Traversing nozzle for applying granules to an asphalt coated sheet

摘要

A method for applying granules to a moving asphalt coated sheet includes providing a nozzle for discharging granules onto a sheet having first and second edges. The nozzle is mounted for movement along a path which traverses the sheet and extends beyond the first and second edges to define first and second extension locations beyond the edges. The nozzle is moved along the path, and the discharge of granules is begun while the nozzle is adjacent or opposite the first extension location, and the discharge of the granules is ended after the nozzle has traversed the asphalt coated sheet and reached the second extension location so that the beginning and ending of the granule discharge do not occur between the first and second edges. The path and the speed of the nozzle can be adjusted so that the deposit of the granules applied to the sheet has a predetermined shape.