Device for the uniform application of small amounts of a powdery material onto surface configurations

Claim 1

Apparatus for applying particulate material to a substantially continuous textile fabric comprising: feed and takeup means for said textile fabric and textile fabric disposed therebetween; centrifugal spreader means assembly disposed above said textile fabric between said feed and takeup means; motive means operatively connected to said spreader means assembly to impart rotation thereto; feed means disposed above said spreader means assembly for depositing particulate material to be spread on said spreader means assembly, wherein said spreader means assembly includes at least one spreader disc, a distributor disc having at its center an aperture therein disposed above said spreader disc and a substantially stationary spiral bead means on said distributor disc for directing particulate material deposited on said distributor disc toward and through said aperture wherein said feed means is positioned to feed particulate material onto said distributor disc and said distributor disc feeds particulate material through said aperture onto said spreader disc, wherein the speed of rotation of said spreader disc and the maximum diameter of said spreader disc are sufficient to cause said particulate material to be centrifuged off said spreader disc in an annular pattern onto said textile fabric which annular pattern has an inside diameter which is larger than the width of said textile fabric.