Patent ID: 8038851

Claim:
A device for treatment of substrates or flat articles on a passage path through a treatment chamber with a treatment medium, the device comprising: conveying means for conveying said substrates through said treatment chamber; and a contacting roller for electrically contacting said substrates by a conductor device connected to a power supply, said contacting roller being held on a shaft, wherein said contacting roller comprises: a substantially rigid carrier ring having a sleeve part in a longitudinal extension along said shaft and a projecting part provided radially on said sleeve part for engagement on said substrates, wherein said carrier ring has an inner opening whose inside diameter is at least 5% greater than a diameter of said shaft; and an elastic or resilient holder for holding said carrier ring on said shaft, wherein said carrier ring has a normal position on said shaft, in which said carrier ring is seated roughly concentrically on said shaft, and wherein on deflecting said carrier ring from said normal position, said holder builds up a back-guiding force guiding said carrier ring back to said normal position.