Reducing humping of stacked roofing shingles
US8156704B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2011 |
| Grant date | Apr 17, 2012 |
| Priority date | — |
| Expiry date | Feb 28, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24372
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A bundle of laminated shingles is provided. The bundle includes a plurality of shingles having an overlay laminated with an underlay. The overlay has a tab portion with cutouts normally exposed on a roof and a headlap portion. The headlap portion has a lower zone adjacent the tab portion and an upper zone adjacent said lower zone. The lower zone has substantially no granules adhered thereto. The bundle defines a central area that substantially encompasses the lower zones of the stacked shingles. The shingles are stacked such that every other of the shingles is inverted and turned 180 degrees relative to an adjacent shingle. The shingles are double-layered, wherein the lack of granules in the lower zones of the stacked shingles results in the central area of the bundle having a height substantially identical to a height of a remainder of the bundle outside of the central area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.