Instant film unit
AssigneeEastman Kodak Company
InventorGerald M. Poshkus
Life of this patent
Estimating the term…
Abstract
A photographic film unit, which includes a photosensitive sheet and a cover sheet separated by a spacer, is provided with a small access port for introducing a processing fluid from the exterior of the film unit into the space between the sheets and a small venting port for releasing air displaced from such space by the introduction of the processing fluid. The spacer surrounds substantially the entire edge perimeter of the film unit in a border area thereof. The access and venting ports extend through the spacer in this border area at diagonally opposite corners of the film unit.
Claims7
A photosensitive unit processable by a low viscosity processing fluid and comprising:
- a first sheet including a layer of photosensitive material, a second sheet superposed with said first sheet for aiding in distributing the processing fluid over the photosensitive material, means for permanently securing said sheets together in closely spaced relationship around substantially the entire periphery of the sheets, a small access port extending from the exterior of the film unit into the space between the sheets which port comprises essentially a point source, uneffected by the orientation of the unit, for introducing the processing fluid into such space, and a small venting port extending from the space between the sheets to the exterior of the film unit for releasing air displaced by the processing fluid when the fluid is introduced into such space.
An instant photographic film unit processable by a low viscosity fluid;
- said film unit comprising:
- a first sheet including photosensitive material for recording a latent image processable by the fluid to form a visible image;
- a second sheet in superposition with said first sheet for confining the processing fluid between said first and second sheets;
- means for spacing said sheets apart to accommodate a layer of predetermined depth of the processing fluid between said first and second sheets, said first and second sheets being secured to said spacing means substantially entirely around the periphery of said sheets;
- a small port located at one end of the film unit and extending from the exterior of the film unit into the space between said sheets for introducing the processing fluid into such space;
- and
- a small vent located at the opposite end of the film unit from said port and extending from the space between the sheets to the exterior of the film unit for releasing air displaced by the introduction of the processing fluid.
An instant photographic film unit processable by a fluid, said film unit comprising:
- a first sheet carrying photosensitive material for recording a latent image processable by the fluid to form a visible image;
- a second sheet in superposition with said first sheet for confining the processing fluid between said first and second sheets;
- a generally rectangular spacer between said first and second sheets extending substantially entirely around the periphery thereof for spacing said sheets apart to accommodate a layer of predetermined depth of the processing fluid, said first and second sheets being secured to said spacer substantially entirely around said periphery;
- an access port extending from the exterior of the film unit into the space between said sheets and disposed for introducing the processing fluid into such space at one corner of said rectangular spacer;
- and
- a small vent disposed diagonally opposite said access port for releasing air from between the sheets displaced by the introduction of the processing fluid.
Dependencies are inferred from the claim text.