Patents Assigned to Agfa-Gevaert
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Patent number: 5279696Abstract: Uniting bands in the form of heat-sealable labels which bear encoded information are applied to exposed photographic films to join the films end-to-end. The encoded information is decoded by a reader before the labels are applied to the films to thus ensure that the hot sealing member which is used to apply labels cannot destroy or distort encoded information prior to decoding. Decoded information is used for the application of corresponding information to envelopes for exposed and developed films and for the prints of images of the respective film frames.Type: GrantFiled: September 29, 1989Date of Patent: January 18, 1994Assignee: AGFA-Gevaert AktiengesellschaftInventors: Helmut Zangenfeind, Gunther Scholch, Reinhart Wurfel, Rainer Turcke
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Patent number: 5273951Abstract: 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 slipping layer, characterized in that said slipping layer comprises the cured product of a moisture-curable binder composition prepared by mixing the following components (A) and (B):(A) 30 to 99 parts by weight of at least one copolymer of olefinically unsaturated compounds having a weight-average molecular weight [Mw] of at least 1500 and containing chemically incorporated moieties capable of undergoing an addition reaction with amino groups, and(B) 1 to 70 parts by weight of organic substances containing blocked amino groups from which substances under the influence of moisture compounds having free primary and/or secondary amino groups are formed,wherein i) the copolymers of component (A) contain intramolecularly bound carboxylic anhydride moieties, with the anhydride equivalent weight of the copolymers being from 196 to 9800 and ii) the binder composition conType: GrantFiled: June 17, 1992Date of Patent: December 28, 1993Assignee: Agfa-Gevaert, N.V.Inventors: Geert H. Defieuw, Daniel M. Timmerman, Harald Blum
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Patent number: 5273952Abstract: A dye acceptor element for thermosublimation printing comprising a support and a dye acceptor layer consisting essentially of polycarbonate arranged on the support, the polycarbonate containing 30 to 95% by weight aromatic carbonate structural units corresponding to formula I[--O--diphen--O--CO--] (I)in which diphen is the residue of a diphenol containing 6 to 30 and preferably 12 to 24 carbon atoms, and 70 to 5% by weight aliphatic polyether carbonate structural units corresponding to formula II[--O--polyether--O--CO--] (II)in which polyether is the residue of an aliphatic polyether diol having a molecular weight Mn of 600 to 20,000, is distinguished by high color density and a minimal tendency towards adhesion.Type: GrantFiled: January 24, 1992Date of Patent: December 28, 1993Assignee: Agfa Gevaert AGInventors: Rolf Wehrmann, Herbert Hugl, Dittmar Nerger
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Patent number: 5273858Abstract: Method for making lithographic aluminum offset printing plates according to the DTR-process by photo-exposing a photosensitive monosheet layer assemblage comprising a hydrophilic aluminum foil, an intermediate layer comprising hydrophobic polymer beads prepared by polymerization of ethylenically unsaturated monomer(s) and having an average diameter not lower than 0.2 .mu.m, and a silver halide emulsion layer, applying an aqueous alkaline solution to the photo-exposed silver halide emulsion layer in the presence of a developing agent and a silver halide solvent to form a silver image and to allow unreduced silver halide or complexes formed thereof to diffuse imagewise from the developed silver halide emulsion layer to said aluminum foil to produce thereon a silver image, and separating said emulsion layer and said intermediate layer from the imaged aluminum foil. The invention also relates to the photosensitive monosheet layer assemblage used for making such printing plates.Type: GrantFiled: October 28, 1991Date of Patent: December 28, 1993Assignee: Agfa-Gevaert, N.V.Inventors: Paul J. Coppens, Joan T. Vermeersch, Luc H. Leenders, Ludovicus H. Vervloet, Eric M. Hoes, Eddie R. Daems
