Patents Assigned to Agfa
  • Color filter arrangement for optoelectric converting devices
    Patent number: 4481530
    Abstract: A color filtering device for a charge-coupled photoelectric converting device including a series of uniformly configured photoelectric converting elements which are sensitized by the filtering arrangement in the order of green, blue, green and red. The filtering arrangement includes a transparent filter carrier supporting a series of green, blue, green, red, blue, green, and so on, filtering elements. The active surface of each blue filtering element is equal to the active surface of the assigned photoelectric converting element. The green and red filtering elements are reduced in size in inverse proportion to the spectral sensitivity of the assigned photoelectric converting element. The resulting spacings between the elements are covered by an opaque masking layer, preferably of chromium.
    Type: Grant
    Filed: May 19, 1982
    Date of Patent: November 6, 1984
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Eduard Wagensonner, Ulrich Krekeler, Wolfgang Ruf
  • Arrangement for and a method of processing photosensitive articles
    Patent number: 4480901
    Abstract: A developing apparatus for photosensitive material has a processing bath and a conveying system for advancing photosensitive material through the path. A supply vessel accommodates a regenerating solution for the bath and a flow regulating device such as a pump or a valve is provided to regulate the admission of the regenerating solution into the bath. A sensing system senses the surface area of the photosensitive material advanced into the bath and supplies this information to a computer which then calculates the quantity of regenerating solution to be supplied to the bath. The control unit operates the flow regulating device at intervals in order to deliver the calculated quantity of regenerating solution to the bath. A measuring unit connected with the computer measures the actual quantity of regenerating solution supplied to the bath during operation of the flow regulating device.
    Type: Grant
    Filed: September 21, 1982
    Date of Patent: November 6, 1984
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Viktor Osegowitsch, Jurgen Leuchter
  • Apparatus for the liquid processing of a surface of a material in the form of a sheet, a web or a plate
    Patent number: 4480907
    Abstract: An apparatus is described for the liquid processing of a surface of a moving sheet, web or plate. Processing liquid is supplied to the surface via a plurality of elongated discharge orifices extending across the width of said moving sheet or web in an oblique angle with respect to the direction in which said sheet, web or plate is advanced within said apparatus. By the oblique arrangement of the discharge orifices air bubbles entrapped in the processing liquid as a result of pumping can be carried off and processing faults reduced.
    Type: Grant
    Filed: January 24, 1983
    Date of Patent: November 6, 1984
    Assignee: AGFA-GEVAERT N.V.
    Inventor: Leo N. Vackier
  • Process and an apparatus for stabilizing free-falling liquid curtains
    Patent number: 4479987
    Abstract: The stabilization of free-falling liquid curtains (4) in the coating of objects or webs (5) using curtain coaters is considerably improved by the use of curtain holders (9) from which an additional auxiliary liquid (11) issues towards and combines with the curtain (4), for laterally guiding the free-falling curtain (4) formed at the coating edge (3) of the coater. Triangular liquid bridges (14) are thus formed between the curtain (4) and the curtain holders (9) from the coating edge (3) to the point where the curtain (4) impinges on the layer support (5). The curtain holders (9) consist of tubular hollow bodies with a delivery spout (10) and a distributing passage (12) for the liquid (11) and an exit slot (13) or of a porous tubular material without any exit slot (FIG. 3).
    Type: Grant
    Filed: December 21, 1983
    Date of Patent: October 30, 1984
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: G/u/ nther Koepke, Hans Frenken, Heinrich Bussmann, Kurt Browatzki
  • Photographic recording material for the production of color images to be viewed by reflected light
    Patent number: 4480027
    Abstract: A photographic recording material for the production of color images to be viewed by reflected light contains, on a transparent support layer at least 60 .mu.m in thickness with smooth surfaces, a plurality of silver halide emulsion layers with differing spectral sensitivities and color couplers associated therewith and a light reflective opaque layer of binder. The material is developed chromogenically from the coated side. Exposure and viewing are carried out through the transparent support layer.
    Type: Grant
    Filed: November 3, 1982
    Date of Patent: October 30, 1984
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Erwin Sch/o/ n, Karl-Wilhelm Schranz, Erich Wolff
  • Fusible electrostatically attractable toner
    Patent number: 4478923
    Abstract: A toner composition of electrostatically attractable fusible powder particles suitable for fixing with simultaneous heat and pressure, having a melt viscosity at 140.degree. C. in the range of 10.sup.5 to 10.sup.6 mPa.s, an average particle size in the range of 1 to 50 .mu.m, and comprising a coloring substance and more than 80% of their volume of a mixture of: a combination of fumaric-bisphenolic and fumaric, propoxylated bisphenolic polyester resins, a sterically-hindered phenol release agent, and a melt-viscosity controlling pigment e.g. barium sulphate.
