Patent ID: 8486488

Claim:
A method for coating a web of a polymer film with an oxide layer by means of a flame-induced combustion chemical vapor deposition process (CCVD-process) comprising the steps of: supporting the web on an upper section of a circumferential surface of a drum with a surface to be coated facing away from the circumferential surface of the drum, producing a plurality of successive flame bands, wherein each flame band is produced from individual flames originating from individual nozzles of a nozzle matrix, and wherein each flame band includes an outer flame region; sustaining and directing the plurality of successive flame bands in a radial direction from above towards the upper section of the circumferential surface of the drum, rotating the drum, transporting the supported web on the upper section of the circumferential surface of the drum, through the plurality of successive flame bands, which flame bands extend at a distance from each other across a width of the web, and are sustained by being fed with a gas mixture comprising a combustible gas, an oxidant and a compound which is decomposed in the flame bands to form reactive particles to be deposited on the surface, wherein the gas mixture is exhausted upwards between the successive flame bands and wherein neighboring outer flame regions of successive flame bands converge with each other and continue towards exhaust means arranged between the flame bands, and keeping the circumferential surface of the drum at a predetermined temperature, and thus cooling the film surface opposite the surface to be coated.