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US 2002/0141751 A1Published application
Partial pre-exposure of photographic film
OwnerRobert Lee Craiginventor
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OwnerRobert Lee Craiginventor
Estimating the term…
A photographic film strip in the form of a length of photographic film has a pre-exposed area and an unexposed area. The pre-exposed area is continuous and extends along one edge of the strip between ends of the strip. The unexposed area is also continuous and has a length suitable for making multiple single exposure frames with adjacent frames being separated by a frame line. Upon development the film, an image formed by the pre-exposed section of each print will extend between opposite edges of prints formed by individual frames without the need to preregister the film in a camera The pre-exposure comprises a contact exposure. A strip of film can be placed in contact with a partially pre-exposed master on a cylindrical drum in a light tight housing so that pre-exposed section of the film can be exposed by one activation of an electronic flash located in the center of the drum.
A photographic film strip comprising a length of photographic film having a pre-exposed area and an unexposed area, the pre-exposed area extending adjacent one edge of the strip and comprising a continuous pre-exposure extending from adjacent one end of the strip to adjacent a second end of the strip, the unexposed area also comprising a continuous portion of the film strip having a length suitable for making multiple single exposure frames with adjacent frames being separated by a frame line, whereby upon development the film an image formed by the pre-exposed section of each print will extend between opposite edges of prints formed by individual frames without the need to preregister the film in a camera, wherein the pre-exposure comprises a contact exposure.
An apparatus for pre-exposing a first portion of a photographic film strip for subsequent use in a camera in which a remaining portion of the photographic film strip is to be exposed, the apparatus comprising:
A process for fabricating a photographic film strip having a pre-exposed first portion and an unexposed second portion for use in a camera in which the unexposed second portion will be exposed as successive frames, the process comprising the steps of:
A camera in which a film cannister with a film strip can be loaded and exposed through a film frame aperture located behind a lens, the camera including a shiftable partition located adjacent one edge of the film frame aperture, the shiftable partition being movable between a first and a second position such that when the shiftable partition is in the first position, the film frame aperture is completely open and when the shiftable partition is in the second position, a portion of the film frame aperture along the one edge is blocked to prevent exposure of film behind the shiftable partition, so that the camera can be used with an unexposed film strip when the shiftable partition is in the first position and the camera can be used with a partially pre-exposed film strip when the shiftable partition is in the second position.
Dependencies are inferred from the claim text.