Gas separation: apparatus – Electric field separation apparatus – Plural diverse electric fields
Patent
1974-08-19
1976-08-31
Klein, David
Gas separation: apparatus
Electric field separation apparatus
Plural diverse electric fields
354304, G03C 148, G03D 902
Patent
active
039778770
ABSTRACT:
A silver salt diffusion transfer photographic film unit suitable for exposing a photosensitive element in a camera and processing the exposed photosensitive element in a bright place outside the camera. The film unit includes a photosensitive element having a silver halide emulsion layer, an image-receiving element having an image-receiving layer containing silver precipitating nuclei, a light-shielding element to protect the silver halide emulsion layer from ambient light during the development of the film unit in a bright place outside the camera, a container retaining an alkaline processing solution which is rupturable by means of a pressure applying member and positioned to allow the processing solution to spread into a clearance between the emulsion layer of the photosensitive element and the image-receiving layer of the image-receiving element in the form of a layer, a light-reflecting material in an amount sufficient to form a white background for a transferred silver image which is positioned between the image-receiving layer and the emulsion layer or is introduced between the image-receiving layer and the emulsion layer when the processing solution is spread, and a silver halide developer. The image-receiving element and the light-shielding element are juxtaposed in such a manner that the image-receiving layer is faced inward and are fixed at at least one edge thereof to form a composite structure having an opening through which the photosensitive element is introduced between the image-receiving element and the light-shielding element in such a manner that the emulsion layer faces the image-receiving layer. The photosensitive element is imagewise exposed in the camera, introduced through the opening into the composite structure, and passed through a pressure applying member for rupturing the alkaline processing solution container.
REFERENCES:
patent: 3586501 (1971-06-01), Norquist et al.
patent: 3613537 (1971-10-01), Frost
patent: 3647437 (1972-03-01), Land
Fuji Photo Film Co. , Ltd.
Klein David
Schilling Richard L.
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