Abstract: A slide projector which is adapted for the use of circular trays (10, 12) having different numbers of slide compartments and which includes a pulse-controlled electronic switch unit for controlling a transport motor selectively moving one of the trays (10, 12) forwardly or backwardly comprises a slider (30) for fixing the trays (10, 12) in position, which slider can be actuated by the electronic switch unit following each indexing of the tray and which can be brought into engagement with both transport pins (15) associated with the compartments of the first circular tray (10) and serving as transport and fixing means and with a toothing (17) associated with the compartments of the second circular tray (12) and serving as transport and fixing means, following each indexing of the tray such engagement being achieved by fixing means (34, 35) associated with the transport and fixing means (15, 17) of the trays and adapted to the shape and size thereof.

Abstract: A photographic processing apparatus for processing a photosensitive material with a processing solution including first and second processing ingredients includes a processing tank for holding the processing solution and for processing the photosensitive material. The used processing solution is discharged from the processing tank into a separator where the second processing ingredient is removed from the processing solution leaving the first processing solution. The first processing solution is circulated back to the processing tank.

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: The invention relates to an overhead projector for projecting images, said projector including a liquid crystal display panel arranged in the imaging plane, an optical imaging unit and a lamp and reflector arrangement accommodated in a housing as well as a scanning means for stored data. Adjacent to the platen (18) covering the liquid crystal display panel (17), a data strip scanning means (20) is provided which is accessible from outside. A transparency (23) which shows pictures, diagrams or the like and can be placed on platen (18) comprises a data strip (25) for selective and/or joint projection with the liquid crystal images, said data strip extending into the area of the scanning means (20) when the transparency (23) is placed on platen (18).

Abstract: A module interposed between a slide tray and a projector provides a user selected random presentation of sequentially ordered slides. The module bottom simulates the tray bottom to align gates of the module and projector. The module top simulates the tray bottom to align gates of the tray and module. A microcontroller controls a lifter foot to keep unwanted slides from dropping into the module gate until the tray had been rotated by a hub assembly to the next desired slide position. The lifter foot then acts to lower a slide through the module to the lifter foot and projector, and return it after projection.

Abstract: A photographic film is transported by a pair of endless belts past an exposure aperture and a pair of magnetic heads. The heads are mounted in a film platen in alignment with the belts so that the belts provide backup support to the film during recording and/or reading information on the film.

Abstract: A magnetic head suspension system for use in a photofinishing operation comprises a fixed support and a pair of magentic head suspension assemblies each rotatably mounted on the support. The magnetic head suspension assemblies are biased towards each other to engage opposite edges of the film respectively. Each magnetic head suspension assembly is rotatable relative to the fixed support to compensate for film width variations and film edge irregularities to insure constant orientation of the magnetic heads with respect to the film edges.

Abstract: A head suspension system for use in a photofinishing operation comprises a movable support mounted for movement through an arc having a predetermined radius and a pair of magnetic head suspension assemblies each rotatably mounted on the movable support. The suspension assemblies are biased towards each other to cause surfaces of the magnetic head assemblies to engage opposite edges of a photographic film respectively. The entire system including the movable support is movable through an arc to adjust for angular variations of the film while each head suspension assembly is rotatable relative to the movable support to compensate for film width variations and film edge irregularities to insure constant orientation of the magnetic heads with respect to the film edges.

Abstract: In a final phase of the photographic process a customer generally receives an envelope containing a group of prints and a plurality of strips of negatives associated with the prints. Packaging the prints and negatives in this manner can lead to the negatives getting demand and/or the negatives getting separated from the original prints, thus making it difficult to produce high quailty reprints and making it difficult to determine which negative is to be reprinted. A photographic image set including an index print integrally stored with the associated negative strips provides a convenient single storage and retrieval system. A method of making the photographic image set provides acceptable overall exposure of the index print and reduces the incidence of damage to the negative strips.

Abstract: A photographic still camera includes a magnetic head for recording information on a magnetic surface of photographic film. The head is supported on a carriage which is mounted on a film platen for movement relative to the platen perpendicular to the longitudinal axis of the film. A spring mounted on the carriage is provided with spring arms that bias the carriage toward the longitudinal axis of the film so that a pair of pins extending from the carriage engage an edge of the film to maintain a precise relationship between the recorded information track and the film edge. A pressure pad carried by another arm of the spring urges the film into contact with the head. The platen carriage, head, spring and pressure head form a modular assembly which can be conveniently mounted into a photographic still camera.