| 摘要 |
<p>A composite tube (10) for use in such applications as an automobile heater hose has inner and outer tubes (11, 15). The inner tube (11) has a corrugated central section (12) and cylindrical end portions (14). The outer tube (11) is bonded to the end portions of the inner tube and to the crests of the corrugations. The composite tube (10) has spaced identical end couplings (22), each with a portion extending into and bonded to the associated inner tube (11) end portion, an end part (26) overlying and bonded to ends of the tube portions and an external flange (25) surrounding and bonded to the reinforcing tube end portion. The couplings include circumferentially spaced end reliefs (30) for facilitating connection of the coupling to a tube such as a fluid inlet to or outlet from an associated automobile radiator or the like. The composite tube (10) is continuously formed in a known manner while the end couplings are molded with a novel and improved mold and process.</p> |
