Self-processing camera with asymmetrically grooved roller

Details Self-processing camera with asymmetrically grooved roller Self-processing camera with asymmetrically grooved roller

G - Physics

03

B

95/10, 95/11

G03B 17/50 (2006.01) G03D 9/02 (2006.01)

Patent

CA 1063853

Abstract of the Disclosure A fluid processing apparatus adapted to spread a pro- cessing fluid over a predetermined photosensitive area of a photographic film unit. The film unit includes a first image- recording sheet element that is secured in superposed face- to-face relation with a second image-receiving sheet element. The sheet elements are held together in this relationship by an external binding that is secured to the surfaces of the sheets and overlaps their longitudinal and lateral edges to define, in part, an exposure area of the film unit; the film unit thus arranged is adapted to be processed to produce a visible image as a processing fluid is distributed across the image-recording sheet element coextensive with the exposure area. The fluid processing apparatus includes a pair of rotatably mounted juxtaposed pressure applying rollers that are resiliently urged toward one another and are adapted to receive the film unit and spread the processing fluid between the sheet elements as it is advanced between the rollers. At least one of the rollers includes a pair of asymmetrically spaced apart grooves which receive the longi- tudinal margin portions of the film unit when it is advanced between the rollers of the processing apparatus. The film unit is advanced from an exposure station by the application of an asymmetric force at the corner of its trailing edge. Thus advanced, the film unit approaches the rollers with its leading edge canted with respect to a plane in which the rollers are mounted. The asymmetrically spaced apart annular grooves compensate for the canted attitude of the film unit in order to insure that the processing fluid is properly spread over the exposure area.

262466

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