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    • 7. 发明申请
    • Optical Tube Assembly Having a Dry Insert and Methods of Making the Same
    • 具有干燥插入物的光学管组件及其制造方法
    • US20090074363A1
    • 2009-03-19
    • US12273092
    • 2008-11-18
    • Alan T. ParsonsJody L. GreenwoodKenneth D. Temple, JR.Jason C. Lail
    • Alan T. ParsonsJody L. GreenwoodKenneth D. Temple, JR.Jason C. Lail
    • G02B6/44
    • G02B6/4429G02B6/4403G02B6/4433G02B6/4494
    • An optical tube assembly having at least one optical waveguide, at least one dry insert, and a tube. The at least one optical waveguide is disposed within the tube and generally surrounds the at least one optical waveguide. In one embodiment, the dry insert has a first layer comprising a felt having at least one type of non-continuous filament. The dry insert may also include a plurality of water-swellable filaments. In another embodiment, a dry insert has a first layer, a second layer, and a plurality of water-swellable filaments. The first and second layers are attached together at least along the longitudinal edges thereof, thereby forming at least one compartment between the first and second layers and the plurality of water-swellable filaments are generally disposed in the at least one compartment. The dry insert also is advantageous in tubeless cable designs.
    • 一种光管组件,其具有至少一个光波导,至少一个干插入物和管。 所述至少一个光波导设置在所述管内并且通常围绕所述至少一个光波导。 在一个实施例中,干燥插入物具有包括具有至少一种类型的非连续长丝的毡的第一层。 干燥的插入物还可以包括多个水溶胀长丝。 在另一个实施方案中,干燥的插入物具有第一层,第二层和多个水溶胀长丝。 第一层和第二层至少沿着其纵向边缘连接在一起,从而在第一层和第二层之间形成至少一个隔室,并且多个水可溶胀长丝通常设置在至少一个隔室中。 干插入物也有利于无内胎电缆设计。