Abstract: A new class of photographic masked stabilizers is disclosed showing following general chemical formula (Ia) or (Ib): ##STR1## wherein X and Y each independently represent N or CR, R being hydrogen or lower alkyl,Z represents a lower alkyl group, a nitro group, a halogen atom or hydrogen, andM represents a positive counterion, preferably an alkali cation, ammonium or substituted ammonium.The compounds are demasked by hydrolysis under alkaline conditions. They can be incorporated in a developing solution or in a photographic material, preferably in the backing layer. They show an enhanced solvability in water compared to the corresponding unmasked stabilizers.A preferred compound is 1-(2-sulphonatobenzoyl)-5-nitroindazole trimethylamine, sodium or potassium salt.

Abstract: Dye-donor element for use according to thermal dye sublimation transfer comprising a support having on one side a dye layer and on the other side a heat-resistant layer, characterized in that said heat-resistant layer comprises a polycarbonate derived from a bis-(hydroxyphenyl)-cycloalkane (diphenol) corresponding to formula (I) ##STR1## wherein: R.sup.1 and R.sup.2 (same or different) represent hydrogen, halogen, a C.sub.1 -C.sub.8 alkyl group, a C.sub.5 -C.sub.6 cycloalkyl group, a C.sub.6 -C.sub.10 aryl group or a C.sub.7 -C.sub.12 aralkyl group;X represents the necessary atoms to close a 5- to 8-membered cycloaliphatic ring which is substituted with one or more C.sub.1 -C.sub.6 alkyl groups or 5- or 6-membered cycloalkyl groups or carries fused-on 5- or 6-membered cycloalkyl groups.

Abstract: A housing for a light emitting diode recording head used for linewise recording information on a photoreceptor in a recording apparatus is constituted by elongated extrusion molded base and cover sections held together in a unitary structure by injection molded and closure members. The cover section has opposed inclined side walls engaged at their diverging margins on the base section and defining at their converging margins an elongated slot for receiving the lens array of the head. Preferably, the cover section is formed of two identical subsections with their converging margins held apart by an inner leg on each end member to define said slot. The end members and/or the ends of the base section can carry projections to facilitate accurate mounting of the head in the apparatus. The inner surfaces of the cover section can be contoured to provide sealing surfaces for cooperation with a sealing bead of resilient material surrounding the electrical components within the head.

Abstract: A colored original is scanned point-by-point and density values are generated for each point in the primary colors red, green and blue. The points are divided into groups and the density values for each primary color are averaged over the respective groups. The averaged density values for each group are transformed into a set of converted values including a luminance value as well as first and second chrominance values. The range spanned by the luminance values is divided into segments and each set is assigned to a respective segment. The sets are classified as color dominant or color nondominant by comparing the saturation value of each set with a threshold value. For each, segment the first and second chrominance values of the nondominant sets are respectively added to yield first and second sums. The first and second sums are shifted relative to the gray point to generate corrected first and second sums.

Abstract: A quick-developing highly sensitive silver halide emulsion distinguished by steep gradation, a minimal increase in fog during storage, improved threshold gradation and low sensitivity to below-threshold pre-exposure is obtained by the addition of a diindoyl disulfide during preparation of the emulsion.

Abstract: A thermal transfer printing process wherein a donor element for thermal transfer is heated imagewise in contact with a receptor element to transfer thereon a UV-absorbing compound, said donor element comprising a sheet, ribbon or web support having on one side thereof a layer incorporating in a wax or polymeric binder material an UV-absorbing benzthiazole compound corresponding to the following general formula (A): ##STR1## wherein: Z represents the atoms necessary to close an unsubstituted or substituted adjacent aromatic ring or ringsystem,R.sup.2 represents hydrogen, an alkyl group of 1 to 4 carbon atoms, or a phenyl group,each of R.sup.3 and R.sup.4 (same or different) represents hydrogen, an amino group, a substituted amino group, an alkoxy group or a substituted alkoxy group.

