| 摘要 |
The parts are thermally welded together. An Independent claim is included for the corresponding method. Preferred features: In the method, parts (3, 4) of each section are heated close to the polyethylene terephthalate (PET) melting point at 250-280 deg C, for a set interval of 0.5-3 seconds (illustrative), whilst pressing these parts together. During cooling, pressing together is continued. Before cooling, the pressure may be slackened. |
