Abstract: A photographic silver halide material comprising a compound which is capable of being reduced by a silver halide developing agent at a rate slower than that of image-wise developable silver halide and in reduced state is capable of releasing a photographically useful group, characterized in that said compound corresponds to the following formula: ##STR1## wherein: R.sup.10 and R.sup.20 (same or different)(1) represent an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group or an aralkyl group including said groups in substituted form,(2) represent an aryl group including a substituted aryl group, or(3) represent a heterocyclic ring residue including such residue in substituted form, orR.sup.10 and R.sup.20 are ringclosed, either R.sup.10 or R.sup.20 containing a ballasting group conferring diffusion resistance to the compound in hydrophilic colloid media when penetrated by an aqueous alkaline liquid;L.sup.1 and L.sup.2 (same or different) represent a ##STR2## --SO.sub.

Abstract: A cassette with two chambers for discrete cut films has a centrally disposed plate-like partition with two identical sides, and a pair of identical covers each of which is adjacent to a different side of the partition and is pivotably attached to the partition by a hinge for movement between an open and a closed position. The covers have exposure apertures and carry slidable plate-like shutters which can slide in slots of the respective covers to permit or prevent entry of light by way of the respective apertures. The film chambers are separated from each other by the central portion of the partition, and the latter further carries locks for releasably holding the covers in their closed positions. The lock for one of the covers is provided at that side of the partition which is adjacent to the other cover, and vice versa.

Abstract: In a photographic material suitable for use as image receptor element for the dye diffusion transfer process, a dyeable layer arranged on a layer support contains nickel chelates of a 2,2'-bisphenol corresponding to one of the general formulae I and II as metallizing agents for the formation of colored complexes of organic colorless or colored complex formers. The chelatizable image dyes which are transferred image-wise into the dye absorbent layer in the process of development give rise to the corresponding nickel complexes which have improved light stability. ##STR1## X=S, ##STR2## or --SO.sub.2 --; R.sup.1 =a hydrocarbon group optionally attached through --O-- or a halogen or R.sup.4 ;R.sup.2 =hydrogen, halogen, alkyl or alkoxy, alkenyl a condensed benzene ring or R.sup.4 if R.sup.1 does not denote a group R.sup.4 ;R.sup.3 =R.sup.2 or ##STR3## R.sup.4 =--CO--O--R.sup.5, ##STR4## --NH--CO--R.sup.2 or --NH--SO.sub.2 --R.sup.9 ; R.sup.5 =alkyl, aralkyl or cycloalkyl;R.sup.6, R.sup.

Abstract: A photographic copying machine wherein each of the three color filters comprises several triangular sectors which are pivotable about parallel axes into and from the path of copying light between first positions outside of the path, second positions of full overlap with the path and a finite or infinite number of intermediate positions. The pulleys for the sectors of each filter are rotatable by a discrete endless cord or cable which is further trained over a wheel receiving torque from a crank drive designed to move the sectors into the path of the light beam through progressively greater angles during movement from the second toward the first positions and through progressively smaller angles during movement from the first to the second positions under the action of a reversible stepping motor so that the crank drive can compensate for the lack of linearity between the filtering action of the sectors and the extent to which they project into the path of copying light.

Abstract: Sulfilimine compounds of formula I ##STR1## wherein X is the integrating residue of a photographically active compound H.sub.2 N--A--X andA is a linking member between X and N consisting of a benzene ring having at least two electron-attracting groupsare suitable compounds for photographic recording materials. The compounds can be split reductively to release the photographically active compound. Where the photographically active compound is a dye or dye precursor the sulfilimine compounds are suitable dye releasers for color diffusion transfer processes.

Abstract: An electronic image scanner is disclosed in various embodiments. Scanning of an image is divided into a first reproduction phase and a second reproduction phase. In the first reproduction phase, a first half-frame of a video signal is developed. In the second reproduction phase, a second half-frame of the video signal is developed. By utilizing the invention herein, a flicker-free video signal can be developed from a motion picture film while maintaining resolution of the resultant video signal at the conventional television resolution standard of 625 lines per film frame.

Abstract: The device comprises a container defining an inlet opening, an input area in alignment with the inlet opening and a stacking area adjoining the input area. A feeding mechanism, such as two pairs of worm conveyors, a pair of frictional rollers, a conveyor belt, a vane shaft and the like, is arranged in the input area near the inlet opening to transfer a print at an accelerated speed from the inlet area into the stacking area.

Abstract: A cassette for winding a band-like photographic material has housing with a slot for introducing the material, a driven winding core having an endless band tensioned by a plurality of rollers and arranged to place the front of the material onto the winding core, and two lever arms pivotable about pivot axes which are parallel to the winding core axis, carrying at their ends guiding rollers and coupled with one another via the endless band, wherein one of the lever arms is connected with a spring element so that the lever arms in an initial condition assume a first position in which said endless band widely embraces the winding spool, and during further winding upon overcoming a dead point of the spring element the lever arms assume a second position in which the endless band is brought out of the region of a greatest possible spool.

