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US 5,348,239 AGranted
Photographic film cassette
AssigneeFuji Photo Film Co., Ltd.
InventorMasahiro Enomoto
Life of this patent
Estimating the term…
Abstract
A cassette shell consisting of a pair of shell halves, upper and lower, molded from resin. The cassette shell is disassembled to take out the exposed film for development. When the cassette shell is molded, molten resin is injected so as to form a weld line to encircle the circumferential surface of the cassette shell, along which line the cassette shell is broken by spreading a port portion with a jig. In a preferred embodiment, a groove is formed inside the cassette shell and serves for breaking the cassette shell. In another preferred embodiment, receiving recesses are formed on a juncture between the shell halves for receiving a disassembling jig.
Claims23
A photographic film cassette comprising:
- a spool for winding photographic film thereon in a roll;
- a cassette shell being molded from resin and having a circumferential surface, said spool and said film being rotatably contained in said cassette shell in light-tight fashion;
- a portion of said cassette shell having a mechanical strength which is lower than other portions of said cassette shell to define a circumferential breaking line so as to allow said cassette shell to be broken along said braking line for the purpose of removing said film from said cassette shell after exposure, said breaking line is a weld line formed substantially on a middle portion of said cassette shell by injecting molten resin from both lateral sides of said cassette shell when molding said cassette shell.
A photographic film cassette comprising:
- a spool for winding photographic film thereon in a roll;
- a cassette shell being molded from resin and having a circumferential surface, said spool and said film being rotatably contained in said cassette shell in light-tight fashion;
- a portion of said cassette shell having a mechanical strength which is lower than other portions of said cassette shell so as to define a circumferential breaking line formed on said circumferential surface to allow said cassette shell to be broken along said breaking line for the purpose of removing said film from said cassette shell after exposure, said breaking line is a weld line formed substantially on a middle portion of said cassette shell at least on an outer surface of said film passageway by injecting molten resin from a position opposite said film passageway with respect to said spool when molding said cassette shell.
A photographic film cassette comprising:
- a cassette shell molded from resin;
- photographic film wound in a roll contained in said cassette shell in light-tight fashion;
- a spool rotatably contained in said cassette shell for winding said film thereon;
- a film passageway formed in said cassette shell for advancing a leading portion of said film to an outside of said cassette shell;
- and
- a groove formed substantially on a middle portion of said cassette shell in widthwise direction of said film, said groove extends along an inside surface of said cassette shell, said cassette shell is capable of being broken along said groove in order to remove said film from said cassette shell after exposure.
3 more elements
A photographic film cassette comprising:
- a spool for winding photographic film in a roll thereon;
- a cassette shell, said spool and said film being rotatably contained in said cassette shell in light tight fashion, said cassette shell including two shell components molded from a resin;
- a film passageway formed in said cassette shell for allowing a leading portion of said film to advance to an outside of said cassette shell;
- and
- at least one receiving recess, which is separate from said film passageway, formed on a surface of said cassette shell on a juncture joining said two shell components in order to receive a disassembling jig for disassembling said cassette shell along said juncture to allow removal of said film from said cassette shell after exposure.
2 more elements
A photographic film cassette comprising:
- a cassette shell molded from resin;
- photographic film wound in a roll contained in said cassette shell in light-tight fashion;
- a spool rotatably contained in said cassette shell for winding said film thereon;
- and
- a film passageway formed in said cassette shell for advancing a leading portion of said film to an outside of said cassette shell, said film passageway having a circumferential weld line formed substantially on a middle portion thereof in a widthwise direction of said film when molding said cassette shell, said weld line allowing breaking of said cassette shell along a circumferential surface in order to remove said film from said cassette shell after exposure.
2 more elements
A photographic film cassette comprising:
- a cassette shell molded from resin;
- photographic film wound in a roll contained in said cassette shell in light-tight fashion;
- a spool rotatably contained in said cassette shell for winding said film thereon;
- a film passageway formed in said cassette shell for advancing a leading portion of said film to an outside of said cassette shell;
- and
- a groove, which is separate from said film passageway, formed on an inside surface of said cassette shell at portions thereof which define said film passageway, said cassette shell is capable of being broken along said groove in order to remove said film from said cassette shell after exposure.
3 more elements
Dependencies are inferred from the claim text.