A plasma treatment apparatus for treating strip-stock material, such as tubing, wire, webs, and the like, by moving the strip-stock through a plasma treatment region of the apparatus provides improved consistency of surface treatment if the tension on the material is maintained within a predetermined...http://www.google.de/patents/US5198033?utm_source=gb-gplus-sharePatent US5198033 - Continuous plasma surface treatment apparatus for running length polymeric tubing