Roofing seam installation process
US5520761A · kind A · utility
12Cited by
20References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1993 |
| Grant date | May 28, 1996 |
| Priority date | — |
| Expiry date | Sep 29, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2023/16
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for preparing a lap seam for roofing comprising applying a butyl rubber-containing primer with a mesh pad to the EPDM membrane surfaces to be joined, the primer having an elastomeric solids content of from about 15-20 percent, by weight. Thereafter positioning a splice tape between the primed surfaces to form a seam structure and applying pressure to the structure thus provided to form an adhesively-held lap seam characterized by being water tight and having superior peel strength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.