B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 65/30 (2006.01) B29C 65/34 (2006.01) F16L 47/03 (2006.01)
Patent
CA 2143151
For welding tubular plastic parts (1) formed as a compound tube there is used a welding element (20) which is arranged with its inner peripheral surface (23) onprojections (10) of the tubular parts (1) and reciprocally centers them. The welding element (20) has an annular part (21) with a heating coil (22) on its outer contour. The heating coil (22) has coil strands laid in a zig-zag shape which are curved in a U-shape and extend transversely to the peripheral direction of the annular part (21).
Petry Dirk-Alexander
Steinmetz Hans-Werner
Georg Fischer Rohrleitungssysteme Ag
Robic
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