Abstract: Air lock for introducing and continuously passing a strip of a substrate into and through a vacuum chamber, including an enclosure containing at least three successive rollers in the direction of travel of the strip and between which a passage is made for the strip, the first and third rollers being located on one side of this passage, the second roller being located on the opposite side of this passage, an essentially airtight region being formed between the strip and the first and third rollers and connected to a vacuum pump, a component being provided for adjusting the pressure with which the strip rests on the rollers.

Abstract: A film of a composite material is deposited by electropolymerization onto electrically conductive surface. A mixture comprising a monomer, a substance forming a dopant, a supporting electrolyte and a solvent is subjected to electrolysis in which the conductive surface to be coated is used as either cathode or anode. The cathode or anode is polarized to a potential between the electron transfer between the electrically conductive surface and the monomer. Prior to electrolysis, a solution is made from the mixture containing the substance forming a dopant either as anion, cation, molecule, and/or as undissociated complex.