Pre-exposing method for a photographic film and manufacturing method for a lens-fitted film unit
AssigneeFuji Photo Film Co., Ltd.
InventorAkira Haishi
Life of this patent
Estimating the term…
Abstract
A lens-fitted film unit is loaded with a photographic film for which pre-exposure is performed in advance. When the pre-exposure is performed for the photographic film, the photographic film is advanced out of a cartridge shell. The advanced photographic film is pre-exposed every five frames. By performing the pre-exposure for the plural frames at the same time, a process speed of the pre-exposure becomes fast in comparison with a conventional speed. The pre-exposed photographic film is rolled, and is contained in the lens-fitted film unit together with the cartridge shell. As the process speed of the pre-exposure is improved, manufacturing efficiency of the lens-fitted film unit is also improved.
Claims19
A pre-exposing method for performing a pre-exposure on a strip of film wound inside a cartridge, a predetermined image being photographed in a part of each frame of said photographic film by said pre-exposure, said pre-exposed photographic film being contained in a camera to photograph an image of a subject in a remaining part of said frame, said pre-exposing method comprising the steps of:
- advancing said photographic film from said cartridge;
- simultaneously pre-exposing N said frames of said strip, where N is an integer greater than 1 and less than a total number of said frames of said strip, said pre-exposing being performed by projecting light through an original image source and a lens to the strip, wherein the strip, lens, and original image source are spatially separated from one another;
- alternately moving the strip by N said frames relative to the original image source and repeating the pre-exposing step until all said frames of said strip have been pre-exposed, wherein each iteration of the pre-exposing step pre-exposes a different said predetermined image;
- and
- rewinding said pre-exposed photographic film into said cartridge.
A pre-exposing method for performing a pre-exposure on a strip of advanced photographic system (APS) film wound inside a cartridge, a predetermined image being photographed in a part of a frame of said photographic film by said pre-exposure, said pre-exposed photographic film being contained in a camera to photograph an image of a subject in a remaining part of said frame, said pre-exposing method comprising the steps of:
- advancing said photographic film from said cartridge;
- performing said pre-exposure on said advanced photographic film, said pre-exposure being simultaneously performed relative to N frames of said frames where N is an integer greater than 1, said pre-exposure being performed with a projection light from a diapositive disposed under the photographic film, said diapositive having N positive images for pre-exposing said N frames simultaneously, the projection light from the diapositive being projected to said N frames of said photographic film via a magnifying lens, the diapositive being illuminated via an interference filter and a diffusion plate, the interference filter selectively transmitting a suitable light used for said pre-exposure;
- and
- rewinding said pre-exposed photographic film into said cartridge.
A pre-exposing method for performing a pre-exposure on a strip of advanced photographic system (APS) film wound inside a cartridge, a predetermined image being photographed in a part of a frame of said photographic film by said pre-exposure, said pre-exposed photographic film being contained in a camera to photograph an image of a subject in a remaining part of said frame, said pre-exposing method comprising the steps of:
- advancing said photographic film from said cartridge;
- performing said pre-exposure on said advanced photographic film, said pre-exposure being simultaneously performed relative to N frames of said frames, where N is an integer greater than 1, said pre-exposure being performed with a projection light from a diapositive disposed under the photographic film, the diapositive being illuminated via an interference filter, the interference filter selectively transmitting a suitable light used for said pre-exposure;
- and
- rewinding said pre-exposed photographic film into said cartridge.
A pre-exposing method for performing a pre-exposure on a strip of advanced photographic system (APS) film wound inside a cartridge, a predetermined image being photographed in a part of a frame of said photographic film by said pre-exposure, said pre-exposed photographic film being contained in a camera to photograph an image of a subject in a remaining part of said frame, said pre-exposing method comprising the steps of:
- advancing said photographic film from said cartridge;
- performing said pre-exposure on said advanced photographic film, said pre-exposure being simultaneously performed relative to N frames of said frames, where N is an integer greater than 1;
- and
- rewinding said pre-exposed photographic film into said cartridge;
- wherein said pre-exposure is performed with a projection light from a diapositive disposed under said photographic film, said diapositive having N positive images for pre-exposing said N frames simultaneously;
- wherein said projection light from said diapositive is projected to said N frames of said photographic film via a magnifying lens;
- and
- wherein said diapositive is illuminated via an interference filter and a diffusion plate, said interference filter selectively transmits a suitable light used for said pre-exposure, and said diffusion plate diffuses the light passing through said interference filter in order to illuminate said diapositive uniformly.
Dependencies are inferred from the claim text.