Method and apparatus for monitoring granule coloration on an asphalt-coated sheet
OwnerDavid R. Rodenbaugh, John D. Phillipsinventors
Life of this patent
Estimating the term…
Abstract
A method of producing asphalt strip shingles includes continuously coating a substrate with asphalt to form an asphalt coated sheet, moving the asphalt coated sheet in a machine direction, depositing blend drops of blend drop granules onto the asphalt coated sheet from a blender, providing a signal indicative of the presence of the blend drops at a location downstream from the blender, sensing the color of the blend drops at the downstream location with a sensor, comparing the sensed color of the blend drops with a reference color, and providing a signal indicative of the comparison.
Claims19
A method of producing asphalt strip shingles comprising:
- depositing blend drops of blend drop granules onto an asphalt coated sheet;
- sensing the color of the blend drops;
- comparing the sensed color of the blend drops with a reference color;
- and
- providing a signal indicative of the comparison.
The method of claim l in which the depositing step includes depositing blend drops from a plurality of hoppers, the blend drops from each hopper being of a different color from the blend drops from the other hoppers, and further including applying background granules to the asphalt coated sheet after applying the blend drops to form a granule coated sheet.
A method of producing asphalt strip shingles comprising:
- continuously coating a substrate with asphalt to form an asphalt coated sheet;
- moving the asphalt coated sheet in a machine direction;
- depositing blend drops of blend drop granules onto the asphalt coated sheet from a blender;
- providing a signal indicative of the presence of the blend drops at a location downstream from the blender;
- sensing the color of the blend drops at the downstream location with a sensor;
- comparing the sensed color of the blend drops with a reference color;
- and
- providing a signal indicative of the comparison.
A method of producing asphalt strip shingles comprising:
- making shingles of a first color on a shingle machine including programming a controller with a reference color, depositing blend drops of blend drop granules onto an asphalt coated sheet, sensing the color of the blend drops, comparing the sensed color of the blend drops with the reference color, and providing a signal indicative of the comparison;
- switching the shingle machine to make shingles of another color;
- and
- switching back the shingle machine to again make shingles of the first color, using the programmed reference color for comparing the color of the blend drops.
Dependencies are inferred from the claim text.