Disclosed is a method for making a film assembly used in a PDP filter positioned on the front surface of a PDP, a film assembly manufactured by the method, and a PDP filter using the film assembly. Each flow circuit includes an upstream and downstream flow orifices arranged in series. Detectors that detect the pattern images on the continuous sheet are disposed at conveying direction downstream sides of image carriers, and positional offset amounts of the pattern images of the colors other than the reference color are computed. The structural support can also be made from a plaque which is already present in the bodily lumen.