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Patent number: 5273870Abstract: Reduced silver halide coverage combined with minimal color granularity and high inter-image effects are obtained with a color photographic negative recording material which, for at least one of the spectral regions blue, green, red, contains a laminate of several component layers containing silver halide and color couplers and consisting of at least one middle component layer B and upper and lower component layers A, A', A", A'", . . . , the middle component layer B having a sensitivity higher by at least 3 DIN than each of the component layers A, A', A", A'", . . . , and in which the component layer B contains a DIR compound which is capable of releasing an inhibitor having a diffusibility of not less than 0.4.Type: GrantFiled: December 13, 1991Date of Patent: December 28, 1993Assignee: Agfa-Gevaert AGInventors: Reinhart Matejec, Gunter Helling
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Patent number: 5271708Abstract: Photographic prints which issue from the outlet of the dryer in a developing machine are gathered into stacks, and successive stacks are admitted into successive empty compartments between the outwardly extending partitions of a belt or chain conveyor. The conveyor is advanced in stepwise fashion, to move successive empty compartments to a station for reception of stacks, by a panel which receives motion from a crank drive in such a way that it constitutes an extension of a partition at the station and during a certain stage of movement of such partition behind the stack in the freshly filled compartment. This renders it possible to maintain in proper orientation stacks which are assembled of relatively small, medium-sized or large prints.Type: GrantFiled: September 9, 1992Date of Patent: December 21, 1993Assignee: Agfa-Gevaert AktiengesellschaftInventor: Erich Nagel
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Patent number: 5272041Abstract: The present invention provides a method for obtaining a negative type lithographic printing plate comprising the steps of (i) image-wise exposing a diffusion transfer reversal imaging element comprising a direct positive silver halide emulsion that mainly forms an internal latent image and a layer containing physical development nuclei, (ii) fogging said image-wise exposed imaging element, (iii) developing said imaging element using a surface developer, (iv) transfering the undeveloped silver salts in the non-exposed areas to said layer containing physical development nuclei and (v) image-wise depositing said silver salts on said physical development nuclei in the presence of physical development restraining compound(s).Type: GrantFiled: October 10, 1991Date of Patent: December 21, 1993Assignee: Agfa-Gevaert, N.V.Inventor: Ludo L. Van Rompuy
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Patent number: 5271066Abstract: A device for reading of (a) location(s) on an image on a transparent support and an apparatus for scanning and digitizing at least part of said image defined by said location(s) on the transparent support.Type: GrantFiled: April 22, 1991Date of Patent: December 14, 1993Assignee: Agfa-Gevaert, N.V.Inventor: Jacques V. Leonard
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Patent number: 5270354Abstract: Method of making aqueous dispersions of hydrophobic polymer particles loaded with at least one hydrophobic compound, comprising the consecutive steps of dissolving said at least one hydrophobic compound in a water-immiscible organic solvent medium, dispersing the solution obtained in water or in an aqueous medium to form a dispersed phase having an average droplet size lower than 5 .mu.m, mixing the resulting dispersion with a dispersion of hydrophobic polymer particles in water or in an aqueous medium, said hydrophobic polymer particles being swellable in said water-immiscible solvent medium and having an average particle diameter ranging from 0.02 to 5.0 .mu.m, stirring the mixture obtained to allow said hydrophobic compound to associate with said hydrophobic polymer particles, and removing said water-immiscible organic solvent medium by evaporation.Type: GrantFiled: October 28, 1991Date of Patent: December 14, 1993Assignee: AGFA-Gevaert, N.V.Inventors: Joan T. Vermeersch, Rafael P. Samijn, Daniel M. Timmerman, Paul J. Coppens
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Patent number: 5270147Abstract: A stripping film material comprises a polyethylene terephthalate film base serving as temporary support being coated with a subbing layer essentially consisting of either:(1) hydroxypropylcellulose wherein the molar degree of substitution (DS) with hydroxypropyl groups is in the range of 3 to 1, or:(2) a copoly(vinyl acetate/crotonic acid) having a weight ratio of vinyl acetate to crotonic acid in the range of 85/15 to 99/1, wherein said subbing layer is coated with at least one hydrophilic colloid layer which is adapted to be stripped off after being moistened with an aqueous liquid, e.g. by contact with a wet surface of a permanent support.Type: GrantFiled: June 23, 1992Date of Patent: December 14, 1993Assignee: Agfa-Gevaert N.V.Inventors: Etienne A. Van Thillo, Eddie R. Daems, Luc H. Leenders, Guido J. Smits
