Patent ID: 7638164
Filing Date: 2009-12-29
Classification: B05C,B05D,E04D

Abstract:
1. A method of making shingles comprising: discharging blend drop granules from one or more blend drop hoppers onto first sections of a moving sheet; discharging background granules from a backfall hopper onto second sections of the sheet substantially without applying background granules to the first sections, the second sections being different from the first sections, to form a granule coated sheet; discharging headlap granules from one or more headlap hoppers onto third sections of the sheet; removing excess blend drop granules and excess background granules from the granule coated sheet, and collecting the removed excess blend drop granules and background granules together in at least one prime backfall hopper to form a mixture of excess prime granules; removing excess headlap granules from the granule coated sheet and directing the excess headlap granules into at least one headlap backfall hopper; and discharging the mixture of excess prime granules onto second sections of the sheet.