Reloadable canister with replaceable film spool

A reloadable film canister usable with an adjacent, exterior, sensor wherein the sensor generates electrical signals indicative of film being extracted from the canister, the canister comprising:

• a film carrying core;
• a housing wherein said housing defines an interior film receiving region, said housing being openable to receive said film core, said housing defining a film output slot;
• a support member carried by said housing for rotatably carrying said core;
• a rotation indicating mechanism having a disk with a plurality of radially disposed, spaced apart, rotation indicating elements and wherein said disk is located in said housing and is coupled to said core at least when said core is inserted into said housing, wherein as film is drawn off of said core through said film output slot said disk and said rotation indicating elements rotate in response thereto.

A reloadable film canister usable with an adjacent, exterior, sensor wherein the sensor generates electrical signals indicative of film being extracted from the canister, the canister comprising:

• a film carrying core;
• a housing wherein said housing defines an interior film receiving region, said housing being openable to receive said film core, said housing defining a film output slot;
• a support member carried by said housing for rotatably carrying said core;
• a rotation indicating mechanism having a disk wherein said mechanism includes at least one detectable metal indicator, coupled to said disk, and wherein said disk is positioned inside of said housing and is coupled to said core at least when said core is inserted into said housing, wherein as film is drawn off of said core through said film output slot, each rotation of said disk moves said metal indicator past the sensor at least once.

A reloadable film canister comprising:

• a light-tight housing defining an interior film receiving region and a film output slot wherein said housing is formed with first and second parts which are movable with respect to one another from a closed, light-tight, condition to an open, reloading, condition and then to said closed condition;
• a support member carried by said housing;
• a rotation indicating disk wherein said disk carries a plurality of circumferentially disposed, spaced apart, rotation indicating elements;
• a film carrying core removably insertable into said housing when said housing is in said open condition, wherein said core is rotatably carried on said support member and wherein said core is coupled to said disk within said housing at least when said core is so inserted, wherein said disk rotates with and is usable to detect a rotation of said core in response to film being pulled from said core, with said disk positioned in said housing when said core is so inserted.

A film supply reel usable with a single reel, reloadable, film canister which defines an internal volume, a film output slot and a support element, the supply reel comprising:

• a cylindrical core removably insertable into the canister wherein said core has first and second ends;
• film wound about said core with said film extendable through said output slot when said core is inserted into the canister;
• and
• a film removal indicating disk carried on an end of said core wherein said core carries a surface for rotatably and removably engaging said canister support element and wherein said disk is located in said housing when said core is so inserted.

A film exposing system comprising:

• a film extraction device;
• a sensor of film movement;
• a control element coupled to the device and the sensor;
• and a field reloadable film canister positionable adjacent to the sensor wherein the canister includes
• an openable housing with a film output slot;
• an element carried within the housing, for rotatably supporting a film carrying reel whereby the reel rotates as film is drawn through the output slot;
• an output device which includes a rotatable element having a circular crosssection carried within the housing, at least in part adjacent a side wall thereof at least when the film reel is inserted therein, wherein at least the rotatable element rotates in response to film being drawn off of the reel and wherein the detector senses an indication generated by the device that film is being withdrawn from the reel.