Abstract: A signal-processing device for transforming a digital image signal, that has been obtained by sampling and digitization of a video signal obtained by line-wise scanning of an original, to a binary image signal wherein zero points of the two-dimensional second difference of the digital video signal are determined in order to detect contrast transitions in the original. Unwanted noise components in the video signal are eliminated by masking the second-difference signal.

Abstract: A color photographic recording material contains at least one silver halide emulsion layer which is divided into a partial layers of different sensitivity, at least one relatively high-sensitivity partial layer containing a synthetic polymer and gelatin in a ratio by weight of from 30:70 to 80:20.

Abstract: Method of making images by image-wise exposing a silver halide emulsion layer, developing it with an alkaline processing solution in the presence of a silver halide solvent and causing silver complexes to diffuse from the emulsion layer into a non-light-sensitive image-receiving layer in the presence of development nuclei thereby to form a silver transfer image in that layer, said transfer image formation occurring in the presence of at least one heterocyclic azole compound, which influences the density and tone of said transfer image, said compound being contained in said image-receiving layer and/or in said processing solution and being a heterocyclic azole corresponding to the general formula: ##STR1## wherein Y is .dbd.N-- or .dbd.HC--; Z represents atoms completing a heterocycle; A is a chemical bond or the group --(L.sup.1).sub.n --Alk--(L.sup.2).sub.m -- wherein n is 0 or 1, L.sup.

Abstract: A transport roller made of plastics by extrusion and used for photomechanical apparatus for transporting film or X-ray cassettes or the like is formed as a sleeve having an internal recess, the surface of which is provided with a plurality of inwardly radially protruding ribs which ensure a stable and rigid structure of the roller without requiring a metallic core in the roller.

Abstract: Improved electrostatographic suspension developers contain a pigment coated with polycyanoacrylate.Wherein the polycyanoacrylate comprises an inner shell on a pigment dispersed in an electrically insulating carrier liquid having a volume resistance of at least 10.sup.9 ohm.cm and a dielectric constant below 3 and the pigment has an additional shell of a copolymer ofA. cationic monomers which contain ammonium, phosphonium or sulfonium groups and of which the anions are derived from CH-acid compounds containing at least one C.sub.6 -C.sub.24 hydrocarbon radical andB. radically polymerizable olefinically unsaturated compounds as comonomers.

Abstract: A photographic film storage and dispensing package, which comprises an elongated light-tight box (10), a core (19) that is rotatably journalled between flanges (14) in the box, a web (22) of light-impervious paper that is wound onto said core and a plurality of undeveloped sheets (23) of light-sensitive photographic material that are interwound in closely spaced apart succession together with said web onto the core. The box has an openable cover on one side parallel to the core axis which when opened permits the web to be unwound and the individual sheets delivered one by one out of the box.

Abstract: Polymer latices in which the dispersed particles consist of a soft core and a hard shell are suitable plasticizers for gelatine in photographic recording materials.

Abstract: A locking plate for front panels of magnetic tape cassettes, particularly video tape cassettes, which has a hinged bearing and contains a spring which exerts a torque in a direction towards the barred position, whereby the plate spring is injected on the journal bearing of the locking panel pointing inside the casette and is U-shaped and that its free end touches the wall of the cassette housing.

Abstract: A vacuum contact exposure device for exposing a light-sensitive sheet to another sheet, which comprises a housing with a hinged top cover, a contact exposure space formed between a glass plate and a flexible blanket inside said housing, and means for creating an underpressure in the housing, wherein in succession the housing and the contact exposure space are evacuated, the exposure space is closed, the atmospheric pressure is restored in the housing while the exposure space remains evacuated, and the lid is opened and the exposure carried out.

Abstract: Process for forming a halftone multicolor pattern which comprises in sequence given the following steps:(1) scanningwise exposing a multicolor original attached to a rotating scanner drum to produce series of electrical signals that are fed into a computer,(2) exposing in a single scan separate black-and-white light-sensitive silver halide emulsion layer materials under the control of the computer in accordance with said signals,(3) developing the exposed silver halide emulsion layers with a hardening or tanning developing agent producing a negative or positive silver selection image that can be used as intermediate original in the production of a printing plate, a pattern of oxidized hardening developing agent being imagewise transferred during development from the emulsion layer onto a hardenable non-photosensitive colored gelatin layer originally carried on a temporary support or carried directly on a permanent support,(4) producing a colored relief image by wash-off processing of said colored gelating lay

Abstract: A high contrast silver metal image can be formed in an exposed photographic silver halide emulsion layer material, the silver halide of which is at least 90 mole percent silver bromide, with the balance being silver chloride and/or silver iodide by developing the same in a developing medium in the presence of hydroquinone as sole developing agent, a large amount of sulphite derived from an inorganic sulphite compound, a nitro-indazole anti-fogging agent, and a polyoxyethylene polymer, and an inorganic alkaline compound to impart to the medium a pH of at least 10.5 provided the amounts of these ingredients meets certain requirements.

