B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 65/02 (2006.01) B23D 21/00 (2006.01) B29C 65/20 (2006.01) F16L 47/26 (2006.01) F16L 47/34 (2006.01)
Patent
CA 2084965
In a method for making a joined pipe, a main pipe is cut so that two V-shaped edges of a right angle are formed in the diametrical positions on the periphery of the main pipe, and a branch pipe is cut so that two peaked edges of a right angle are formed in the diametrical positions on the periphery of the branch pipe. Then, the facets of the V-shaped edges and the peaked edges are fused by heating, and butt-welded under pressure. A heating apparatus includes a heater with a V-shape recessed attachment and a peaked attachment. A cutting apparatus includes a circular rail and a slit inside the circular rail on a base, a clamp for clamping a pipe, and a cutter which moves in the slit. A butt-welding apparatus includes two cradles which can move near to and far from each other, a heater which can position between the two cradles, and a clamp which can rotate on each base.
Kitada Mitsuhira
Seki Kazuo
Yamada Yonekazu
Yoshino Yutaka
Blake Cassels & Graydon Llp
Sekisui Kagaku Kogyo Kabushiki Kaisha
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