Abstract: An optical system for an electrophotographic film camera/reader-verifier. The image is transmitted downwardly to a first mirror (28) fixed at an angle of approximately 45.degree. with respect to either a horizontal or vertical plane. The image is, in turn, transmitted to a second mirror (32) fixedly disposed within a vertical plane, and a focusing lens (36) finally transmits the image to a film element for recording thereon. When an image frame of the film element is to be viewed, read, or verified, a projection lamp (40) is energized for illuminating the film element whereby the illuminated image thereof is transmitted to a third mirror (44), which is located at an inclined angle of approximately 15.degree. with respect to a horizontal plane. The mirror (44) in turn transmits the image of the film element to a front projection screen (46) which is also fixedly disposed at an angle of approximately 15.degree. with respect to a vertical plane.

Abstract: A toner flow control system for liquid toner within camera/processor apparatus includes the disposition of a development electrode portion (30, 130, 230) and the electrophotographic film element (14, 114, 214) within planes inclined with respect to a horizontal plane at an angle of between 30.degree. and 60.degree.. A toner flow channel (32, 132, 232) is defined between the development electrode and the film element wherein, as a result of the inclination of the channel, the flow of the liquid toner (36, 136, 236) is able to be controlled and uniformly distributed over the electrode and film element under the influence of gravity.

Abstract: The present invention is a diode bias toning system and method for use in and with electrophotographic copying machines and the like, and provides a significant improvement over "floating" and "hard-wired" toning systems to provide a user with the benefit of self-compensation or self-adjustment sensitometry, while allowing better control of large density percentage images and providing a simple and practical means and method which yield the satisfactory inherent results or advantages of a "hard-wired" system. The employment of a single diode means connected between a development electrode and a variable high-voltage D.C. power supply, so as to prevent the passage of current between the development electrode and the supply means, thereby facilitates the usage of a single high-voltage D.C. power supply to supply both the corona charging and toning biasing functions of an electrophotographic copying machine or system.

Abstract: A toner flow control system for liquid toner within camera/processor apparatus includes the disposition of a development electrode portion (30) and the electrophotographic film (14) within planes inclined with respect to a horizontal plane at an angle of between 30.degree. and 60.degree.. The film (14) and electrode (30) define a toner flow channel (32) therebetween which is also therefore inclined with respect to the horizontal plane at the same angle, whereby the flow of the liquid toner (36) through the channel (32) is able to be controlled and uniformly distributed over the electrode (30) and film (14). In addition, gravity discharge (46) of the toner (36) from the channel (32) is able to be accomplished without the need for special sealing devices to confine the toner within the toner cell. The controlled flow of the toner within the channel (32) eliminates the need for substantial negative pressure or vacuum suction systems normally employed in conjunction with vertically oriented toner channels.

Abstract: Apparatus for imaging and developing electrophotographic elements includes a single module (16) within which there is housed three processing stations (18, 20, 22) equidistantly spaced apart at distances corresponding to the distance separating the image frames of an electrophotographic element microformat. The first station (18) charges and exposes a first image frame of the element (12), the second station (20) tones and preliminarily dries the first image frame while a second image frame is located at the first station (18) for charging and exposure, and the third station (22) completes the drying and fuses the first image frame while the second image frame is now toned and partially dried, a new third image frame being presented to the first station (18) for charging and exposure. An intermittent film transport system, not shown, conveys the film element (12) in a unidirectional mode throughout the processing as indicated by the directional arrow (24).

Abstract: A desk-top camera/processor-reader apparatus for electrophotographic film includes a primary optical system of three fixed mirrors (24, 26, 28), and a pivotable mirror assembly (36) for defining optical paths between a copyboard station (12) and the microfilm (30) as well as between the microfilm (30) and a rear-projection screen (18). The pivotable mirror assembly (36) is movable between two extreme positions, the first position (36') being the camera/photographing mode, and the second position (36") being the reader/viewing mode. Camera/photographing and reader-projection lamps (42, 56) are provided for alternative energization and illumination of the copyboard station original documents and the microfilm (30).

Abstract: Camera for making slide transparencies on electrophotographic film which is carried during processing on one-half of a foldable, planar slide frame. The apparatus includes a reversible drive roll which automatically injects and ejects the frame carrying film for imaging and developing along the processing path of the camera. A corona unit for charging the photoconductive layer of the film is energized during inward movement of the film into the camera. After imaging by a light source, a liquid toner is activated for developing the image during withdrawal of the film along the processing path. The toner head includes spaced doctor blades for removal from the film of excess toner. The camera includes a fan which generates positive air pressure along the processing path during withdrawal of the film. Sensors are provided for processing elements including controlling an electric circuit for sequential operation of the drive roll, corona charging unit, toner pump and fan.

Abstract: An improved slide for electrophotographic film which comprises a pair of slide frame forming panels hingedly connected along adjacent edges enabling the panels to be folded together in superposed relation. The inner surfaces of each panel is coated with a pressure sensitive adhesive which bonds an electrophotographic film to one panel. A transparent protective film or a second photographic film may be bonded to the other panel. A conductive foil strip is affixed along an edge of the film for providing a grounding contact required for imaging the film in a duplicating camera and a release paper is disposed over the adhesive coating of the other panel. Subsequent to imaging, a slide is formed by stripping off the release paper and folding the panels so that the adhesive coating bonds the inner surfaces together with the film being retained therebetween.