Machine for welding roof membranes
US4834828A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 1987 |
| Grant date | May 30, 1989 |
| Priority date | — |
| Expiry date | Apr 30, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/18
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A device for welding portions of two overlapping roof membranes wherein a fastening means has been fastened to the lower of the two membranes and wherein there are portions of both overlapping membranes on both sides of the fastening means. The device includes a welding means which can apply welds to the membranes on both sides of the fastening means simultaneously. The welding means includes a nozzle having two outlets, with each outlet applying a heat sealing weld on one side of the fastening means. The device also includes a pair of weighted stitcher wheel assemblies which help to eliminate air pockets for underneath the roof membranes and to maintain the proper alignment of the overlapping membranes. The invention also includes a welding process using the above-mentioned device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.