Plastic pipe having walls with lengthwise extending channels

Details Plastic pipe having walls with lengthwise extending channels Plastic pipe having walls with lengthwise extending channels

F - Mech Eng,Light,Heat,Weapons

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18/113, 189/25,

F16L 11/00 (2006.01) B29C 53/14 (2006.01) B29C 57/00 (2006.01) B29C 57/02 (2006.01) B29C 65/02 (2006.01) F16L 9/127 (2006.01) F16L 9/18 (2006.01)

Patent

CA 1045992

ABSTRACT OF THE DISCLOSURE Pipes of thermoplastic material comprising inner and outer walls which are interconnected by lengthwise extending connecting partitions which form channels of rounded cross- section, the ends of the channels being each separately closed by sealingly pressing the end walls of a channel against each other after these walls have been heated to a temperature above the plasticizing temperature of the plastic material.

262553

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