Patents Assigned to Agfa
  • Patent number: 4770984
    Abstract: Color photographic motion picture projection film element comprising a transparent film support and coated thereon in succession, a blue-sensitive silver halide emulsion layer comprising a yellow-forming coupler, a red-sensitized silver halide emulsion layer comprising a cyan-forming coupler, an intermediate layer, a green-sensitized silver halide emulsion layer comprising a magenta-forming coupler, and an antistress layer, wherein between said support and said blue-sensitive silver halide emulsion layer a yellow antihalation undercoat is provided, which comprises at least one yellow non-diffusing dye that absorbs blue light and is removable and/or decolorizable in a processing bath and between said blue-sensitive silver halide emulsion layer and said red-sensitized silver halide emulsion layer a bluish antihalation intermediate layer is provided, which comprises at least one blue non-diffusing dye that absorbs red light and is removable and/or decolorizable in a processing bath.
    Type: Grant
    Filed: July 8, 1987
    Date of Patent: September 13, 1988
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Marc W. Ailliet, Felix J. Moelants, Ronnie G. Mampaey
  • Patent number: 4767698
    Abstract: Cyan partial color images with increased light fastness and improved stability to moisture and heat may be produced by the dye diffusion process using cyan dyes corresponding to formula I released from dye releasing compounds. ##STR1## In the above formula, Q denotes a group for completing a pyridine or pyridazine ring optionally carrying a condensed aromatic ring;G denotes OH or NH--SO.sub.2 --R.sup.5 ;R.sup.1 denotes H or one, two or three substituents;R.sup.2 denotes H or a group with electron acceptor character preferably situated in an ortho-position to G;R.sup.3 denotes H, acylamino or a group such as G;R.sup.4 denotes H, SO.sub.2 --NR.sup.6 --R.sup.7 or NH--SO.sub.2 --R.sup.5 ;R.sup.5 denotes alkyl, aralkyl, aryl or NR.sup.6 --R.sup.7 ;R.sup.6, R.sup.7 denote H, alkyl or aralkyl or together form a group for completing a cyclic amino group.
    Type: Grant
    Filed: April 13, 1987
    Date of Patent: August 30, 1988
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Peter Bergthaller, Rudolf Stolzenburg, Paul Marx
  • Patent number: 4766515
    Abstract: An electrostatic holder suitable for electrostatically adhering thereto paper and developed silver halide emulsion films, wherein said holder comprises in the following order:(1) an electrically insulating member carrying the hereinafter described elements (2) to (5),(2) an electrically conductive member acting as electrode,(3) a dielectric layer having a dielectric strength of at least 150 kV.cm and a thickness in the range of 10 to 1000 .mu.m,(4) an electrically conductive member acting as electrode and having the form of a grid or electrically interconnected conductor strips, and(5) a covering layer having a surface resistivity of at least 10.sup.9 ohm/square and a thickness of at most 100 .mu.m, andwherein said interconnected conductor strips are grounded and put at a direct current potential difference with respect to said electrode (2).
    Type: Grant
    Filed: September 24, 1987
    Date of Patent: August 23, 1988
    Assignee: Agfa-Gevaert N.V.
    Inventors: Romain H. Bollen, Jozef E. Marien, Valentin G. Wissels
  • Patent number: 4766059
    Abstract: The present invention relates to photographic elements comprising a support and on one or on both sides of said support in the given order at least one photosensitive silver halide emulsion layer and at least one protective hydrophilic colloid layer comprising finely divided solid spherical beads having an average size ranging from 0.5 to about 20 .mu.m, said beads comprising at least one photographically inert hydrophobic polymeric resinous material and, distributed throughout said resinous material, at least one water-insoluble wax, in a ratio by weight ranging from 10:0.1 to 10:5.The present invention also relates to a method of making such photographic elements.
