Dual exposure photographic apparatus and method
AssigneePolaroid Corporation
InventorPhilip R. Norris
Life of this patent
Estimating the term…
Abstract
There is disclosed an improved image recording method and camera for simultaneously obtaining dual latent images on respective 35 mm and self-developing films. The self-developing film contains a plurality of separate film units arranged on a strip which are sequentially pulled from the camera so that a leading one of exposed film units separate from the strip as the latter is being pulled and after an exposed film unit has been processed. Advancement of the film strip also effects advancement of the 35 mm film.
Claims22
Apparatus for generally simultaneously producing images of a scene on self-developable film and photographic film within said apparatus, the photographic and self-developable films each have successive exposable portions, said apparatus comprising:
- housing means including self-developable film exiting means:
- means for supplying the self-developable film within said housing means;
- camera means disposed within said housing means and containing the photographic film therein, said camera means defining first and second exposure openings, whereby successive portions of the photographic film are presentable at said first exposure opening, and successive portions of the self-developing film are presentable at said second exposure opening;
- means for generally simultaneously exposing the same scene at least a portion of both the photographic and self-developable films at said first and second openings;
- and means for processing an exposed portion of the self-developable film within said housing means;
- and, means for allowing removal of successive ones of the processed exposed portions of the self-developable film from said exiting means;
- means for advancing successive portions of the photographic film to said first opening;
- and, said means for allowing removal of the self-developable film also allows successive ones of the exposable portions thereof to advance from said supply means to said second opening when corresponding successive ones of processed portions are removed from said exiting means;
- further including means for driving said film advancing means of the photographic film in response to removal of the self-developable film from said exiting means, whereby advancement of the self-developable film drives said advancing means until the photographic film is advanced to its next successive exposable portion.
A method of generally simultaneously producing images of a scene on self-developable and photographic films wherein the photographic and self-developable films each have successive exposable portions, comprising the steps of:
- providing housing means with a self-developable film exiting means;
- providing a camera means containing photographic film therein within the housing means wherein the camera means includes first and second exposure openings;
- placing a photographic film at the first exposure opening and placing the self-developable film at the second exposure opening;
- generally simultaneously exposing at least a portion of both the self-developable and photographic films at the first and second openings;
- respectively, with the common scene;
- processing at least the exposed portion of the self-developable film within the housing means;
- and removing at least the processed portion of the self-developable from the housing means;
- whereby the photographic film is advanced in response to removal of the exposed and processed self-developing film from the housing means.
A film assemablage of the instant-developing type comprising:
- a plurality of image receiving subassemblies spaced linearly therealong;
- each of said subassemblies having frangible portions;
- and arresting means on each of said subassemblies for engaging processing means which defines a nip within a photographic apparatus for providing resistance which allows the leadmost frangible portion, in the direction of pulling, to break whereby the leadmost subassemblies separate from the assemblage upon engaging the processing means, said arresting means being movable past the nip when the resulting leadmost subassembly is pulled, wherein said arresting means is comprised of at least a thin member having preselected thickness sufficient for inhibiting the passage of the film assemblage through the nip;
- and for permitting passage of said thin member through the nip at a higher pulling force being exerted on said assemblage than the pulling force which facilitates the breaking of the frangible portion.
A method of separating successive film assemblies, comprising the steps of:
- providing a strip comprising a plurality of discrete film assemblies arranged in a generally linear relationship to one another and each one interconnected to another by corresponding frangible portions;
- providing an arresting means on each of the film assemblies, wherein each of the arresting means engages structure to thereby arrest movement of the film assemblies when the strip is pulled with a pulling force;
- arresting movement of the arresting means on each of the film assemblies, whereby a frangible portion between a leadmost film assembly and a successive film assembly will separate in response to the arresting means engaging structure while pulling forces are exerted on the strip.
Apparatus for generally simultaneously producing images of a scene on successive portions of a strip of self-developable film and a roll of photographic film, said apparatus comprising:
- a housing assembly, a taking lens assembly for directing scene light to both the photographic and self-developable films located at distinct exposure openings, an exposure mechanism operable for taking simultaneous exposures on the photographic and self-developable film;
- a processing assembly for processing each of the self-developable film assemblies which are exposed as the self-developable film assemblies are withdrawn from the housing assembly, a photographic film advancing assembly operable of advancing successive exposable portions of the photographic film to one of said exposure openings;
- and, further including means for driving said film advancing assembly in response to successive withdrawal of the self-developable film strip from an exiting means formed in said housing assembly, whereby withdrawal of the self-developable film drives said advancing assembly unit the photographic film is advanced to its next successive exposable portion.
Dependencies are inferred from the claim text.