    Type: Grant
    Filed: January 13, 1983
    Date of Patent: October 23, 1984
    Assignee: AGFA-Gevaert N.V.
    Inventors: Pierre R. De Roo, Yvan K. Gilliams, Francine Van Gijsel
  • Aqueous copolyester dispersions suited for the subbing of polyester film
    Patent number: 4478907
    Abstract: An aqueous copolyester dispersion suitable for the subbing of polyester film without use of organic solvents wherein the copolyester contains recurring ester groups derived from ethylene glycol and an acid mixture essentially consisting of 20 to 60 mole % of isophthalic acid, 6 to 10 mole % of sulphoisophthalic acid whose sulfo group is in salt from, 0.05 to 1 mole % of an aromatic polycarboxylic acid compound having at least three carboxylic acid groups, which compound is not capable of forming intramolecularly an anhydride and includes at least two carboxylated aromatic nuclei, and the balance of terephthalic acid; the copolyester has a glass transition temperature of at least 50.degree. C. and an intrinsic viscosity of from 0.15 to 0.45 dl/g when measured at 25.degree. C. in a mixture of phenol/o-dichlorobenzene (60/40 by volume).
    Type: Grant
    Filed: October 26, 1982
    Date of Patent: October 23, 1984
    Assignee: AGFA-Gevaert N.V.
    Inventors: Lucien J. Van Gossum, August M. Marien, Walter F. De Winter, Etienne A. Van Thillo
  • Means for holding X-ray films
    Patent number: 4479232
    Abstract: A cassette or an analogous support for sheet-like X-ray film has a bottom wall and a top wall which latter is connected to the bottom wall by a hinge. One of the walls carries a magnetic plate which is overlapped by a first intensifier screen for the X-ray film. The other wall carries a flat flexible receptacle for a ferromagnetic layer therewithin, and the receptacle is overlapped by a second intensifier screen. When a film is inserted between the two screens, the cassette is closed whereby the magnetic layer attracts the ferromagnetic layer with the result that the two screens are biased against the respective sides of the film therebetween. The second screen may constitute an integral part of the receptacle which latter consists of a material, such as paper or synthetic plastic, that is permeable to X-rays.
    Type: Grant
    Filed: April 11, 1983
    Date of Patent: October 23, 1984
    Assignee: AGFA-Gevaert Aktiengesellschaft
    Inventor: Walter Bauer
  • Magnetic storage medium
    Patent number: 4477531
    Abstract: The present invention relates to a magnetic storage medium consisting of a non-magnetic layer support and, applied thereto, a binder-containing magnetic layer, the binder consisting of from 25 to 100% of a thermoplastic polyurethane substantially free from reactive terminal groups obtained by reacting a linear polyester of at least one dicarboxylic acid containing from 2 to 8 carbon atoms and/or hydroxy carboxylic acid containing from 4 to 6 carbon atoms and at least one glycol containing from 2 to 6 carbon atoms, the polyester having a molecular weight of from 1200 to 6000, at least one diisocyanate and a mixture of at least two glycols containing from 2 to 20 carbon atoms, the molar fraction of the individual components not exceeding 0.8. The polyurethane has a hardness of from 80 to 100 Shore A, a tensile strength of from 30 to 75 MPa and a breaking elongation of from 320 to 520%.
    Type: Grant
    Filed: July 8, 1982
    Date of Patent: October 16, 1984
    Assignee: Agfa-Gevaert AG
    Inventors: Robert Kohler, Burkhard Nippe, Heinrich Kober, Karlchristian Schilffarth, Walter Meckel, Bernd Quiring
  • Diffusion transfer material and process
    Patent number: 4477554
    Abstract: A photographic material for diffusion transfer photography containing a quinonoid compound, which is capable in reduced state and under alkaline conditions of releasing a dye moiety for the production of a dye image and corresponds to the following general formula (G): ##STR1## wherein: R.sup.8 is hydrogen or methyl in the 6- or 7-position (indicated by an asterisk) on the saturated adjacent ring part of the quinonoid nucleus,R.sup.9 is an alkyl group or a substituted alkyl group, an aromatic group or a substituted aromatic group,R.sup.10 is hydrogen, an alkyl group or an aryl group, and at least one of the substituents R.sup.9 and R.sup.10 represents or includes a ballasting group of sufficient size to render said compound immobile in an alkali-permeable hydrophilic colloid layer when such layer is permeated with an aqueous alkaline liquid.