    Type: Grant
    Filed: March 27, 1987
    Date of Patent: August 23, 1988
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Hubert Vandenabeele, Jacques L. Vervecken
  • Patent number: 4762777
    Abstract: Photographically useful compounds, i.e. in the present context compounds which, under development conditions, chemically react imagewise, after imagewise exposure, to produce desired reaction products in imagewise distribution, may be incorporated in the layers of photographic recording materials in the form of aqueous dispersions of polyurea or polyurethane compounds containing recurring structural units corresponding to the following formula:Q(--Y).sub.n Iin which Q represents the residue of the photographically useful compound; the other symbos are as defined in the specification.
    Type: Grant
    Filed: October 20, 1987
    Date of Patent: August 9, 1988
    Assignee: Agfa-Gevaert AG
    Inventors: Guter Helling, Helmut Reiff, Friedrich-Wilhelm Kunitz
  • Patent number: 4762759
    Abstract: An image-receiving material adapted for silver complex diffusion transfer processing and for forming a laminate, e.g. serving as an identification document, wherein said material comprises a hydrophobic resin support or resin-coated paper support directly coated on a resin surface thereof with a DTR-image receiving layer containing developing nuclei in a binder medium and comprising in percent by weight on its total weight the following ingredients:2% to 45% of gelatin,25% to 85% of colloidal silica,1.0% to 50% of a copolymer consisting of copolymerized ethylene and an alpha,beta-unsaturated carboxylic acid monomer in free acid or salt form, wherein the polymerized ethylene content is not lower than 80% by weight, and0.2% to 35% of a siloxane forming a reaction product through its siloxane group with the colloidal silica, the dry coverage of the image-receiving layer being in the range of 1 g to 15 g per m2.
    Type: Grant
    Filed: November 7, 1986
    Date of Patent: August 9, 1988
    Assignee: AGFA-Gevaert N.V.
    Inventors: Leon L. Vermeulen, Ludovicus H. Vervloet, Willy P. De Smedt, Piet Kok
  • Patent number: 4761933
    Abstract: A receptacle for packaging an order of photographs and negatives includes a base panel and a cover panel which define two pockets each of which has an openable and closable side. The base panel has a flap which extends beyond the openable and closable sides while the cover panel terminates at, and has an auxiliary tab adjacent to, the openable and closable sides. The flap is provided with a restraining tab which normally overlaps the auxiliary tab. The pockets have an open position in which the restraining tab is located between the auxiliary tab and the base panel, and a closed position in which the auxiliary tab is located between the restraining tab and the base panel. A device for closing the receptacle includes a slot designed to receive the region of the junction between the flap and the restraining tab, and a surface arranged to be contacted by the pockets.
    Type: Grant
    Filed: July 18, 1986
    Date of Patent: August 9, 1988
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Reinhard Nicko, Friedrich Meschenmoser, Karl-Heinz Sager, Rainer Turcke
  • Patent number: 4760915
    Abstract: A package containing a plurality of unexposed photographic film reels, which comprises a vertical mantle, a top and bottom lid with a peripheral groove and a sealing ring that is engaged by the corresponding extremity of the mantle, straps that vertically encircle the package to damp-tightly lock the lids to the mantle, and spacing means at the underside that allow the forks of an elevating mechanism to engage the package.
    Type: Grant
    Filed: October 29, 1986
    Date of Patent: August 2, 1988
    Assignee: AGFA-Gevaert N.V.
    Inventors: Marc J. Boets, Raymond A. Heylen
  • Patent number: 4761357
    Abstract: Electrophoretic process and apparatus for developing an electrostatic charge pattern carried by a dielectric surface by progressively moving that surface through a development station and simultaneously progressively advancing a layer of liquid toner (11) comprised of toner particles dispersed in a carrier liquid, through that station in proximity to said charge-carrying surface, (3), and imposing an electric field bias to cause or promote selective image-wise movement of toner particles through said liquid at said development station and deposition thereof on said charge-carrying surface in a pattern representing said electrostatic charge pattern, wherein said layer of liquid toner contains toner particles in a concentration of from 2 to 25% by weight, and including the step of applying a film of a substantially toner-free non-polar liquid which is miscible with the carrier liquid of said liquid toner and which has a specific conductivity lower than 0.