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Patent number: 5268253Abstract: The present invention provides a method for making a lithographic printing plate according to the DTR-process comprising the steps of:information-wise exposing an imaging element comprising on a support in the order given a photosensitive layer containing a silver halide emulsion and a layer containing physical development nuclei;developing said information-wise exposed imaging element in the presence of developing agent(s) and silver halide solvent(s)characterized in that said silver halide emulsion comprises said silver halide in an amount of at least 2 g/m.sup.2 (expressed as AgNO.sub.3), said development is carried out in the presence of a physical development restraining compound and wherein imaging elements comprising a positive working silver halide emulsion of the internal latent image type are excluded. Lithographic printing plates with substantially improved printing endurance are obtained.Type: GrantFiled: January 27, 1993Date of Patent: December 7, 1993Assignee: Agfa-Gevaert, N.V.Inventor: Ludo Van Rompuy
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Patent number: 5266449Abstract: A bleaching bath for processing of a color photographic silver halide material which contains the ferric complex of alaninediacetic acid as the bleaching agent and in a dye-stabilizing amount a formaldehyde precursor of the formula ##STR1## wherein X and Y denote the residual atoms of a hetero aromatic 5- or 6-membered ring,yields color photographic images with excellent dye-stabilizing. In the atmosphere above the stabilizing bath no formaldehyde is detectable.Type: GrantFiled: October 30, 1992Date of Patent: November 30, 1993Assignee: Agfa Gevaert AGInventors: Christa Dacke, Heinrich Odenwalder, Hans Langen
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Patent number: 5266451Abstract: A color photographic recording material with a reflective support which contains a spectrally sensitized silver halide emulsion containing at least one sensitizer for the spectral region B in a layer free from color coupler adjacent at least one dye-producing silver halide emulsion layer sensitized for the spectral region A, the sensitivity of the spectrally sensitized silver halide emulsion of the layer free from color coupler being lower by 0.6 to 2.5 log H units than the sensitivity of the sensitized silver halide emulsion of the dye-producing silver halide emulsion layer, is distinguished by an extended gradation range in the region of the maximum densities and, hence, by distinctly improved fine detail resolution at high densities.Type: GrantFiled: May 4, 1992Date of Patent: November 30, 1993Assignee: Agfa Gevaert AktiengesellschaftInventors: Arno Schmuck, Manfred Peters, Helmut Kampfer, Wolfgang Schmidt
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Patent number: 5266442Abstract: A method for the production of a silver image with improved contrast by the development of an image-wise exposed photographic silver halide emulsion layer material with a developer liquid containing a hydroquinone in the presence of an auxiliary developing agent, wherein said developer liquid is applied to said photographic material containing silver halide grains that have been chemically sensitized with organic thiosulphonic acid anions in combination with a gold sensitizer in the absence of thiosulphate ions.Type: GrantFiled: December 17, 1991Date of Patent: November 30, 1993Assignee: Agfa-Gevaert N.V.Inventor: Richard A. Ooms
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Patent number: 5266549Abstract: A dye acceptor material for thermosublimation printing comprising a support and a dye acceptor layer, characterized in that the dye acceptor layer contains a copolymer ofa) 15 to 75% by weight of an aromatic vinyl compound,b) 5 to 40% by weight (meth)acrylonitrile,c) 10 to 70% by weight (meth)acrylates containing 4 to 18 C atoms in the alcohol radical,d) 0 to 30% by weight other vinyl monomers,with the proviso that the glass transition temperature of the copolymer is above 40.degree. C. and the ratio by weight of component a) to component b) is 1:1 to 4:1, is distinguished by high color density and adequate image stability for minimal lateral diffusion.Type: GrantFiled: October 11, 1991Date of Patent: November 30, 1993Assignee: AGFA-Gevaert AktiengesellschaftInventors: Robert Bloodworth, Wolfgang Podszun, Hermann Uytterhoeven
