Abstract: There is provided a microfilm cassette capable of reducing the case size and obtaining a rational arrangement of elements such as reels and photographic roller. The microfilm cassette includes: a case having a substantially rectangular shape as viewed from the top; a supply reel and a take-up reel mounted inside the case and arranged adjacent to each other horizontally in the length side direction of the case; a photographic opening located around the center of one short side of the case; a photographic roller arranged in a position opposite to the photographic opening; and a shutter for opening and closing the photographic opening. The short side of the cassette case on which the photographic opening is located may be bulged and expanded outwardly around the center of the photographic opening, so that the mark taking lens and the image taking lens can be arranged close to each other.

Abstract: Film cassette with a housing in which a film supply container and a film takeup container are provided in housing halves 11, 12 arranged side by side to receive an exposed and unexposed film, a cassette window mountable on the film guide surface of a motion picture camera, and a cassette drive. Between housing halves 11, 12, a turning loop device 2 is arranged in which the film is guided from one housing half 11 to the other housing half 12.

Abstract: A film magazine having a case adapted to be mounted in fixed position adjacent a motion picture camera that is adjustably movable along a fore and aft axis. The magazine includes a film slot and a film guide assembly movable along the length of the film slot for guiding the film in light tight relation through the film slot regardless of the position of the camera. The arrangement does not require rethreading of the film following each change in camera position.

Abstract: Film boxes for attachment to and use with a camera are keyed and secured by thumb screws to a shutter housing of the camera to permit detachment and accurte reattachment. Light restrictive devices negate transmission of light into each film box upon removal of same. A longitudinally displaceable film reel drive permits rapid disengagement and reengagment of the film boxes without careful alignment and a belt drive prevents, through slippage, film tearing forces.

Abstract: An image recording apparatus having a sheet cartridge which stores therein an elongated photosensitive recording medium. A locking mechanism is provided selectively engageable with the sheet cartridge or a light shielding member which is positioned to prevent the cartridge from being exposed to light. A control means is provided to provide locking state of sheet cartridge or the light shielding member by controlling the locking mechanism to its locking position. This control is made in response to a signal indicative of the installation of the sheet cartridge at its predetermined position. The control means is also adapted to provide unlocking state of the sheet cartridge or the light shielding member by controlling the locking mechanism to its unlocking position. This control is made in response to a signal indicative of the complete discharge of the elongated photosensitive recording medium out of the sheet cartridge.

Abstract: In a cassette for accommodating therein a photo-sensitive recording medium, a pair of cassette halves formed of synthetic resin are united together to form a cassette body having defined therein an accommodating chamber for the recording medium. A drawing opening is formed in an outer surface of the cassette body. The recording medium is drawn out of the accommodating chamber through the drawing opening. An optically inert feed passage is defined by cooperation of a wall section of one of the pair of cassette halves with a wall section of the other cassette half when the one and other cassette halves are united together. The feed passage has one end thereof communicating with the accommodating chamber and the other end communicating with the drawing opening such that the recording medium passes through the feed passage when the recording medium is drawn out of the accommodating chamber through the drawing opening.

Abstract: A roll film driving device is capable of accommodating different film cartridges housing reels of different coupling methods to a driving shaft and forwarding and reversing the reeled film by coupling the reel with the driving shaft. The driving shaft is provided with different coupling members respectively adapted to different reels of the film cartridges, wherein each coupling member is bound to the driving shaft in the rotating direction but is axially movable between a coupled position and a noncoupled position, and a coupling member matching the reel of the loaded cartridge is selected to make such movement.

Abstract: An image formation apparatus has a detachably attached cartridge having a box for containing a roll of unused photosensitive sheet and a take-up shaft which is unistructurally formed with the box and serves to wrap up the used part of the photosensitive sheet. Holding plates which serve to guide the used part of the photosensitive sheet towards the take-up shaft are pressed against the take-up shaft automatically when a cover for the cartridge is opened.

Abstract: A film cassette contains a film spool which is rotatable in an unwinding direction to propel a filmstrip including an integral film leader out of the cassette and is rotatable in a winding direction to wind the filmstrip including its film leader back into the cassette. The film leader has a magnetic area on which alterable data can be magnetically written and read to indicate whether the filmstrip is completely exposed or is only partially exposed. Thus, when the film leader is wound into the cassette the data will be protected and when the film leader is propelled from the cassette the data will be made accessible to read and alter it.

