Variable thickness shingles
US7776391B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2006 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Feb 13, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04D2001/005
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of manufacturing roofing shingles comprises the steps of: coating a continuously supplied shingle mat with roofing asphalt to make an asphalt-coated sheet, the asphalt-coated sheet having at least one prime portion and at least one headlap portion, varying the thickness of the asphalt-coated sheet such that the at least one prime portion of the asphalt-coated sheet has a first thickness and the headlap portion has a second thickness, the thickness of the asphalt-coated sheet being varied by passing the asphalt-coated sheet through compression rollers, applying granules onto the asphalt-coated sheet to form a granule-covered sheet, and cutting the granule-covered sheet into shingles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.