Film cartridge assembly with pressure plate
AssigneeEastman Kodak Company
InventorGurdip S. Sethi
Life of this patent
Estimating the term…
Abstract
A photographic film cartridge assembly has front and rear opposed walls between which photographic film is movable to align image areas with an exposure window in the front wall. A film support surface is enterable into the cartridge assembly through the exposure window. An opening in the rear wall is aligned with the exposure window, and a pressure plate is retained on the rear wall for movement toward and away from the front wall. Baffle means on the pressure plate and the rear wall form a tortuous light path to prevent light entering the cartridge assembly through the opening from reaching the film.
Claims12
In a photographic film cartridge assembly having front and rear opposed walls between which film is movable to align image areas with an exposure window in the front wall, and wherein the rear wall has an opening generally aligned with the exposure window through which the film's front surface can be pressed, by a force exerted against the rear surface of the film, against a film support surface of a camera in which the cartridge assembly is received to locate an image area in the camera's exposure plane;
- the improvement comprising:
- a pressure plate;
- means for retaining said pressure plate between the film and the rear wall in alignment with the exposure window and the opening, with a degree of freedom to permit movement of said pressure plate toward and away from the front wall, whereby a force is exerted against the rear surface of the film when said pressure plate is moved toward the front wall;
- and
- baffle means on said pressure plate and the rear wall for forming a tortuous light path to prevent light which enters said cartridge assembly through the opening from reaching the film.
In a photographic film cartridge assembly having front and rear opposed walls between which film is movable to align image areas with an exposure window in the front wall, and wherein the rear wall has an opening generally aligned with the exposure window through which the film's front surface can be pressed, by a force exerted against the rear surface of the film, against a film support surface of a camera in which the cartridge assembly is received to locate an image area in the camera's exposure plane;
- the improvement comprising:
- a pressure plate;
- means for retaining said pressure plate between the film and the rear wall in alignment with the exposure window and the opening, with a degree of freedom to permit movement of said pressure plate toward and away from the front wall, whereby a force is exerted against the rear surface of the film when said pressure plate is moved toward the front wall;
- and
- cooperating surfaces on said pressure plate and the rear wall around the opening for forming a tortuous light path to prevent light which enters said cartridge assembly through the opening from reaching the film.
In a photographic film cartridge having an exposure window in one wall through which the film is to be pressed against a film seating surface in the camera, and a correspondingly located opening in another wall of the cartridge through which camera structure exerts film seating pressure, the improvement comprising:
- a movable pressure plate located in alignment with said opening for transmitting seating pressure to the film,
- baffle means on said other wall surrounding said opening, and
- baffle means on said plate and cooperating with the first mentioned baffle means to inhibit light from reaching the film through said opening, while leaving the plate free to move toward and away from the film.
Dependencies are inferred from the claim text.