Hot plate welding device for bonding roofing membranes
US4743332A · kind A · utility
Inventor
Key dates
| Filing date | Dec 12, 1986 |
| Grant date | May 10, 1988 |
| Priority date | — |
| Expiry date | Dec 12, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/18
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A hot plate welding device designed specifically to apply asphalt membrane roofing material (hereafter referred to as material) without the use of an open flame. The device uses an electrically heated curved platen which heats the material as it is moved across and in contact with the heated platen. A cylindrical pressure roller applies pressure to the material to insure proper adhesion of the entire surface of the material to the roof structure. A variable speed motor is used as a drive motor for the device. This motor is interlocked with a sensor which senses the temperature of the material. If the material is not at proper temperature the device automatically slows down and waits for the material temperature to catch up to application temperature. The device is designed to have a low center of gravity which allows the device to be used on a roof of mild slope and where the device must fit under pipes and other obstacles commonly encountered when applying such roofing materials. The feed mechanism consists of two rollers one of which pivots such that they allow the material to be fed easily onto the heating platen from the surface of the roof while reducing the amount of friction…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.