Abstract: A film magazine for a motion picture camera has film rolls mounted on a movable carriage so that the magazine's center of gravity remains fixed as film is exposed. A feed spindle and a take-up spindle are mounted on a carriage which is longitudinally movable within the magazine housing. As film is fed into the camera it passes over a sprocket which drives the carriage through a gear train. The displacement of the mass of the carriage compensates for the transfer of film from the feed roll to the take-up roll, thereby maintaining a constant center of gravity.

Abstract: A film cassette has a bi-directional film transport capable of being driven externally of the cassette and having both extremities of the film enclosed within the cassette. In the cassette a pair of film reels are rotatably supported in symmetrical relation to a diagonal plane, defining an axis of symmetry for the cassette, and extending between the reels and bisecting a corner of the cassette. The two exposure windows are adjacent the corner at respective opposite sides thereof and in symmetrical relation to the plane. Guide means adjacent the exposure windows in the cassette establish a film path between the film reels. The cassette can be selectively inserted into a cassette chamber in a camera in either of two modes of orientation to present a selected one of the exposure windows to the optical path in the camera.

Abstract: A film roll container is disclosed of the type having mating receptacle and cover portions. The portions have facing laterally extending central spindles for rotatably supporting opposite ends of a film roll when the cover portion is mounted on the receptacle portion. The portions further have securing means comprising a plurality of spaced-apart first and second mating frusto-conical bosses. The first boss has a flat end portion having an annular recess such that the end portion in cross section is W-shaped. The second boss has an axial V-shaped cavity in the end thereof such that the second boss defines a projection of W-shaped cross section which is nestable in light-tight relation within the annular recess.

Abstract: A photographic printer is provided with a printing table, a film carrier disposed on the printing table, and a film container removably disposed adjacent the film carrier on the printing table so as to collect a film intermittently emerging from the film carrier after exposure. The film container is provided with a film guide member therein for causing the film to be coiled.

Abstract: A roll film magazine frame for supporting a film spool which receives a roll film and for inserting through an insertion opening into a shaft of a micro roll film reading device, the roll film magazine frame comprises a polygonal body part having a plurality of sides and a plurality of corners each between two adjacent sides, the body part having a recess provided in one of the sides for introducing a film from a film coil into the reading device, an opening provided in another side for introducing a friction member of the reading device for contacting a roll film on the film spool, the side of the body part including a further side which is accessible from outside when the magazine frame is inserted in the shaft, the further side being formed as a cover which is turnable outwardly away of a remaining portion of the body part so as to allow withdrawal of the film spool from the body part and insertion of another film spool into the body part.

Abstract: A pair of light-shielding film cases of similar construction, such as may be used in a surveillance camera, having a simple construction but providing improved film running performance. The light-shielding film cases accommodate a film supplying spool on which a film has been wound and a film winding spool on which the film is taken up. At least one roller is provided in each of the film cases. The film cases each have a cover and a winding knob, the latter also serving as a spool bearing and being mounted on a respective one of the covers.

Abstract: A device for automatically metering and displaying the footage of delivered film contained in each of a plurality of interchangeable magazines adapted to be mounted on the body of a cinematographic camera comprises, on each magazine, an assembly of coded identification marks peculiar to each magazine. On the body of the camera, there is provided a device for reading and identifying the various assemblies of coded marks borne by the various magazines. The camera includes a memory with a plurality of zones allocated respectively to the various magazines and permanently containing information relative to the footage of flim consumed in each magazine. The camera also includes a microprocessor receiving signals coming from the device for identifying the magazines, as well as a metering pulse emitted by a pulse generator coupled to the motor driving the film and emitting a pulse for each image.

Abstract: A film cartridge is provided to hold an endless film strip for storage and display. The cartridge includes a pressure support plate to hold the film in a focus plane for projection, which plate is a resilient, generally ellipsoidal loop with a front projection opening and means for securing the loop to the cartridge in a position to resiliently and uniformly press against the perimeter of the front opening in the cartridge to thereby guide and control motion of the film strip.

Abstract: A case provided with an information carrier consisting of a tape, one side of which has a structure carrying optically readable information as well as an apparatus for writing, reading or erasing such information. In the dustproof case containing a tape having on one side a structure carrying optically readable information, the tape is accomodated on two reels. The case is provided with one window through which a part of the tape between the reels is visible and with pressing means for urging that visible part of the tape against the window. This pressing means may be a wheel and the window may have the shape of a cylindrical lens.

