Abstract: An original feeding device for feeding OHP originals to the display stage of an overhead projector is capable of transportation control suitable for OHP projection. The originals are transported by a conveying film onto the display stage. In order to stop the original at the center of the display stage, after the original is detected by the registration sensor, the conveying film is advanced by an amount equal to the sum of the distance from the registration sensor to the display stage, a half of the length of the display stage and a half of the length of the original.

Abstract: A slide projector having a chute (37) for feeding slides (21, 24) to be projected to a projection gate and also having a stack loader (9) with a first and a second storage chamber (17 and 19), each to take a stack of slides which are in contact with one another. The stack loader (9) has a movable receiving member (31) with two slide compartments (35 and 36), wherein the receiving member serves as a movable intermediate tray whose slide compartments can be selectively aligned with the opening of the chute (37) and can be selectively loaded and unloaded again with an end slide (21, 24) of the stack of slides in one of the storage chambers (17 or 19) by a series of friction wheels (47, 49, 61, 63).

Abstract: A manually-operated tray assembly for facilitating the handling of transparencies on an overhead projector. The tray assembly comprises a dispensing tray for holding a stack of transparencies prior to projection, and a receiving tray for accepting the transparencies following projection. The transparencies are slid one-at-a-time from the dispensing tray to the platen of the projector, and following projection, from the platen to the receiving tray by a stroke of the user's hand. The `used` transparencies accumulate in the receiving tray in a neat orderly stack. The dispensing tray is preferably arranged at a sloping angle relative to the platen of the projector so that only one transparency at a time is transferred to the platen. The receiving tray is also preferably arranged at a sloping angle relative to the platen to facilitate the transfer of transparencies from the platen to the receiving tray.

Abstract: The system comprises a hopper attached below a table for holding two stacks of the slide mounts. A pick-off station removes the slide mounts from the slide mount stack. The slide mount is moved to a slide mounting station and then sealed underneath a ultrasonic welding head. The hopper includes a carousel that rotates either stack into a predetermined position underneath the pick-off station. The motorized hopper used in conjunction with the pick-off mechanism and hold-down apparatus eliminate the previous problems associated with slide mount jamming. The ultrasonic welding head vibrates the top half of the slide mount creating a friction between the internal faces of the top and bottom halves of the slide mount. This friction heats adhesive inside the slide mount sealing the top and bottom halves of the slide mount together.

Abstract: An original conveying apparatus includes an original stacker, a separator for separating the stacked originals from an upper side and for supplying the separated originals, a conveyor for conveying the separated originals to pass them through a reading portion and holding the originals in page sequence, a driver for rotating the conveyor normally or reversely, a discharger for returning the original to the original stacker and a controller for controlling the driver, the discharger and the separator so that an original is selected and set on the reading portion.

Abstract: A system for the display of transparencies including a first transparency receiving tray, a second transparency receiving tray, and a staging system connected at one end to the first transparency receiving tray and at the other end to the second transparency receiving tray. This staging system includes a transfer belt extending across a staging area so as to move a transparency across the staging area, a motor drivingly connected to the transfer belt so as to selectively rotate the transfer belt in various directions, and an actuating guide positioned adjacent to the first transparency receiving tray so as to direct the transparency from the first tray to the transfer belt. A controller is connected to the motor so as to actuate the motor for moving a transparency across the staging area in a desired direction. A lift plate is mounted in the receiving trays so as to support a plurality of transparencies thereon.

Abstract: A system for facilitating the handling of overhead projector transparencies on an overhead projector of the type including an upwardly facing projector platen. The system includes a frame assembly to provide a support surface adjacent the projector platen. A transparency storage cassette is supported on the support surface in alignment with the projector platen and generally includes a housing defining a closed chamber. An upwardly biased follower plate is mounted within the chamber to support a stack of transparencies. An access door allows loading of the transparencies into the chamber. Between the door and the follower plate is a cam arrangement to move the follower plate downwardly against the bias when the door is moved to an open position to thereby facilitate the loading of the transparencies into the chamber.

Abstract: A system for facilitating the handling of overhead projector transparencies on an overhead projector of the type including an upwardly facing projector platen. The system includes a frame assembly to provide a support surface adjacent the projector platen. A transparency storage cassette is supported on the support surface in alignment with the projector platen and generally includes a housing defining a closed chamber. An upwardly biased follower plate is mounted within the chamber to support a stack of transparencies. A door allows loading of the transparencies into the chamber. Between the door and the follower plate is a cam arrangement to move the follower plate downwardly against the bias when the door is moved to an open position to thereby facilitate the loading of the transparencies into the chamber.

Abstract: A transparency changer attachment for an overhead projector includes hinged horizontal and vertical portions that are located over the projector cover glass and down the projector side, respectively. Transparencies are automatically sequentially fed by pick and retard rollers from a single cassette-loaded transparency stack in the vertical portion to belts and rollers located marginally of a viewing area defined in the horizontal portion, to bring them into registration with the cover glass for projection, and then return them to the single stack. A microprocessor circuit controls the stack side from which the next transparency is picked and to which it is returned, according to selection made by the user. The cassette is keyed to assure correct transparency orientation at loading. A sensor reads individual transparency identifying information to initiate rapid cycling to a particular next desired transparency.

