Methods of coating sheet material with particulate material

Claim 1

IN A PROCESS OF COATING A SHEET MATERIAL WITH SOLID PARTICULATE MATERIAL, WHICH SHEET MATERIAL IS PRECOATED WITH AN ADHESIVE BONDING MATERIAL, STEPS COMPRISING: PROJECTING PARTICLES OF SAID PARTICULATE MATERIAL HORIZONTALLY IN UNIFORM SUSPENSION IN GASEOUS STREAMS FORMING A PLURALITY OF PARALLEL, INCLINED SUPERPOSED STRATA VERTICALLY SPACED APART TO THE EXTENT THAT THE PARTICLES IN THE LOWER EDGE OF ANY ONE OF SAID INCLINED STRATA ABOVE THE LOWERMOST STRATUM ARE BELOW THE PARTICLES IN THE UPPER EDGE OF THE NEXT SUBJACENT STRATUM; AND PASSING HORIZONTALLY SAID SHEET MATERIAL PRECOATED WITH SAID ADHESIVE BONDING MATERIAL IN VERTICAL POSITION IN A PLANE CROSSING THE PATHS OF THE SAID STREAMS, THE SAID STRATA BEING INCLINED WITH RESPECT TO THE HORIZONTAL DIRECTION OF TRAVEL OF SAID SHEET MATERIAL, WHEREBY THE PARTICLES ARE APPLIED TO A SURFACE OF SAID PRECOATED SHEET AND UNIFORMLY COAT THE SAID SURFACE.