Abstract: The invention relates to a process for the production of colored images by the dye diffusion transfer principle, in which a color photographic recording material containing negative silver halide emulsions and reducible color-providing compounds is developed with an alkaline developer preparation containing a combination of at least one compound from each of at least two of the groups of compounds (A, B, C) defined below as development accelerators. With combinations of this type, equal or higher maximum color densities are obtained for a smaller overall quantity of development accelerator.A: a 1,3-diol containing from 3 to 10 carbon atomsB: a cyclohexane dimethanol or cyclohexene dimethanolC: an aryl alkanol or aroxyalkanol containing from 7 to 12 carbon atoms.

Abstract: A two-part arrangement of permanent magnets with low retentivity conducting elements for the flow of magnetic force is used in order to orientate magnetically anisotropic pigments in a suspension in the direction of tape travel during the production of a magnetic tape by means of magnetic fields. The first part of the arrangement acts on the suspension with an inhomogeneous strong magnetic field of about 5000 A/cm which is narrowly restricted physically, without anticipating the orientation in the direction of tape travel. Orientation in the direction of tape travel takes place in the second part of the arrangement which has a physically extended but weaker field.

Abstract: A photographic roll film camera has a film supply chamber, a spoolless film take-up chamber, a transporting element for transporting the film between these chambers, and a film roll-forming element including a part of the wall of the take-up chamber formed in correspondence to a whole film roll, and a spring-biased guiding lever extending into the take-up chamber and bounding together with the wall a small space for forming a first coil of the film roll so that the initial portion of the film is guided into the small space by the guiding lever and thereafter with increase of the diameter of the film roll during winding of subsequent coils, the guiding lever turns and space for formation of the film roll expands.

Abstract: Silver halide developer compounds containing amino groups and attached in the form of a salt to ion exchangers are embedded in layers of photographic recording material comprising at least one silver halide emulsion layer. In color photographic recording materials, the silver halide emulsion layers may have color-providing compounds associated with them.

Abstract: A container for X-ray films is of the type wherein at least one side of the film is contacted by a stratum of fluorescent material. The fluorescent material is biased against the respective side or sides of the film by two layers which consist of ferromagnetic and/or magnetic material, flank the film and attract each other. Such layers can be applied to the inner or outer sides of sheet-like carriers consisting of synthetic plastic material. The aforedescribed film, stratum or strata, layers and carriers may but need not be inserted into the space between the rigid or flexible walls of an envelope. The envelope can be dispensed with if the carriers consist of opaque material. Since each of the two carriers can support the respective layer and the respective stratum of fluorescent material, the thickness of the entire package is minimal and the film can be placed into close proximity of one or more objects to be imaged so as to obtain sharp images of such object or objects.

Abstract: A film transporting arrangement of a camera has a film transporting handle, a perforation wheel, a polygonal disk connected with the perforation wheel and having a plurality of surfaces and a number of corners corresponding to the number of teeth of the perforation wheel, and two arresting arms pretensioned relative to one another and arranged so that they engage the surfaces formed between two neighboring corners of the polygonal disk and correspond to these surfaces so as to press the polygonal disk, and thereby the perforation wheel, to a respective angular position.

Abstract: A film transport arrangement for a cassette has a film transport handle, a perforation wheel having a plurality of keys and arranged to engage a perforated film accommodated in a cassette having a film mouth and inserted or insertable in the camera and to move the film from the cassette, and an adjusting device for adjusting the perforation wheel and arranged between the film transport handle and the perforation wheel so that the perforation wheel is always held or brought into such an angular position in which one of its teeth engages in a perforation hole of a film initial portion lying in a film mouth of the cassette insertable or inserted in the camera.

Abstract: Compounds corresponding to the formula: ##STR1## wherein Z represents a radical which completes a condensed aromatic ring system;R.sup.1 represents an n-valent aliphatic or aromatic radical;R.sup.2 represents H, alkyl or aryl,R.sup.3 represents one or more radicals to control the diffusion properties and the activation pH;andn represents 1 or 2,are suitable ED precursor compounds for use in color-photographic recording materials. They are preferably used in a combination with reducible dye-releasers. They are also suitable as so-called scavengers.

Abstract: A filtering arrangement for adjusting the color composition of the copying light in a color copier has three filters located upstream of an original to be copied as considered in the direction of light propagation. Each filter is divided into three filter sections which are rotatable in unison so as to project into the path of the copying light to larger or smaller degrees. A motor is provided for each filter and each motor has a rotatable drive shaft which is parallel to the path of the copying light. One of the filter sections of each filter is fixedly mounted on the shaft of the corresponding motor for rotation therewith. The remaining two filter sections of each filter are mounted on the shafts of the other motors via roller bearings so as to be rotatable relative to such shafts. The three filter sections of each filter are connected by a cable so that all three filter sections rotate when the motor corresponding to the filter is actuated.

Abstract: A dispenser for dispensing photographic sheets from a stack, comprising a dispensing mechanism including a bodily displaceable rotatably supported dispensing roller that is provided with uni-directional anti-rotation device, and a bodily stationary, driven roller for cooperation with the bodily displaceable roller.