| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a protective tube and its manufacturing method capable of simplifying component members and manufacture and reducing costs so that a cylindrically formed flexible beltlike body can also serve as a cylindrical body arranged on an outer cylindrical periphery in the spiral reinforced protective tube protecting a binding material. <P>SOLUTION: A spiral-shaped hard wire urging a flexible beltlike body to an expanded diameter direction are arranged on the flexible beltlike body cylindrically formed by spirally winding while heating at an overlapped position of side ends, and a central ridged groove formed along a longitudinal direction of an inner peripheral face of the cylindrically formed flexible beltlike body at a central section in the protective tube. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