    Type: Grant
    Filed: October 26, 1983
    Date of Patent: October 16, 1984
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Christian C. Van de Sande, Andre Verhecken
  • Photographic material containing a layer capable of being dyed by organic dyes
    Patent number: 4474854
    Abstract: In a photographic material suitable as image receptor element for the dye diffusion transfer process, a dye absorbent layer arranged on a layer support contains nickel chelates or copper-II chelates of a compound corresponding to the following general formula I as metallizing agents for the formation of colored complexes from colorless or colored organic complex formers. The chelatable image dyes transferred imagewise to the dye adsorbent layer in the course of development give rise to the corresponding nickel or copper-II complexes with improved light stability. ##STR1## wherein R.sup.1 represents a hydrocarbon group having up to 30 carbon atoms optionally interrupted by --O--;R.sup.2, R.sup.3 represents H, alkyl having up to 5 carbon atoms or aryl having from 6 to 10 carbon atoms; andR.sup.4, R.sup.4' represents alkyl or alkoxy having from 1 to 4 carbon atoms, aralkyl or OH.
    Type: Grant
    Filed: January 10, 1983
    Date of Patent: October 2, 1984
    Assignee: Agfa-Gevaert AG
    Inventors: Peter Bergthaller, Jurgen Strauss
  • Method of and a device for sensing objects
    Patent number: 4473822
    Abstract: A single ultrasonic generator is employed for detecting objects, particularly copies processed in photographic devices. The sound-radiating surface of the generator is spaced apart from a reference plane about a distance equal to an integer multiple of half the wavelength of the ultrasonic waves. The changes of damping of the ultrasonic resonance circuit resulting from the acoustic load variations are measured in an electronic evaluation circuit.
    Type: Grant
    Filed: April 30, 1982
    Date of Patent: September 25, 1984
    Assignee: Agfa-Gevaert AG
    Inventor: Heinz Schiffl
  • Spool for video cassette
    Patent number: 4473198
    Abstract: This invention relates to a spool for video cassettes comprising at least one flange which is raised from or deposited onto the base of the cassette against the force of a spring. The spool has a hollow-cylindrical projection (11) which is open to the outside, in the center of the top of the spool hub, in which projection (11) a spherical body (12) of abrasion-proof plastics material is clamped, for example, polyoxymethylene. The spherical cap protruding from the projection protrudes beyond other pins (10) which are optionally moulded on the surface. The spool itself is made of a different, plastics material of less hardness compared with that of the spherical body.
    Type: Grant
    Filed: August 9, 1982
    Date of Patent: September 25, 1984
    Assignee: Agfa-Gevaert AG
    Inventors: Albert Pertzsch, August Liepold, Hubert Brunner
  • Apparatus for introducing strip-shaped material into cassettes or the like
    Patent number: 4469291
    Abstract: A copying machine admits a web of freshly exposed photographic paper directly into a cassette whose core engages and convolutes the web therearound. The progress of engagement between the leader of the web and the core is monitored by comparing the peripheral speed of the core with the peripheral speed of a rotor forming part of an advancing roll for the web and receiving torque from a variable-speed motor which also drives the core. The peripheral speed of the rotor increases when the leader of the web is adequately attached to the core, and this is detected by a circuit having first and second photoelectronic monitoring devices which respectively monitor the peripheral speeds of the rotor and the core.
    Type: Grant
    Filed: September 14, 1982
    Date of Patent: September 4, 1984
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Helmut Treiber, Christian Gotze, Gunter Lammel, Erich Nagel
  • Automatic exposure control for automatic-focus cameras
    Patent number: 4466718
    Abstract: When a trigger lever is depressed, both a focus adjuster ring and a control disk commence to rotate in unison, driven by a spring mechanism. Position-sensing switches receive signals indicating which subject-distance setting the focus adjuster ring should be arrested at, and furthermore are opened and closed by the control disk during movement of the latter. When the focus adjuster ring reaches the required subject distance setting, it is arrested and kept arrested, thereby completing an automatic focussing operation, but the control disk continues to turn on to its end position, at which it causes the shutter mechanism of the camera to open and furthermore the exposure-timing circuit of the camera to initiation a scene-light-dependent exposure-timing operation.
