US 3,939,483 AGranted

Self-processing camera

AssigneeMinolta Camera Kabushiki Kaisha

InventorsYoshio Kuramoto, Hiroshi Ueda

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Abstract

A self-processing camera is adapted to receive a film magazine containing a plurality of film units mounted in a line upon an elongated leader paper and equally spaced therealong. Each of the film units includes an image recording unit consisting of a photosensitive sheet overlying an image receiving sheet and separable therefrom, and a rupturable portion, containing processing fluid, disposed at one side of the image recording unit. The leader paper is folded to dispose the film units in a superposed stack within the film magazine and the latter has a take-up reel to which is secured one end of the leader paper and is adapted to wind thereon a film unit excluding the image recording unit. After exposure of the foremost film unit, the leader paper is wound upon the take-up reel, drawing the exposed film unit between pressure rollers which rupture the portion containing processing fluid and distribute the latter over the exposed film unit to develop the same, whereafter the film unit is separated from the leader paper and discharged from the camera. The camera includes a rotating member which automatically rotates the take-up reel of the magazine at a controlled rate in response to the termination of exposure and also insures that the take-up reel is rotated to a precise extent sufficient to wind the leader paper thereon by a length corresponding to the distance between the leading edge of one film unit and the leading edge of the next film unit.

A self processing camera having a shutter and an exposure station and adapted to receive a film magazine containing a plurality of self-processing film units arranged linearly and at equal spacing along a leader paper which is folded to stack said film units in superposed relation, each of said film units comprising an image recording unit, a processing fluid containing portion disposed at one side of said image recording unit, and a trap for excess processing fluid disposed on the other side of said image recording unit, said film magazine having an exposure frame which the top image recording unit is positioned to face, said film magazine also having a rotatable take-up reel to which one end of said leader paper is secured and said film magazine further having a guide member for guiding the leader paper and exposed film units;

said self processing camera comprising:
means for mounting said film magazine in said camera with the exposure frame of said magazine in facing relation to the exposure station of said camera;
a rotating member adapted to rotate uni-directionally for rotating the take-up reel of said film magazine to wind said leader paper around said take-up reel in a direction to move the exposed top image recording unit to a developing position at the termination of exposure of the camera shutter;
means including a spring driven member and a drive spring for turning said rotating member;
means for operating said spring driven member in a direction to charge said drive spring;
means for restraining said spring driven member in its spring charged position thereof;
means for releasing said spring driven member from its restrained position in response to the termination of an exposure of the camera shutter to rotate said rotating member;
means for regulating the speed of said rotating member;
a roller rotatably mounted on said camera body and biased relative to the guide member of the film magazine so that said roller is rotated by the movement of the leader paper and the film unit by an amount proportional to the extent of advance of the leader paper through said roller and said guide member;
a cam member rotatable in response to the rotation of said roller;
means for bringing said restraining means to its restraining position when said cam member rotates to an extent which corresponds to the movement of the leader paper to completely discharge an exposed image recording unit.

8 more elements

Abstract

Claims5