Plastics sheets having edges to be bonded one to another as well as a plastics joint having at least two weldable regions are prepared, each region having an embedded wire extending along the region. Subsequently, the plastics sheet edges are placed on or in the weldable regions, and an electric...http://www.google.com.au/patents/US5743989?utm_source=gb-gplus-sharePatent US5743989 - Method of welding plastics sheets together and a joint used therein
