flights 38 serve upon rotation of the shaft 37 to auger fibers gathering at the apex of the trough 34 toward a tubular outlet opening 39 leading from the hopper housing 16 and connected to a tubular inlet opening 41 of a further housing 42 a pair of laterally spaced rotatable shafts 43 and 44 are synchronously rotated by either a single motor m4 schematically illustrated in fig3 or by separate motors the shafts 43 and 44 are each connected to a ribbon blending blade structure 46 and 47 respectively to define a primary fluffing structure 45 inside the hopper housing 16 the shafts 43 and 44 when rotated cause the fibers to essentially traverse the circumference of the hopper to provide a uniform dispersion of the fibers the speed of rotation of the motor m4 should be from 1 r p m to 200 r p m optimally 100 r p m the fluffed fibers eventually are drawn downwardly by the screw auger or conveyor 37 38 in this particular embodiment the screw conveyor 37 38 is oriented centrally below the shafts 43 and 44 and further the shaft 37 extends parallel to the shafts 43 and 44 further the rotation of the shaft 37 can be the same as or opposite to the rotation of the shafts 43 and 44 the speed of rotation of the shaft 37 is controlled by the speed of rotation of the variable speed motor m3 which effects a precise monitoring of the feed rate of fibers into the outlet opening 39 as the fibrous material enters.