In a device for producing metal-free strips on vacuum-coated film webs, particularly for capacitors, including a casing 32 with a cover 30 for sealing the casing pressure-tight and a winding unit 29, including guiding and tensioning rollers 5 to 17 which are rotatably disposed between the plates 3, 4, at least one coating roller and a take-off and a take-up roller 35', 37' as well as a coating source 19 supported in the casing 32 and a preferably tubular vessel 34 for receiving a separating agent 33 to be evaporated, for example oil, which is disposed transversely to the running direction of the web and has at least one nozzle 36 for the separating agent 33 to emerge from the vessel 34 onto the film web 50 passing by the outlet nozzle 36 in direct vicinity, the vessel 34 is at least partially filled with a supply of separating agent 33 and is provided with at least one vapor outlet pipe 39 the outlet nozzle of which 36 ends into the coating chamber 45 below the surface level 46 of the supply of separating agent 33 and in direct vicinity of the film web 50 to be coated and the end of vapor outlet pipe 39 which faces away from the nozzle 36 ends in the space 40 of the vessel above the supply of separating agent 33.