Patent ID: 7820237
Filing Date: 2010-10-26
Classification: B32B,E04D

Abstract:
1. A method for manufacturing a granule covered roofing shingle comprising: establishing at least two sources of granules; manufacturing coated granules from the at least two sources of granules; establishing a standardized process for manufacturing granules having a standardized appearance, the standardized process including the steps of selecting a uniform color scale value and selecting coated granules that have a color substantially identical to the uniform color scale value, wherein the coated granules are selected from one or more of the sources of granules; transporting the coated granules to more than one shingle manufacturing facility; manufacturing a first granule covered roofing shingle using the coated granules at a first facility; manufacturing a second granule covered roofing shingle using the coated granules at a second facility; sensing the color of the first and second roofing shingle; and determining whether the colors of the first roofing shingle and the second roofing shingle are within an acceptable limit of about 2.8 L*a*b* color units of each other.