    Type: Grant
    Filed: November 12, 1980
    Date of Patent: August 21, 1984
    Assignee: Agfa-Gevaert AG
    Inventors: Peter Lermann, Istvan Cocron, Gunter Fauth
  • Cassette for rolls of photosensitive material
    Patent number: 4466579
    Abstract: A cassette for winding and unwinding rolls of photographic paper has a rotatable shaft which traverses the cassette. A spool for supporting a roll of photographic paper is mounted on and circumscribes the shaft. The shaft is supported by a pair of opposite sidewalls of the cassette. Bearing rings are mounted in each of the sidewalls and the shaft carries a pair of bearing disks which respectively mate with the bearing rings. The bearing rings and disks are designed such that they form a braking system for the shaft. An overrunning clutch is arranged between the shaft and each of the bearing disks. The overrunning clutches are oriented so that the shaft rotates freely when photographic paper is being wound onto the spool. During unwinding of photographic paper from the spool, the clutches engage and the braking system for the shaft becomes operative.
    Type: Grant
    Filed: September 15, 1982
    Date of Patent: August 21, 1984
    Assignee: Agfa-Gevaert AG
    Inventors: Wilhelm Nitsch, Erich Nagel
  • Arrangement for projecting an identifying image on to a film
    Patent number: 4465364
    Abstract: An arrangement is disclosed for projecting an identifying image from a data carrier on to a film in a cassette provided with a window which may be sealed against light. The arrangement has an opening mechanism for pushing a cover for the window open and closed. The arrangement further has a projection mechanism and switch means for triggering the opening mechanism and the exposure. The opening mechanism has an engaging device which is guided on a carriage and engages the window cover. The engaging device, which is held in engagement with the window cover via a spring, may be disengaged from the same in any position of the carriage by means of a lifting mechanism. The lifting mechanism has a crank which is connected with the engaging device and is operable from externally.
    Type: Grant
    Filed: July 12, 1982
    Date of Patent: August 14, 1984
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Heinz Krobel, Heinrich Farber, Jurgen Muller
  • Process for the production of magnetic dispersions containing binders
    Patent number: 4465608
    Abstract: This invention relates to the addition of organic boron compounds, prepared by either reacting boric acid with polyhydric alcohols having a total of 5 or more neighbouring OH groups per boron atom and then with polyethylene oxide in a mol ratio of 1:40, based on 1 mol of borate which is obtained, and with a carboxylic acid having from 8 to 22 carbon atoms or reacting boric acid first with polyhydric alcohols having a total of 5 to 11 neighbouring OH groups per boron atoms, and the with a carboxylic acid having from 8 to 22 carbon atoms, said boron compound being added, in a quantity of from 3 to 12, in particular from 3 to 6 parts, by weight, based on 100 parts, by weight, of magnetic pigments, and in particular of metal powders, to the grinding operation of the magnetic pigment dispersion and then processing in a known manner.
    Type: Grant
    Filed: June 24, 1982
    Date of Patent: August 14, 1984
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Johannes Gerum, Burkhard Nippe, Heinrich Kober, Robert Kohler
  • Dispenser for dispensing photographic sheets from a stack
    Patent number: 4463943
    Abstract: A dispenser for dispensing photographic sheets from a stack, comprising a dispensing mechanism with first and second sheet buckling members operative to make the upper sheet buckle and lift and then to release the leading edge of the buckled sheet to allow it to move under recovery forces of the sheet into a forward position beyond the end of the stack of sheets.
    Type: Grant
    Filed: September 3, 1981
    Date of Patent: August 7, 1984
    Assignee: Agfa-Gevaert N.V.
    Inventor: Hugo F. Deconinck
  • Color photographic recording material
    Patent number: 4464464
    Abstract: The color yield and color granularity of color photographic recording materials is improved by using compounds of the general formula I as the sole or as additional oil formers in coupler-containing internal layers. The effect is particularly clear in layers having the small amount of gelatine. ##STR1## wherein: R.sup.1 is an aliphatic group having at least 8 carbon atoms,R.sup.2 is hydrogen or alkyl,R.sup.3 is a heterocyclic group or --(X).sub.n --R.sup.4,R.sup.4 is aryl,X is --O--, --NH--, --NCH.sub.3 --, or --CH.dbd.CH--,m is 0, 1 or 2, andn is 0 or 1.
    Type: Grant
    Filed: July 26, 1982
    Date of Patent: August 7, 1984
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Reinhart Matejec, Fritz Nittel, Johannes Sobel