FILM CASSETTE CONTAINED PROCESSING FLUID APPLICATOR HAVING PARTICLE TRAPPING ARRANGEMENT

摘要

5742 - U. S. An arrangement for trapping foreign particles such as dust in advance of deposition of processing fluid on a moving run of film strip contained within a multi-purpose film cassette includes at least a pair of longitudinally spaced depending blades forming a recess or channel transverse to the longitudinal axis of the film for collecting dust particles sufficiently large to interfere with the application of processing fluid to the film. Smaller particles which project above the surface of the emulsion on the film strip less than the thickness of the processing fluid coating are permitted to pass through the processing unit without interference to a doctoring surface by which the processing fluid is applied.