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    • 5. 发明授权
    • Method for plasma treatment of small diameter tubes
    • 小直径管等离子体处理方法
    • US4948628A
    • 1990-08-14
    • US335476
    • 1989-04-10
    • David B. MontgomeryJoel L. Williams
    • David B. MontgomeryJoel L. Williams
    • A61F2/06C23C16/04C23C16/509
    • C23C16/045A61F2/062C23C16/509
    • An apparatus for generating a plasma in the lumen of a small diameter tube includes a housing having a diaphragm which separates the housing into a first chamber equipped with a gas inbleed assembly and a second chamber connected to a vacuum source. Parallel plate electrodes in the first chamber are encased in a dielectric which prevents substantially all plasma discharge external of a plasma zone between the electrodes. A conduit maintains gas flow between the chambers. A bore through the dielectric includes the plasma zone and receives the tube to be plasma treated.A method for treating the luminal wall of a plastic tube includes positioning a tube in the plasma zone, evacuating the chambers, bleeding a gas into the chambers, and delivering radiofrequency power to the electrodes. A long tube may be drawn through the plasma zone, or the dielectric and electrodes may be moved past the tube.
    • 一种用于在小直径管的内腔中产生等离子体的装置包括具有隔膜的壳体,该膜片将壳体分离成装备有气体入口组件的第一室和连接到真空源的第二室。 第一室中的平行平板电极被封装在电介质中,该绝缘体基本上防止电极之间的等离子体区域外部的所有等离子体放电。 导管保持室之间的气流。 穿过电介质的孔包括等离子体区并接收待等离子体处理的管。 用于处理塑料管的腔壁的方法包括将管定位在等离子体区域中,抽空腔室,将气体排放到腔室中,并将射频功率传送到电极。 可以通过等离子体区域拉伸长管,或者电介质和电极可以移动经过管。