Abstract: A film magazine is provided adapted for running the film stored therein either forward or backward. A first brake within the film magazine provides a drag torque on the supply hub when the supply hub rotates in the forward direction but not when it is rotating in a backward direction. In addition, a second brake is provided for exerting a drag torque on the take-up reel when the take-up reel is rotating in a backward direction, but not when it is running forward.The brakes and motors within the film magazine are adapted so as to keep tension on the film at all time.

Abstract: The attachment cassette for roll film, cassette type camera is provided with sliding control member which simultaneously controls the displacement of film pressure plate relative to a film gate opening, and a shifting movement of a flexible control member for the opening. The flexible control member is in the form of a steel band which is slidably guided in the cassette housing and is provided with transverse score lines to facilitate manipulation.

Abstract: The invention is applied to a cover of a housing which is positioned by sliding into grooves provided for this purpose in the edges of the housing or of the cover. The invention consists in that the housing is provided on the inside with a shaft constituting the lock which is adapted to slide solely parallel to the lateral walls of the housing, in that the cover is provided with a recess situated opposite the shaft when the housing and the cover are joined together and, in order to obtain the locking of the cover, in that the shaft is caused to slide until one of its ends penetrates into the recess. Blocking means which can be automatically locked and can be unlocked are provided for holding the shaft of the lock in its locking position.Application: for covers of housings of a magazine of a camera.

Abstract: A cartridge handling device adapted to be loaded with a cartridge having a roll film wound therein for feeding out the film from the cartridge is characterized by a misloading preventing member provided in a cartridge mount of the device and engageable in an opening formed in the side face of the cartridge toward the proper direction of loading to thereby permit the cartridge to be loaded as oriented only in the proper direction.

Abstract: A film magazine for a motion picture camera contains apparatus for maintaining the tension in the film strip from the supply reel and in the film strip to the takeup reel, within predetermined limits, to permit start-and-stop operations of the camera while minimizing danger of damage to the film. The supply reel is connected to an eddy current brake, and a takeup reel is powered by a motor responsive to a tension control device. The eddy current brake on the supply reel provides braking torque of relatively high magnitude when the supply reel is large in diameter, and the braking torque reduces gradually to a minimum as the diameter reduces.Tension in the film strip leading to the takeup reel is controlled by a tension measuring device which acts to vary the power delivered to the motor driving the takeup reel, to obtain uniform winding tightness.

Abstract: A cartridge including a cylindrical hub attached to a housing, which hub has a central opening and a slot extending axially across the width of the hub and communicating with the central opening, and an endless length of magnetic tape having a major portion wrapped about the hub to form a coil and a minor portion extending from the innermost wrap of the coil, through the slot and around the side surface of the coil to the outermost wrap of the coil. Means on the housing define a tape path for the minor tape portion including a spring biased movable guide pin that provides a desired low, predetermined tension in the outermost wrap of the coil. A portion of the hub can be moved radially to adjust the length of the minor tape portion and thereby position the guide pin in a predetermined portion of its range of movement, and a lock assembly is provided for restricting movement of tape in the coil during shipping, which lock assembly is automatically released when the cartridge is inserted into a machine.

Abstract: A multipurpose audio/visual film cassette (10) including supply and takeup spools (26, 28) in which opposite ends of a film strip (30) are coupled for alternate winding and unwinding during passage through a first path for film exposing, processing and projecting operations with an audio tape (54) also coupled at least on one end with the supply spool (26) and interwound with the film strip (30) to pass through a separate path, and a stripping and separating web (80) is coupled at least on one end to the supply spool (26) and preferably extending directly to the takeup spool (28) in a third path with the web (80) being arranged to overlie the side of the film strip (30) on which processing fluid is deposited and wound in convolutions between such side and the audio tape (54) to prevent adherence of the audio tape (54) to the film strip (30) and to strip a negative emulsion layer from the film strip (30) after processing.

Abstract: A photographic system is disclosed herein having a film reel-to-reel cartridge insertably received into a camera having a high speed film advancement or transport mechanism and a projector adapted to immediately develop the film and project moving images onto a screen. The advancement mechanism includes a support plate for movably supporting a pair of elongated members substantially normal with respect to each other. Each member is movably mounted on the plate and their adjacent and opposing ends move in a substantially oval manner by respective or associated eccentric drives. One member includes a film opening registering pin while the other member includes a film drive claw. The eccentric drive times the pin and claw so as to properly advance the film through the camera between its supply and take-up reels.

