Method and apparatus for sharp color definition on the application of granules to roofing substrates
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United States of America Patent
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Nov 22, 2016
Grant Date -
Mar 12, 2015
app pub date -
Sep 5, 2014
filing date -
Sep 11, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A high speed granule delivery system and method for dispensing granules in intermittent patterns onto a moving asphalt coated substrate includes a granule hopper and a rotationally indexable pocket wheel in the bottom of the hopper. A series of pockets are formed in the circumference of the wheel and separated by raised lands. A seal on the bottom of the hopper seals against the raised lands as the pockets are filled with granules during rotation of the pocket wheel through the hopper. As each pocket is indexed beyond the seal, it is exposed to the moving asphalt coated substrate below and its granules fall onto the substrate to be embedded in the hot tacky asphalt. The speed at which the wheel is indexed is coordinated with the speed of the asphalt coated substrate to form well defined patterns of granules at high production rates.
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Cited Art Landscape
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