Abstract: A method of drying a developed, wet sheet carrier, especially an X-ray film after passing through a development device includes passing the sheet carrier through a dryer which has several infrared radiators arranged along the path of the sheet carrier at its both sides and reflectors provided at the side away from the sheet carrier and deflecting the infrared radiator to the facing side of the sheet carrier. The method is performed so that a main stream is supplied at both sides of the sheet carrier at the rear side of the reflectors, a partial air stream is supplied between each infrared radiator and the sheet carrier, and then each partial air stream is united with the main air stream so that the temperature and the moisture of the main air stream increases in a flow direction.

Abstract: A scanner having a carriage (13) with a glass plate (52) for supporting an original document to be scanned while moving past an exposure opening, in which the glass plate is vertically displaceable against yieldable supporting springs mounted on a frame (47) of the carriage and is downwardly biased into contact with two lateral guide wheels (71,72) that are provided near the lateral ends of the exposure opening.

Abstract: A curtain coater for applying a layer or film of a liquid coating composition as a falling curtain on a surface of a continuous web moving around an arc of a backing roller, has a curved air shield arranged in closely spaced parallel relation to the roller periphery extending around a segment of said periphery directly upstream of the falling curtain to define an air gap through which the web passes before reaching said curtain. At the opposite end regions of the air shield and also at opposite side regions thereof are provided means, such as projections or sections of increased thickness, for increasing the resistance to air flow in the gap at the end and side regions compared to the air flow resistance in the region of the shield intermediate the end and side regions. A suction device communicates with the gap in the intermediate region to reduce the air pressure therein.

Abstract: A tank for wet treatment of a running web of photosensitive material has a set of upper pulleys and a set of lower pulleys mounted on a common support and movable up and down toward and away from the upper pulleys. The web is alternatingly trained over the upper and lower pulleys to advance along a meandering portion of its path from a first drive at the inlet into the body of liquid in the tank to a computer-controlled second drive at the locus of emergence of the web from the body of liquid. At least one additional drive is provided for one or more median upper pulleys to thus reduce the tensional stress upon the repeatedly looped running web. The additional drive can employ a capacitor motor, a d-c motor, a hysteresis motor or clutch, a pneumatic motor or a hydraulic motor. Such additional drive can rotate the respective upper pulley at a constant speed or at a speed which varies as a function of changes in the speed of advancement of the web through the body of liquid.

Abstract: In a dye acceptor element for the thermal dye sublimation printing process, containing a support and a dye acceptor layer consisting of a continuous phase and at least one disperse phase the dispersed phase is formed by a partially or completely cross-linked 1,3-dienehomo- or -co-polymer which has a solubility parameter of from 8 to 12 (cal/cm.sup.3).sup.1/2. The disperse phase makes up 20 to 90% by weight of the sum of the continuous and disperse phases. The dye acceptor element is distinguished by high resolution, high brilliance and good long term stability.

Abstract: UV sensitive direct positive silver halide photographic material for duplicating processes which can be safely handled under roomlight conditions, said material comprising a support having thereon at least one silver halide emulsion layer comprising a prefogged direct positive silver halide emulsion, preferably one having a chloride content of at least 70 mole % and comprising internal electron traps, said emulsion layer or a hydrophilic colloid layer in water-permeable relationship to said emulsion layer containing at least one nitro-substitued indazole or benzimidazole derivative and at least one non-nitro-substituted indazole or benzimidazole derivative.

Abstract: A cassette for light-tightly holding and dispensing a roll of web material, e.g. photographic film, which has a peripheral dispensing slot in its shell for passage of the web therefrom, which slot is formed by generally radially directed re-entrant lips lined with light-sealing strips to seal the slot against penetration by light, the sealing strips being adhered to the mutually facing surfaces of the lips by layers of adhesive on their backsides, preferably a pressure-sensitive adhesive, wherein the innermost edge of each of the adhesive layers is in a radially outwardly retracted position relative to the innermost edge of the associated sealing strip, leaving a short inner marginal portion of the sealing strip free of adhesive and overlying the inner edge of the adhesive layer to conceal and shelter the adhesive edge against possible contact with the exiting web.

