| 摘要 |
A thin-walled, flexible and collapse-resistant thermo-plastic tubing has a substantially smooth bore and a helical outer support bead structure. The tubing includes at least one conductor helically disposed within the support bead structure. The tubing comprises a flexible tubing wall formed of a thermoplastic ribbon, the ribbon while molten being helically wrapped repeatedly on itself to overlap a certain amount forming a helical lap joint where successive wraps of the ribbon heat-bond integrally to one another so that an elongate tubular body is formed. The tubing comprises a plateau portion on the flexible tubing wall and defining at least one elongate groove, which converges in a radially outward direction to open radially on the plateau portion. At least one elongate conductor is disposed in one or more grooves of the at least one elongate groove and helically around and along the elongate tubular body. An elongate thermoplastic support bead is disposed helically around and along the elongate tubular body on the plateau portion, the support bead and the plateau portion cooperatively forming the bead structure. |
