air seal and fiber transfer cylinder 31 is needed for use with such a cleaning cylinder 12 that has longer less dense teeth or lugs that would allow air to be pulled back from the trash removing grid section into the sub atmosphere air pressure housing around the high speed air separator cylinder 17 in the present apparatus as shown in fig2 cylinders 17 31 and 12 all revolve counter clockwise and preferably successively at increasing surface speeds air seal and fiber transfer cylinder 31 primarily acts as what is generally known as a u201c vacuum wheel u201d to make this air seal air seal and fiber transfer cylinder 31 must fit tightly against arcuate walls 37 and 36 both on the fiber carrying side and the return side of the cylinder 31 and it must be constructed to prevent air from passing through the air pressure differential across the cylinder at all times in its rotation also this cylinder 31 must be capable of carrying the fibers around the arcuate fiber transfer side preferably while holding the fiber tufts firmly in place as they enter the pinch point between this.