Integral film unit with intermediate sheet forming a fluid reservoir with one end portion thereof

摘要

A photographic film unit with lateral and transverse edges having a pair of sheets connected in superposition with a photosensitive layer located between the sheets. A container carrying a quantity of fluent processing composition is arranged to provide for the discharge of the composition to between the sheets. The improvement comprises an integral intermediate sheet disposed between the pair of sheets and coupled to both of them at the lateral marginal portions thereof and separating such lateral marginal portions of the sheets by a predetermined amount. A portion of the intermediate sheet extends from between the pair of sheets at one end thereof and is secured transversely to one of the sheets at that end and is folded away from that sheet over itself within the compass of that sheet to define a compartment for fluent processing composition. The intermediate sheet has a centrally disposed exposure aperture and lateral edges which are in register with the lateral edges of the other sheets. The outer portions of the lateral edges of the intermediate sheet have a greater thickness than does the boundary of the aperture. The differing thicknesses of the intermediate sheet may be formed by machining a portion of the sheet which is originally of the thickness of the lateral edges, or by the utilization of separate spacer rails at the lateral edges.