Variable thickness shingle
US8309169B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 2010 |
| Grant date | Nov 13, 2012 |
| Priority date | — |
| Expiry date | Sep 17, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04D2001/005
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of manufacturing roofing shingles is provided. The method includes the step of coating a continuously supplied shingle mat with roofing asphalt to make an asphalt-coated sheet. The asphalt-coated sheet has at least one prime portion and at least one headlap portion. The thickness of the asphalt-coated sheet is varied by passing the asphalt coated sheet through compression rollers configured to compress the asphalt-coated sheet and form a formed sheet such that the prime portion of the formed sheet has a first thickness and the headlap portion has a second thickness, different from the first thickness. The formed sheet is passed under a film applicator configured to supply a film to the headlap portion thereby forming a filmed sheet. Granules are applied to the filmed sheet to form a granule-covered sheet such that granules do not adhere to the headlap portion. The granule-covered sheet is cut into shingles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.