perforations 17 on the surface 3 form annular protrusions 18 thereon formed for gripping the batt and advancing it with rotation of the cylinder 2 in the embodiment shown cylinder 2 has a 43 inch diameter 1 09 meter in one embodiment the surface of cylinder 2 and screen 3 are both formed from 16 gauge stainless steel punched with 9 32 inch 7 14 mm holes staggered on u215c inch 9 53 mm centers resulting in 51 open area through which air may pass the hole pattern is chosen to maximize air flow therethrough a continuous batt of cotton b is pulled into the apparatus on feed apron 16 directing the batt b to top of cylinder 2 by the gripping action of the perforated surface 3 the feed apron 16 is between the feed ramp 134 and the cylinder 2 the feed apron 16 and the feed ramp 134 comprise a feed system for directing the batt b to the lint conditioner apparatus 120 a horizontally pivoted door 5 pivotally mounted on axle 6 pivots open as the fiber batt b is drawn into the inlet air plenum 7 the batt b is in sealing contact with the bottom portion of the door 5 thus disallowing humid air to escape from inlet air plenum 7 into the atmosphere the door 5 also prevents humid air flow towards the battery condenser not shown from which fiber batt b is flowing.