Abstract: An arrangement for driving at least one roller of a roller unit for transporting web-shaped materials, such as X-ray sheet films or stimulatable phosphorous foils with substantially constant speed in a device for exposing or scanning these materials, the arrangement comprising a stepping motor having a motor output shaft, a friction drive having a drive input shaft, and a vibration damping mechanism provided between said motor output shaft and the drive input shaft. The drive is formed so that a ratio of the drive and a diameter of the roller is selected so that at least 20 steps of the stepping motor corresponds to a transporting path of the web-shaped material of one millimeter.

Abstract: An arrangement for turning an image projected on an image screen has an image screen, a trapezoidal prism for image turning, and an optical system for image producing. The prism has an entry surface, a base surface and an exit surface. The entry surface of the prism encloses with the base surface an angle which is different from an angle enclosed by the exit surface of the base surface. A light beam extending on an optical axis of the optical system for image producing is offset on the exit surface relative to the optical axis and encloses an angle with the optical axis which is not equal to zero, and a transmission filter is located between the prism and the image screen.

Abstract: An apparatus for developing photosensitive material has a processing bath, and transporting devices for advancing several strips and/or sheets of photosensitive material through the bath side-by-side. The strips and sheets have various widths. A sensing system is provided to sense the surface area of the material advanced through the bath. The sensing system includes a plurality of spaced sensors arranged in a row which traverses the path of the material. The sensors are designed to sense the widths of the strips and/or sheets, and adjacent ones of the sensors are spaced from one another by a distance smaller than the magnitude of the smallest difference between the widths of the strips and/or sheets. The lengths of the strips and/or sheets are taken into account by a length measuring unit which determines the frequency with which the sensors scan the strips and/or sheets.

Abstract: The length of film frames on successive roll films which form an elongated strip of randomly alternating roll films with shorter and longer film frames is ascertained by advancing the strip stepwise past a photoelectronic monitoring device which generates signals denoting the light transmissivity of successive increments of the strip. Signals denoting the leaders of successive film frames are stored in a sample-and-hold circuit which replaces the stored signals with signals of greater intensity when the signals of greater intensity are generated during transport of a length of strip corresponding to the length of a longer film frame. This denotes that the corresponding roll film contains shorter film frames.

Abstract: Colored dye diffusion images are produced using a recording material containing, on a layer support (layer element 1), a first dye absorbent layer (layer element 2), a light-sensitive element containing silver halide emulsion layers and color-providing compounds (layer element 3) and optionally a second dye absorbent layer (layer element 4), in that order. An imagewise distribution of diffusible dyes is produced in the light-sensitive element in the course of development and transferred to the first dye absorbent layer.The light-sensitive element is then decomposed by a treatment which decomposes its layers, e.g. by means of a proteolytic enzyme, but leaves the first dye absorbent layer intact. The second dye absorbent layer optionally present, which has a lower mordanting capacity than the first dye absorbent layer and serves to prevent contamination of the developer bath with diffusible dyes, is also decomposed.

Abstract: Light is directed from a source through a developed and travelling motion-picture film, to pass through a reproduction lens. This light is intercepted by a tilting mirror which reflects it back through the lens where it is intercepted by a stationary mirror and reflected onto an opto-electronic receiver for conversion into signals which permit showing of the film images on a television screen.

Abstract: An apparatus for exposing and developing film units which have pairs of overlapping positive and negative sheets and must be subjected to a diffusion treatment subsequent to treatment with a liquid developing agent has an exposing unit above a light duct which is disposed above a compartment for cassettes containing stacks of superimposed film units. The compartment is located above a diffusion chamber and is adjacent to a relatively small casing for a developing unit containing a liquid developing agent and provided with pairs of advancing rolls for the transport of freshly exposed film units from the cassette in the compartment, through the casing and the developing agent therein, and thereupon into the diffusion chamber. The developing unit has a device which temporarily separates the sheets of a film unit during transport through the developing agent.

Abstract: An arrangement for transporting strip-shaped material, particularly photographic paper, includes a one-piece elongated holding element which extends along a triple-turn hairpin course to form four holding sections which are substantially parallel to one another and define with each other three spaces for strip-shaped material. Two brackets which are welded to the end portions of the two outer sections of the holding element and are bent at right angle to the remainder of the respective outer sections support the holding element on a conveyor belt for travel therewith. The four sections of the holding element resiliently contact one another to clamp the strip-shaped material therebetween when such strip-shaped material is received between neighboring sections.