Abstract: A lamina retrieval device for storing microfiche, holograms and other flat, sheet-like materials. A stack of laminae are retained in a cage formed by a plurality of guides, with the guides being so mounted as to retain the laminae in an angularly displaced disposition, with each lamina in a group of laminae being angled with respect to an adjacent lamina. To allow for the removal of a lamina, the guides may be formed as split pins so that part of each pin is movable to form an opening in the cage. The device can include fingers for holding a stack of laminae apart to allow removal of the desired lamina. Removal is accomplished in one embodiment through an airflow.

Abstract: The invention relates to a slide magazine with housing, open at the top, a slide projector with a picture-changing device having a horizontally actuated slide pusher. The housing, which can be mounted immovably in the projector, has, approximately in the longitudinal center of a longitudinal wall, an opening for a slide, opposite which there is a deflector with a deflecting surface, which runs at an angle to the longitudinal center plane of the housing. In the area of the deflector, a transporting lever, which can be moved transversely to the longitudinal center plane from a resting position to a working position, and which has a working surface that works together with the slide pusher, is mounted especially so that it can be swivelled. With the transporting lever in the resting position, the working surface protrudes into the path of the slide pusher. However, when the transporting lever is in the working position, the working surface is arranged outside of this path.

Abstract: The automatic distributor comprises a loader (2) in which slides (3) are stacked and a separation mechanism (10) intended to isolate the lowest slide (3a) of the stack. It comprises, for this purpose, support elements consisting of claws (12) and locking elements in the form of pins (11) that work with the edge of the lower bottom slides. A motor (21) drives cams (19) intended to control the movement of the claws (12) and of the pins (11) urged by a spring (29). An optoelectronic device (36) makes it possible to detect the drop of a slide (3a) and to reverse the direction of rotation of the motor (21). Following a slide advance order, the motor (21) drives the cams (19) which allow the unit of the pins (11) to press against the edge of the lowest slides. The claws (12) are withdrawn and then gradually the pins (11) are withdrawn. As soon as the lowest slide (3 a) falls, it activates the optoelectronic device (36) which reverses the direction of the motor (21).

Abstract: Apparatus (36, 37 and 38) adapted for association with a projector (11) and a compartmented magazine (12) for containing photographic slides for said projector whereby a stack of slides (42) contained in said apparatus are loaded into said magazine utilizing the slide removing (32, 33) and magazine advancement (29) mechanisms contained within the projector.

Abstract: A series of slides are placed in a vertical loader and are movable alternatively into respective ones of two projection positions. Each slide is moved laterally of the loader by a carriage, then pushed to the projection position by a push rod. During projection the following slide in the loader is similarly moved to the other projection position. After its projection, the first slide is brought back by a further push rod to its carriage and then is moved by the carriage to be deposited in a receptacle and be replaced by a new slide which will be moved into the same projection position.

Abstract: A cassette, cartridge, box or magazine for storing and projecting transparencies or slides as well as a viewer or projector, the cassette and the viewer or projector matching each other. Said cassette having two compartments for stacks of slides and a structure connecting said compartments and being provided with a passage for moving the slides one by one from the bottom of one compartment to the other compartment and preferably from the top of the last named compartment to the first named compartment through a second passage. The connecting structure being adapted for attachment to a projector or viewer with a slide in said passage being arranged between a light source and a focussing lens. The viewer or projector being provided with means for pushing the slides one by one from one compartment through the passage into the other compartment.

Abstract: A device for displaying photo-slides having a panel with a light source behind it and several sets of parallel rails to support photographic slides for viewing. Each set of rails has an upper and lower rail that are spaced to support the top and bottom of the back surface of the photo-slides, and on the upper rail there is a series of pick off teeth with a stop surface protruding above the rail at a height slightly less than the thickness of a photo-slide. A slide handler box receives a stack of photo-slides and slides along, astride the upper and lower rails so that as the stack engages a pick-off tooth, a single photo-slide is engaged, stripped away, and stopped in place on the rail. The back of the handler box has an opening at the bottom just wide enough to allow one photo-slide to pass.

Abstract: Apparatus having a chamber for receiving a stack of photographs which are to be sequentially moved into a projection plane whereat their images may be projected onto a viewing screen. One wall of the chamber includes a shelf which is adapted to support one end of the stack of photographs such that, upon initial loading of the stack of photographs into the chamber, the endmost photograph located closest to the projection plane is prevented from falling completely into the projection plane. The apparatus includes an indexing member which is movable into and out of engagement with the one end of the endmost photograph so as to push it off of the shelf thereby enabling it to move substantially fully into the projection plane wherein it defines an acute angle with the next adjacent photograph which is now being supported at one end by the shelf. The relationship of these two photographs is now such that only their ends, i.e.

Abstract: A photographic slide magazine is placed on a hub and rotates around its axis while the compartments containing slides pass over an opening through which the slides drop into a receiver. After unloading previously stored slides each compartment passes under a loading mechanism, which drops another slide into each of the emptied compartments. Loading and unloading operations are concurrent. A storage magazine with a clamping mechanism is used to pick-up the unloaded slides and to place slides in the loading mechanism.

Abstract: A slide projector having a supply station to accept slides from a vertical stack in a supply means, the projector having a slide separator device enabling single slide feed in a horizontal plane from an intermixed stack of thick and thin slides in the supply means.