Method and apparatus for manufacturing a granule-covered roofing material by modifying a process parameter in response to measured reflected light
US5283080A · kind A · utility
19Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 10, 1992 |
| Grant date | Feb 1, 1994 |
| Priority date | — |
| Expiry date | Jul 10, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04D5/12
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of making granule-covered roofing material comprises discharging granules onto continuously moving asphaltic material, pressing the granules into the asphaltic material, directing light toward the granule-covered asphaltic material, measuring the reflected light from the granule-covered asphaltic material, and responding to the measured reflected light by modifying a process parameter to effect a change in the reflectance of light from the granule-covered asphaltic material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.