Abstract: A film transport capable of periodically advancing roll film to present a flattened portion of the film at an exposure station between the supply and take-up spools. As originally developed the invention is applied to processing sensitized photographic film. Such a film, even when tightly rolled upon a spool, will exhibit a tendency to curl and bow transversely when unwound from the spool, the face of the film carrying the emulsion curving inwardly. This film transport as an accessory to a paper printer periodically presents to an "enlarger" in the printer successive frame portions of 35mm film or the like, in place of the regularly dispensed sensitized paper, while eliminating the hazard of damage to the image area of the film, this latter feature being achieved by non-use of any pressure plate or hold-down springs which might abrade the film surface and the substitution of means to exert a reverse bending strain on the film and thus to achieve a localized flattening of the film at the exposure station.