Abstract: A multipurpose photographic film handling cassette is provided with a modular fluid processor assembly which is adapted to be initially supported, during cassette assembly, within the cassette housing in a preliminary assembly position wherein it is spaced from the path of the film strip and wherein it cooperates with at least one of the other cassette components to thereby permit such component to also be in a preliminary assembly position within the housing. The modular processor is displaceable from its preliminary assembly position to a final assembly position wherein the processor is supported in operable engagement with the film strip. Such movement also results in movement of one or more other cassette contained components from preliminary to final operable positions.

Abstract: The safety-latching mechanism according to the invention is in particular used for a camera which is disposed in the cockpit of an aircraft and which is subject to acceleration on the order of 10 g. The film magazine is interchangeable in flight by the pilot. For effectively attaching the magazine to the camera body, the mechanism comprises three fixing points. At least one fixing point, which is of a first type, comprises a centering cam which cooperates with a bore. At least one other fixing point, which is of a second type, comprises a latch, which is pivotally mounted on the camera body and which, against the action of a spring, presses against an insertion surface or a blocking surface on the magazine. The two surfaces adjoin each other and are disposed near the bottom wall of the magazine.

Abstract: A multipurpose film handling cassette of the type in which a photographic film strip is exposed, processed and projected without removal of the film from the cassette is provided with a two-piece "balanced force" arrangement for signaling to the apparatus with which it is to be used the unprocessed or processed condition of the film within the cassette. By "balanced force" it is meant that the indicating elements do not rely on any inherent deformation or internal resiliency to move the elements from an unprocessed mode to the processed mode. Further, no external force is required to act upon the terminals to hold them in a desired position.

Abstract: An applicator is provided for depositing a coating of processing fluid on a moving run of photographic film strip which includes a single fluid reservoir having an opening in an exterior surface through which processing fluid may pass. A nozzle plate is provided also having a fluid opening therein and a reservoir facing surface which is configured to be urged toward the reservoir exterior surface and to sealingly engage and to cooperate with the reservoir surface so that fluid may flow through the nozzle plate opening when the plate and reservoir are in such confronting relation. A tear tab is initially interposed between the reservoir and the nozzle plate in sealing engagement around the opening in the reservoir exterior surface so that it initially seals processing fluid in the reservoir. Removal of the tear tab from the reservoir results in release of the fluid contained therein.

Abstract: A camera in which a standard film, 120 or 220 size is loaded behind the picture plane by using a standard film reel with film spool mounting members and means for guiding and holding the standard film and in which film back exchange is not carried out. The standard film reel is designed to be detachably mounted in the camera through an opening formed in the rear part of a reel accommodating chamber in the camera. The standard film can be replaced by a 70 mm film reel which is provided with mounting members for mounting a 70 mm film magazine outside and reel accommodating chamber and means for guiding said 70 mm film into the reel accommodating chamber and holding it therein. This is designed to be detachably mounted in the camera to thereby allow said camera to commonly use standard film and 70 mm film.

Abstract: A cartridge is disclosed for an audiovisual filmstrip projector. The cartridge holds a filmstrip and a standard magnetic tape cassette. Spring hooks are provided on a mounting plate of the cartridge for releasably attaching the cassette by a single motion of pressing the cassette toward the mounting plate and for allowing removal of the cassette from the cartridge by a single motion of pulling the cassette away from the mounting plate.

Abstract: A photographic system is particularly adapted for use in a check security system and offers novel features and advantages for such systems.Such system includes a film cassette and film cassette holder. The film cassette may be molded from plastic parts and can be adapted for assembly and operation without fasteners. The film cassette forms a light tight enclosure with a first opening to admit an image and expose the film within the enclosure and a second opening to permit operation of a film take-up within the cassette. The system includes shutter means adjacent the image-admitting opening of the cassette that can be operated by an actuator carried by the cassette holder. A second actuator carried by the cassette holder can engage and operate the film take-up of the cassette. The cassette can movably carry elements of the system shutter means and provide reliable film take-up and film guidance within the cassette enclosure.

Abstract: A cord is wound on and off of a pair of drums in a microfilm reader. The cord comprises a strip of microfilm of approximately 1 mm width, encapsulated in a transparent material to protect the film from scraping, scratching and the like as the same moves through a microfilm reading apparatus. The film may be processed in a variety of techniques to record information thereon, and after the recording process the film is encapsulated between a pair of translucent members into a cord which is then wound upon one of the drums and attached at one end to the other drum. The two drums carrying the cord are mounted in a capsule which is a replaceable component of a microfilm reader. Each of the drums is provided with a driven gear and the reader is provided with a pair of driving gears for engagement with respective ones of the driven gears.