    Type: Grant
    Filed: March 25, 1987
    Date of Patent: August 2, 1988
    Assignee: AGFA-Gevaert N.V.
    Inventors: Serge M. Tavernier, Pierre R. De Roo, Jozef L. Mampaey, Robert F. Janssens
  • Patent number: 4760015
    Abstract: Photographically produced black-and-white images (silver images) are stabilized against subsequent destruction of the silver image, in particular against the occurrence of so-called microspot defects, by treatment of the finished silver image with an aqueous after-treatment bath containing an amino-1,2,4-triazole.
    Type: Grant
    Filed: April 13, 1987
    Date of Patent: July 26, 1988
    Assignee: Agfa Gevaert Aktiengesellschaft
    Inventors: Werner Berthold, Gunther Mahlberg, Paul Marx, Hans hlschlager
  • Patent number: 4760416
    Abstract: A wet processing arrangement for photosensitive articles has a container for a processing bath. A rack is mountable in the container and includes a set of rollers which define nips for advancing photosensitive articles through the bath. A drive for the rollers is disposed inside the container. Means is provided to eliminate air bubbles which tend to form beneath the nips of the rollers as the rack is immersed in the bath.
    Type: Grant
    Filed: October 1, 1986
    Date of Patent: July 26, 1988
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventor: Wilfried Hehn
  • Patent number: 4759679
    Abstract: A device for loading X-ray film cassettes comprises a housing having a compartment receiving a cassette, a plurality of boxes accommodating film dispensing magazines positioned one above another in the housing, a suction device and transport roller pairs for transporting a film sheet sucked by the suction device towards the cassette. The suction device which includes at least one sucker is displaceable between a dispensing magazine, which contains a film pack corresponding in size to that of the cassette, and the transport roller pairs so as to provide a transport path for the film sheets with very few direction changes.
    Type: Grant
    Filed: March 23, 1987
    Date of Patent: July 26, 1988
    Assignee: Agfa-Gevaert AG
    Inventor: Jurgen Muller
  • Patent number: 4758505
    Abstract: Silver halide emulsions are prepared by precipitation, transfer of the silver halide emulsion from the precipitation chamber into a separate circuit comprising a cleaning stage for the removal of dispersion medium and compounds soluble therein and exit into a collecting vessel.
    Type: Grant
    Filed: October 28, 1986
    Date of Patent: July 19, 1988
    Assignee: Agfa Gevaert Aktiengesellschaft
    Inventor: Klaus Hoffmann
  • Patent number: 4756990
    Abstract: A method of effecting high contrast development of an image-wise exposed photographic silver halide emulsion layer material wherein the developing proceeds in an aqueous medium having a pH of 10 to 12 and containing:(a)(i) hydroquinone or a substituted hydroquinone,(ii) an auxiliary developing agent having a developing activity of such degree as to give when utilized in the Standard Development Test defined in the specification a relative development rate (f.sub.x) in the range of about 1-2(b) free sulphite ions in an amount of at least 5 grams per liter of the medium,(c) an organic anti-fogging agent, and(d) a polymer containing a plurality of alkylene oxide units having a molecular weight of at least about 1500.
    Type: Grant
    Filed: March 24, 1986
    Date of Patent: July 12, 1988
    Assignee: AGFA-Gevaert N.V.
