| 摘要 |
<p>A vertical feed chute includes a feed roll for feeding fibers from a surge section in its upper end to a formation section in its lower end. A stationary, perforated condenser plate is secured to the lower, discharge end of the chute, and has thereon a concave surface which extends beneath the chute discharge opening, and beneath a metering roll that is mounted to rotate in the discharge opening in confronting relation to the condenser plate. A mat of fibers is drawn from the discharge opening into a nip between the condenser plate and metering roll where the mat is compressed and then fed to the input of a carding machine, or the like. The metering roll is mounted for limited reciprocable movement normal to its axis, and toward and away from the concave condenser surface. In one embodiment the roll is positively driven by pneumatic means toward or away from the concave surface depending upon the density of the mat entering the nip. In another embodiment the metering roll is mounted to reciprocate in response to changes in the thickness of the mat; and this movement is used either to increase or decrease the rate at which fibers are fed to the formation section of the chute, thereby to effect a corresponding increase or decrease in the thickness of the mat.</p> |