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Patent number: 5264339Abstract: In a method for the manufacture of a recording material containing a coated and dried gelatin containing layer on a support, the improvement wherein such layer is coated from an aqueous coating composition containing:(1) hydrophilic colloid matter consisting of at least 90% by weight of gelatin,(2) not more than 5% by weight with respect to the total gelatin content of a thickening agent increasing the viscosity of said composition, and(3) a hardening agent for gelatin that reduces its water-solubility after coating, characterized in that said gelatin is a gelatin species which as a 10% by weight aqueous solution at 36.degree. C. and pH 6 has a viscosity of at least 35 Mpa.s at a shear rate of 1000 S.sup.-1 and shows a decrease in viscosity by at least 10 Mpa.s at a shear rate of 40,000 s.sup.-1, and as a 3% by weight aqueous solution at Ph 6 and after cooling for 30 seconds at a shearing rate of 208 s.sup.Type: GrantFiled: September 4, 1992Date of Patent: November 23, 1993Assignee: Agfa-Gevaert N.V.Inventors: Bernard H. Tavernier, Frank P. Michiels
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Patent number: 5265148Abstract: An X-ray sheet film cassette has an upper cassette part, a lower cassette part adapted to face a radiation source and connected with the upper cassette part so that the cassette can be opened and closed. The lower cassette part has a frame and a plate connected with the frame. The plate includes an intermediate plate portion and two thin outer plate portions surrounding the intermediate plate portion. At least one of the outer plate portions extends outwardly beyond the intermediate plate portion at least at one edge of the plate and projects toward the interior of the X-ray sheet film cassette so as to form a web.Type: GrantFiled: January 16, 1992Date of Patent: November 23, 1993Assignee: AGFA -Gevaert AktiengesellschaftInventors: Walter Bauer, Manfred Schmidt, Ernst Widemann
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Patent number: 5262271Abstract: According to the present invention a method for producing a negative image is provided, comprising the following steps:image-wise exposing an imaging element comprising on a support, a light-sensitive silver halide emulsion layer comprising silver halide grains having an average volume of not more than 0.02 .mu.m.sup.3 and a layer containing non-light-sensitive water insoluble silver salt, to produce a latent image in said layer of light-sensitive silver halidedeveloping said latent image to produce physical development nuclei of silverdissolving the non-light-sensitive silver salts using a silver salt complexing agent andallowing the thus formed silver salt complexes to diffuse to the layer containing said image-wise formed physical development nuclei of silver to image-wise deposit and develop said silver salt complexes on said image-wise formed physical development nuclei of silver in the presence of (a) developing agent(s).Type: GrantFiled: October 10, 1991Date of Patent: November 16, 1993Assignee: AGFA-Gevaert, N.V.Inventors: Jean-Pierre D. Tahon, Wilhelmus Janssens
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Patent number: 5258355Abstract: A dye acceptor element for thermosublimation printing comprising a support and a dye acceptor layer containing a graft polymer of an unsaturated copolyester as the graft base and a vinyl copolymer as the graft shell is distinguished by high color density, high sharpness, good image stability and a minimal tendency towards adhesion to than dye-donor lint.Type: GrantFiled: January 30, 1992Date of Patent: November 2, 1993Assignee: Agfa-Gevaert AktiengesellschaftInventors: Robert Bloodworth, Wolfgang Podszun, Heinrich Alberts, Hermann Uytterhoeven
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Patent number: 5258354Abstract: Processes for increasing the density of images obtained by thermal dye sublimation transfer and printer for performing these processes.In addition to a dye transfer step, the same portion of a dye donor element is at least one more time image-wise heated and a second dye image which is in register with said first dye image is transferred to said receiving element.Alternatively, to a dye transfer step at least one step is added in which another portion of the dye donor element is image-wise heated and the image is transferred not in register with the image transferred during the first step.Type: GrantFiled: July 19, 1991Date of Patent: November 2, 1993Assignee: Agfa-Gevaert, N.V.Inventor: Henri M. Tack