Abstract: A method of reproducing an image according to non-standard reproduction rules wherein classification schemes of standard originals and of standard reproductions are used and wherein the rules for reproducing said image are determined from relations between said originals and between said reproductions and from transformations of said originals into said reproductions.

Abstract: A colored photographic original is scanned at a multiplicity of points in each of the primary colors red, green and blue to generate a set of image signals for each primary color. The average luminance of the original in each primary color is calculated from the radiation used for scanning and respective first correction signals for scattered light arising during scanning are produced from the average luminances. The correction signal for each primary color is subtracted from each image signal of the corresponding set. The corrected image signals are processed to enhance the image carried by the signals. The processed signals are sent to a printer. Furthermore, the processed signals of each set are averaged and the resulting averages used to produce respective second correction signals for scattered light arising during printing. The second correction signal for each primary color is subtracted from each processed signal of the corresponding set.

Abstract: A color photographic recording material comprising at least one blue-sensitive silver halide emulsion layer containing at least one yellow coupler, at least one green-sensitive silver halide emulsion layer containing at least one magenta coupler and at least one red-sensitive silver halide emulsion layer containing at least one cyan coupler and typical intermediate and protective layers, in which the silver halide coating of all the photosensitive layers, expressed as AgNO.sub.3, amounts to no more than 0.3 g/m.sup.2 and the color-coupler-containing layers contain at least one p-phenylenediamine compound containing at least one primary amino group and at least one ballast group dissolved in hydrophobic oil droplets, can be developed in an environment-friendly manner using an intensifying bath.

Abstract: A method of reenlargement of microfilm originals stored in form of microimages includes providing a plurality of microimages on a carrier, selecting microimages from the plurality of microimages for reenlargement on a receiving medium, positioning a selected microimage in an image window suitable for the reenlargement, transferring the microimage on the receiving medium by an objective focused on the image window, during the transfer of the microimage on the carrier positioning a second microimage located on another carrier in a second image window and after the transfer of the first mentioned microimage, transferring the second microimage on the receiving medium.

Abstract: The present disclosure relates to an electrophotographic method of obtaining a lithographic printing plate comprising the step of transferring a toner image from a toner image bearing member to a toner receiving plate, said toner receiving plate comprising a thermoplastic film support and a crosslinked hydrophilic layer thereon, characterized in that said crosslinked hydrophilic layer either carries on top thereof or incorporates spacing particles forming protuberances on said layer.According to a preferred embodiment, the average particle diameter by volume of the spacing particles is at least twice the average particle diameter by volume of the electrophotographic toner.

Abstract: Method for making lithographic aluminium offset printing plates according to the DTR-process by photo-exposing a photosensitive monosheet layer assemblage comprising a hydrophilic aluminium foil, a water-swellable intermediate layer comprising a non-proteinic hydrophilic film-forming polymer, and a silver halide emulsion layer, applying an aqueous alkaline solution thereto in the presence of a developing agent and a silver halide solvent, allowing to reduce the photo-exposed silver halide, allowing the unreduced silver halide or complexes thereof to diffuse to said aluminium foil to form a silver image thereon, and separating said emulsion layer and said intermediate layer from the imaged aluminium foil. The invention also relates to the photosensitive monosheet layer assemblage used for making such printing plates.

Abstract: In a laminated product wherein at least one supported information-containing hydrophilic colloid layer is adhesively bonded on at least one of its surfaces to a protective hydrophobic resin sheet, improved adherence is achieved by using as the bonding adhesive a cationic crosslinked polymer obtained by:a) condensing a polyalkylenepolyamine containing at least two primary amino groups and at least one secondary or tertiary amino group with a dicarboxylic acid to form a polyamidoamine,b) subjecting the resultant polyamidoamine to a graft reaction in the presence of an acid catalyst with an alkene-1,2-imine, andc) crosslinking the resultant graft polymer with an epihalohydrin, an Alpha-Omega dihalohydrin ether or the ether compound obtained by reaction of epichlorohydrin with a water-soluble polyalkyleneoxide to form the water-soluble cationic polymer. With this adhesive bond, a tamper-proof seal can be obtained between the information-containing colloid layer and the hydrophobic resin protective sheet.