    Inventors: Richard A. Ooms, Robert J. Pollet
  • Patent number: 4757352
    Abstract: To monitor the picture taking of documents in a camera assembly including a paging device and an exposure device, the documents pertaining to a partial stack of documents are provided with serial page numbers within a digital range assigned to the partial stack. In the exposure device the film pictures are exposed with a blip sign whose shape is assigned to the processed digital range. During the passage of respective documents through the assembly, an electronic control generates in the respective paging and exposure devices binary coded first and second signals assigned to the digital range of the serial numbers and to the corresponding blip signs. The first and second binary coded signals are applied via evaluation units and a comparator into an intermediate memory.
    Type: Grant
    Filed: August 27, 1987
    Date of Patent: July 12, 1988
    Assignee: Agfa-Gevaert AG
    Inventors: Manfred Weinzierl, Eberhard Zieran
  • Patent number: 4757351
    Abstract: A transparent colored original is scanned region-by-region and the density of each region in each of the primary colors red, green and blue determined. Each region represents an area constituted by a large number of points. The densities for each region are processed to generate parameters characteristic of the coloring of the respective region. These parameters are compared with respective threshold values. An overall density for the original in each of the primary colors is now calculated. In performing these calculations, those regions for which the characteristic color parameters exceed the respective threshold values are assigned less weight than the remaining regions. This is due to the fact that the former regions are assumed to contain color dominants. The orginal is next scanned line-by-line and point-by-point in each of the primary colors to generate imaging signals for use in printing the original on copy material.
    Type: Grant
    Filed: August 14, 1987
    Date of Patent: July 12, 1988
    Assignee: AGFA-Gevaert Aktiengesellschaft
    Inventor: Klaus Birgmeir
  • Patent number: 4756998
    Abstract: Polymeric couplers with recurring units which contain at least one urethane and/or urea group, are suitable for the production of improved photographic recording materials.
    Type: Grant
    Filed: October 3, 1986
    Date of Patent: July 12, 1988
    Assignee: Agfa Gevaert Aktiengesellschaft
    Inventors: Gunter Helling, Friedrich-Wilhelm Kunitz, Hans Langen
  • Patent number: 4755470
    Abstract: A process for measuring the relative equilibrium moisture content, particularly of surface samples such as papers, films, woven material or the like, with which the sample is introduced into a hermetically sealable measuring tube and then the equilibrium moisture content arising from a temperature which is predetermined and adjustable by means of a thermostat is measured by a moisture sensor inserted into the measuring tube and not touching the sample. An apparatus serves to carry out the process which has a measuring tube which can be sealed on both sides and can be inserted into a thermostat, in which measuring tube frames are arranged for holding the sample to be examined, and which has a moisture sensor provided at the side sealing the measuring tube.
    Type: Grant
    Filed: December 12, 1985
    Date of Patent: July 5, 1988
    Assignee: Agfa Gevaert Aktiengesellschaft
    Inventors: Jorg M. Soder, Saleman Hamed
  • Patent number: 4754875
    Abstract: A roll film magazine frame for supporting a film spool which receives a roll film and for inserting through an insertion opening into a shaft of a micro roll film reading device, the roll film magazine frame comprises a polygonal body part having a plurality of sides and a plurality of corners each between two adjacent sides, the body part having a recess provided in one of the sides for introducing a film from a film coil into the reading device, an opening provided in another side for introducing a friction member of the reading device for contacting a roll film on the film spool, the side of the body part including a further side which is accessible from outside when the magazine frame is inserted in the shaft, the further side being formed as a cover which is turnable outwardly away of a remaining portion of the body part so as to allow withdrawal of the film spool from the body part and insertion of another film spool into the body part.
    Type: Grant
    Filed: August 18, 1986
    Date of Patent: July 5, 1988
    Assignee: AGFA-GEVAERT AG
    Inventors: Walter Rauffer, Eugen Schuhmeir, Gunter Czapla
  • Patent number: 4755452
    Abstract: The stability to light of images produced from magenta couplers is improved by a combination of a hydroquinone and an indole.
    Type: Grant
    Filed: January 20, 1987
    Date of Patent: July 5, 1988
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Werner Liebe, Hans Vetter