Abstract: A device is disclosed for use by a person for viewing material on film in a cartridge comprising a viewing screen, a projection module, a cartridge module, a lens system, a gear system for advancing the film, and a gear system for reversing the film.

Abstract: Method and apparatus for covering a sealing surface of a sealing strip which releasably seals processing fluid in a film cassette contained fluid processor. The apparatus includes a flap portion connected to the sealing strip in a manner which enables the flap to overlie the sealing surface when a leading end of the strip connects to and moves with a strip of film during rewinding of the film onto a film spool so as to effect release of the processing fluid.

Abstract: A fluid applicator is provided for depositing a coating of processing fluid on a moving run of photographic film strip which includes a single fluid reservoir which comprises an integrally formed nozzle assembly which includes an opening through which processing fluid may be released and a downwardly facing doctoring conformation for expressing the desired layer of processing fluid upon the film strip emulsion. A processing fluid sealing tear tab is positioned directly upon the downwardly facing surface of the processor and is sealingly engaged therewith by a suitable adhesive material. The tear tab is provided with means attached thereto at one end for assuring removal of substantially all of the adhesive material carried by the doctoring conformation upon removal of the tear tab to thereby assure a substantially clean adhesive free surface to be presented to the film strip during the processing fluid deposition.

Abstract: A microfilm cassette for use in an optical projection device in which a film plane is established within the cassette by a film platen supported by the cassette. An additional aspect of this film platen is its support structure which enables it to move transversely with respect to the cassette. A predetermined surface on this film platen is biased against a predetermined surface within the projection device to establish and control the relationship between the film plane and the projection device's optics.

Abstract: An arrangement is provided for reducing the force imparted at the junction between the pull strip and the film strip in a multipurpose film cassette wherein the pull strip is employed to remove a tear tab closure initially sealing a supply of processing fluid. The pull strip is formed with a free end portion adapted to engage a tactile discontinuity in the film strip upon winding of the film strip upon a film spool. The pull strip is provided with a strip of high friction material which, upon continued advancement of the film strip, engages the surface of the outermost convolution of film strip advancing to the reel and which, upon such engagement with the film strip, cooperates with it to resist at least a portion of the force imparted through the pull strip during removal of the tear tab closure, thereby reducing the force imparted to the junction between the pull strip and the film strip.

Abstract: A multipurpose film handling cassette of the type in which a photographic film strip is exposed, processed and projected without removal of the film from the cassette is provided with a one-piece indicating element for signaling to the apparatus with which it is to be used the unprocessed or processed condition of the film within the cassette. A contact element is held, prior to processing, against a spring force into a first position wherein it will be engaged by a pair of contacts in the other apparatus when inserted therein. The element is held in this unprocessed position by a slidable element, which element is displaced responsive to film advancement following processing. Such movement of the slidable element permits the biasing force to displace the contact element to a second position wherein it will not be engaged by the contact of the other apparatus, thus signaling the presence of a processed cassette.

Abstract: A portable microfilm viewer for viewing a microfilm contained in a cassette. The viewer includes a housing with a lens system mounted therein. The cassette is removably received on a film transport mechanism which both supports and drives the film. A source of rotary motion is fixedly mounted on the housing and a bidirectional engaging device couples the rotary output to the film transport means for selectively transporting the film of the cassette in either of two directions across the lens system. The source of rotary motion can be a manual wheel or a motor device. A counter can be included for determining the film frame being viewed and for setting a desired film frame to be viewed, whereby the device will automatically stop when the desired film frame is in view. In an embodiment of the invention the microfilm viewer can also accommodate microfiche cards which can be viewed through the same lens system.

Abstract: An audio-visual cassette system is provided employing a photographic film strip and an audio tape interwound on a common supply spool and adapted to be advanced along different paths from the supply spool to a takeup spool. The cassette is of the type in which the film strip may be exposed, processed and projected for viewing without removal from the cassette. The film strip is provided with an aperture in the supply spool leader which cooperates with a processor actuating pull strip to initiate processing of the film upon film advancement. The audio tape is coupled to the film strip at the supply spool end at a location with respect to the aperture such that the film strip pulls the tape away from the aperture region of the film during engagement of the pull strip with the aperture.

