and a take up roll 27 are disposed in the take up chamber 22 for transporting a flexible tape shaped base 46 both chambers are maintained at a required differential pressure by cylindrical cans 28 29 30 and 31 and a partitioning wall 32 the flexible tape shaped base is transferred along the surfaces of the cans 28 to 31 synchronously with the rotation of the cans which all rotate in the same direction the base is guided by guide rollers 33 34 and 35 disposed between adjacent cans gaps 36 37 and 38 are formed between the adjacent cans 28 and 29 29 and 30 and 30 and 31 respectively the gaps 36 to 38 are extremely narrow in width but the evaporation surfaces of the flexible tape shaped bases moving oppositely to each other are not in contact with each other evaporation sources 39 40 and 41 are disposed below the gaps 36 37 and 38 and the oblique evaporations are carried out on the flexible tape shaped base 46 through masks 42 43 44 and 45 still another embodiment of an apparatus for carrying out a method according to the invention will be described with reference to fig3 in which like members are designated by like reference numerals as used in fig1 in fig3 two flexible tape shaped bases 3 and 3 39 are provided and the cylindrical cans 4 and 5 are rotated in opposite directions at the same circumferential speed in fig3 the guide rollers 8 and 33 to 35 can be dispensed with thus substantially the same effect can.