Abstract: A method of determining the amounts of light in the basic colors to which an original is to be exposed during a color copying operation to obtain a copy the colors of which are matched in dependence on the image recorded on the original includes the establishment of color density difference functional correlations from values denoting the results of measurements at a multitude of regions of the film strip which includes the original in question. The correlations can then be used for determining the light amounts for most of the originals. Furthermore, the originals are evaluated for discrimination between daylight and artificial light exposures as well as for recognition of originals including color dominants and, in the latter instance, also for ascertaining whether the color dominant was caused by image-important features.

Abstract: A homo- or copolymer containing copolymerized monomeric units of the formula ##STR1## is a valuable peptizing agent for the precipitation of silver halide. Sensitivity, onset of development and silver covering power are advantageously influenced.

Abstract: The invention relates to an experimental plant for the coating and drying of material in the form of webs with viscous liquids. The flat loop of web including its guide elements is displaced over one or more fixed casting apparatus and coupled so that the web including the casting apparatus during coating is mounted to be free from vibrations.

Abstract: Propyne compounds, which are capable of stabilizing photographic materials against fog, color fog and flattening of the gradation are disclosed. They may be added to emulsion layers and to processing baths.

Abstract: Apparatus for classifying photographic prints which are severed from the leader of a downwardly moving web of exposed and developed photographic paper has side walls which define a downwardly extending channel whose upper end constitutes an inlet for descending prints and whose lower end has two or more discrete outlets. The channel contains one or more blade-like switching members which are movable between several positions to thereby establish paths for descent of sheets from the inlet into a selected outlet. The switching member or members are movable between such positions by electromagnets which are installed externally of the channel and each of which can attract or release one or more swtiching members. The channel can be mounted on a pivotable carrier which can move at least one outlet between two different positions for admission of prints which descend through such outlet into either of two discrete receptacles.

Abstract: A photosensitive recording material containing at least one silver halide layer and an azo dye is disclosed.

Abstract: The invention relates to a method of contact-free, almost continuous measurement and monitoring of the width, thickness and position of magnetic tracks on moving film strips within wide limits of the speed. The track width and track position of the magnetic tracks are measured optically and the magnetically acting track cross section is measured electromagnetically via the track volume. The measured values are together recorded, evaluated and displayed and/or used for recontrolling the casting arrangement for emitting warning signals or for stopping the coating machine.

Abstract: A color photographic material is provided in which the interimage effect is adjusted to provide optimum color reproduction. The photographic material comprises an emulsion referred to as type I emulsion, which releases an inhibitor on development and another emulsion with underripened grains which are more soluble than those of the type I emulsion.

Abstract: The exposed and developed frames of a color film are copied on the basis of information which is obtained by scanning the density of each frame in primary colors as well as on the basis of information which is obtained by imaging a series of gray filters having different densities onto one or more portions of the film outside of the film frames and scanning the density of the image of each filter. The information which is obtained as a result of such scanning is processed by a computer or an amplifier which controls the quantity of copying light in each of the primary colors, either by selecting the interval of exposure of each frame to light in each of the primary colors by controlling the intensity of light in each of the primary colors (if the exposure times in each of the primary colors are identical). The filters can be imaged prior to exposure of frames to scene light and/or shortly prior to development of the film in a processing laboratory.

Abstract: The condensation of an .alpha.-halogen carbonyl compound with carbamic acid esters in the presence of a basic condensing agent and an aprotic solvent enables the production of oxazolinone-2-compounds in a high degree of purity, and in high yields in one step by using simple and readily available starting compounds.

Abstract: A first pulse train whose pulse repetition frequency varies in dependence upon scene light, and a second pulse train whose pulse repetition frequency does not vary in dependence upon scene light, are counted by digital counting circuitry, and a terminate-exposure signal is produced when the digital counting circuitry reaches a predetermined count. The second pulse train serves to establish an upper permissible limit for the duration of the exposure to be performed.

Abstract: Recording medium for photographic prints comprising a magnetizable layer on the rear side of a photographic material which is preferrably paper based, the magnetizable areas having different surface roughnesses. This medium allows recording of sound information or codes on the prints and reproduction in recorders or by monitoring.