Abstract: A multipurpose film handling cassette of the type in which a photographic film strip is exposed, processed and projected without removal of the film from the cassette is provided with a one-piece indicating element for signaling to the apparatus with which it is to be used the unprocessed or processed condition of the film within the cassette. A contact element is mounted within the cassette for rotation about a fixed axis from a first position wherein it will operatively engage a signal generating terminal of the apparatus thereby indicating a given process condition of the film within the cassette, to a second position wherein it will not operatively engage the signal generating terminal of the other apparatus thereby indicating a different process condition of the film in the cassette.

Abstract: An emulsion stripping apparatus for removing spent layers of photographic materials from a film strip connected permanently at opposite ends to supply and take-up spools rotatable within a multi-purpose cassette in which the film strip is contained without removal during exposure, processing and projection. A stripping web of the same width as the film strip is connected releasably at one end on the supply spool and extends to the take-up spool but is not physically connected to the take-up spool. When a processing operation occurs in which the film strip is coated with processing fluid and rewound on the supply spool, the stripping web becomes interwound with the processed film strip. At the end of such processing rewind, the end of the stripping web initially extending to the take-up spool now extends in a general tangential direction from the periphery of the filled supply spool.

Abstract: A processor usable in a photographic film cassette, which includes a first chamber from which processing fluid is released to a second chamber for eventual flow through a nozzle opening onto a film strip whenever the cassette is in a processing orientation permitting gravity flow through the nozzle opening. An actuator device extends from the processor interior to its exterior through a passage for releasing the stored fluid from the first to the second chamber and a plurality of capillary grooves are formed in the processor in a region at least in or adjacent said passage to trap therein, by capillary adhesion, preselected quantities of any processing fluid residue.

Abstract: Method and fluid applicator apparatus usable in a photographic film cassette and including a pressure pad having a film engaging surface for slidably supporting successive incremental portions of a strip of photographic film in a given plane as the film strip progressively advances in a given direction across a nozzle opening through which processing fluid is deposited on the film's emulsion surface having a particle engaging surface depending from the film engaging surface and facing in a direction opposite to the direction to divert particles impinging thereagainst in a manner and direction so that they are prevented from being caught by the particle engaging surface of the pressure pad.

Abstract: Method and apparatus for releasing processing fluid from a fluid applicator within a film cassette by causing a sealed area of the applicator to open in response to a predetermined amount of thermal energy being applied thereto. Such applicator has a sealing device which device is responsive to the application of the predetermined thermal energy to open and release the fluid. A mechanism, for actuating the sealing device, is provided for facilitating application of such energy to the applicator.

Abstract: Film cartridge for use in viewing motion picture film having means forming a framework with an index plate with an aperture therein. A continuous length of film having perforations along one edge thereof is carried by the framework. Guide means is provided on the framework for guiding the film over the index plate and past the aperture. Means is provided for advancing the film frame by frame past the aperture. A spool is rotatably mounted on the framework. The spool has a central hub and a film supporting surface extending radially from the hub so that the hub extends away from the surface in a direction generally perpendicular to the surface. The spool has an annular rim spaced from the hub and extending away from the surface and in the same direction as the hub.

Abstract: A film strip carried in a multipurpose film cassette is provided with a conformation thereon which cooperates with structure carried by a processor disabling valve which may be slidably advanced, when engaged by the conformation, upon film advancement. The conformation comprises an aperture provided in the central region of the film strip which is adapted to engage a film strip engaging finger provided on the slide valve. The film strip engaging finger is disposed in a region between a pair of spaced film guiding fingers which engage only the outermost edges of the film strip. The spaced film guiding fingers and other structure in the cassette cooperate to guide the film strip in a curved S-shaped path during normal film advancement thereby. The film strip is further provided with a pair of elongated longitudinally extending slots on opposing sides of the centrally disposed slide valve engaging aperture.

Abstract: A photographic film cassette including a drive transmission arrangement configured for operating a film capstan and for selectively driving supply and take-up reels of the cassette responsive to projector driving operation. The cassette is a large capacity film cassette for use with automatic projector apparatus of the type having a cassette-receiving well smaller than the space occupied by take-up and supply reels of the large capacity cassette and is provided with a tongue-like housing portion receivable in the cassette well of the projection apparatus. Contained within the cassette is reversible drive transmission by which drive spindles in the cassette well are coupled to both an isolating capstan and the film reels to effect advancing movement of the film strip from the supply reel to the take-up reel during projection and rewinding movement of the film strip back to the supply reel after projection.