Abstract: The coating device of the invention, which enables a layer of product to be deposited on a strip (1) travelling between two rotary cylinders (2, 3), is characterized in that it comprises a reserve (8) containing the coating product; a first roller (9) associated with the reserve for continuously taking therefrom a specific amount of coating product; a second roller (10) bearing against one of the rotary cylinders (3, 2), the first and second rollers being parallel and spaced from each other; a third loosely mounted roller (11), bearing on the first and second rollers; means (M.sub.1) for rotating the first roller and imparting thereto a constant preadjusted speed; and means (M.sub.2) for rotating the second roller and imparting thereto a speed equal to the travelling speed of the strip, the first and second rollers rotating in the same direction .