Abstract: An arrangement for the wet processing of photographic materials includes a container for a processing bath. A rack for transporting the materials through the bath is removably mountable in the container. The container has a longitudinally extending bottom wall as well as a pair of longitudinally extending side walls, and these walls are constituted by a one piece extrusion consisting of a synthetic resin. The extrusion is shaped to match the outline of the rack. The container further has a pair of injection molded end walls which likewise consist of a synthetic resin. The end walls are fused to the respective ends of the extrusion. The rack is divided into two sections to facilitate introduction of the rack into, and removal of the rack from, the container.

Abstract: Apparatus for processing sheet material according to the DTR process, with two liquid applicator rollers (17,18) that are arranged for wetting one side only of each sheet, and with a liquid transfer roller (16) that is arranged for rotation in a tray (14) with processing liquid (15), said rollers being mounted in such a way that there are maintained beads (20,21,22) of processing liquid between either pair of these three rollers, in operation of the apparatus.

Abstract: Improved silver halide emulsions are obtained by the combined use of an iridium compound and an imidazole before termination of crystal growth.

Abstract: A strip of originals is copied onto a band of copy material at high speed using a highly automated copier which measures the densities of the originals in the primary colors and calculates exposures from the densities. The calculated exposures for each original in each primary color are recorded. The band of exposed copy material is developed and the copies are evaluated. Unsatisfactory copies are marked. The band of copy material is subsequently cut into individual copies and the unsatisfactory copies, as well as the corresponding originals, are collected. These originals are recopied in a second copier which is far less sophisticated and expensive than the first copier. The exposures used to recopy an original are derived by applying correction factors to the recorded exposures for the original. By performing the recopying procedures, which are rather slow because they require manual operations, in a second copier, the output of the high speed copier can be maintained.

Abstract: Process for forming a halftone or multicolor colloid pattern by the following steps in sequence:(1) scanningwise exposing to light a multicolor original carried, e.g., by a rotating scanner drum, to obtain separate red light, green light and blue light, out signals which are received by corresponding photon-conductors to produce corresponding separate series of electrical signals, which are, e.g.

Abstract: The method comprises the production of a live-action film of subjects acting against a white background, making black-and-white subjects enlargements with grey gradation of useful film frames, drawing separate contour images from these enlargements, painting transparent cells from the contour images, and using each subject enlargement in superposition with the corresponding painted cells for exposure with a background image, in an animation camera.

Abstract: A device for wet porocessing of photographic films comprises a film processing device and a storage container for storing a processing liquid supplied to the film processing device. The film processing device has a housing which is formed as a container in which a bath of the processing liquid is located and through which a film base is guided by means of rotary inlet rollers, rinsing rollers and squeezing rollers. The pair of rinsing rollers are each positioned in a cage which is extended to form a liquid-distributing channel connected to a respective feeding conduit leading from the storage container. A conduit system for continually renewing the processing liquid in the device is provided.

Abstract: A color photographic recording material developable by heat treatment and comprising at least one binder layer, which contains photosensitive silver halide, optionally a substantially non-photosensitive silver salt and a color providing compound (dye releaser), can be improved in regard to the Dmin/max relation and in regard to sensitivity by addition of a compound corresponding to formula IR.sup.1 --S--CO--O--R.sup.2in which R.sup.1 and R.sup.2 independently of one another represent alkyl, alkenyl, cycloalkyl, aralkyl or aryl.

Abstract: This invention relates to a magnetic recording carrier in which the magnetic layer and/or the backing layer contains, in addition to the usual additives, radiation hardenable dispersing agents based on ethylenically unsaturated phosphoric acid ester mixtures capable of forming bataine type stuctures and consisting of reaction products of (A) an acrylic acid ester and/or oligo acrylate containing 1 OH group per molecule, (B) a tertiary alkylamine containing 1 OH group per molecule and (C) phosphorus pentoxide, the reaction products having acid numbers below 200.