F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
F16L 9/16 (2006.01) B29C 53/78 (2006.01)
Patent
CA 2517159
This invention relates to a hollow profile (1) used for the manufacture of a spirally wound double-walled thermoplastic pipe, which hollow profile has essentially a rectangular cross section and the wall (2) of the hollow profile intended to form the inner wall of the pipe is thicker than the wall (4) intended to form the outer wall (4) of the pipe. The invention is characterized in that the inner rounding radius (7a) of the edges adjacent to the thicker wall (2) of the hollow profile is considerably larger than the rounding radius (7) of the two other edges of the cavity (6).
La présente invention concerne un profilé creux (1) utilisé pour produire une conduite thermoplastique à double paroi spiralée, ledit profilé creux ayant une section transversale sensiblement rectangulaire et la paroi (2) du profilé creux destinée à constituer la paroi intérieure de la conduite étant plus épaisse que la paroi (4) destinée à former la paroi extérieure (4) de la conduite. L'invention se caractérise en ce que le rayon de courbure intérieur (7a) des bords adjacents à la paroi (2) la plus épaisse du profilé creux est considérablement plus important que le rayon de courbure (7) des deux autres bords de la cavité (6).
Mccarthy Tetrault Llp
Oy Kwh Pipe Ab
LandOfFree
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