Patents Represented by Attorney, Agent or Law Firm Thomas H. Magee
  • Patent number: 5579031
    Abstract: A process and related apparatus for producing at least two matched color displays of a digital image using two different display devices, comprising using an adaptor to convert the digital information representing the image to digital information such that the displayed image as a result of this converted digital information on one of the devices, appears the same as the image displayed on the other to an average observer when viewed under similar viewing conditions. The adaptor contains a transform LUT constructed using display device modeling to generate corresponding values to preselected input digital image values to map the input color values into the color space of the display device so that image matching is achieved.
    Type: Grant
    Filed: February 14, 1995
    Date of Patent: November 26, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Zhongjie Liang
  • Patent number: 5563234
    Abstract: A carrier plate for use in a lamination process in the preparation of a multicolor proof. The carrier plate comprises a metal support and a flap member mounted to a front edge of the support.
    Type: Grant
    Filed: August 23, 1993
    Date of Patent: October 8, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: David C. Otto
  • Patent number: 5563421
    Abstract: An image capture panel includes a plurality of sensors arrayed adjacent to a substrate layer of dielectric material, and a radiation sensitive layer disposed over the sensors. The radiation sensitive layer is exposed to a first substantially uniform pattern of light radiation for partially neutralizing residual electrical charges trapped within the image capture panel. The radiation sensitive layer is then exposed to a second substantially uniform pattern of light radiation sufficient to neutralize substantially all residual electrical charges trapped within the image capture panel.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: October 8, 1996
    Assignee: Sterling Diagnostic Imaging, Inc.
    Inventors: Denny L. Y. Lee, Lawrence K. Cheung
  • Patent number: 5557857
    Abstract: An apparatus for the aftertreatment of photopolymerizable printing plates with means for generating an environment with at least one predetermined condition and a transport device to carry the plates during and for transport of the plates through the apparatus. By uncoupling the transport velocity from the prior process steps, such an apparatus enables in-line aftertreatment. The transport device has multiple orbiting pallets on a type of continuous elevator conveyed at least section-wise through the environment.
    Type: Grant
    Filed: September 7, 1993
    Date of Patent: September 24, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Herbert Konermann, Reinhard Helmer
  • Patent number: 5552262
    Abstract: High volume manufacturing process for flexographic printing plates comprises wash out, drying and post-exposure. During drying the printing plates are transported with a plurality of endless conveyors. The transport speed during drying/post-exposure is lower than the transport speed during wash out such that a storage of flexographic plates can be achieved in the drying and post exposure portion of the process.
    Type: Grant
    Filed: September 7, 1993
    Date of Patent: September 3, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Herbert Konermann
  • Patent number: 5529473
    Abstract: An apparatus for fabricating integral three-dimensional objects from successive layers of deformable and photoformable compositions by exposing the layers of the composition through a tensioned, elastomeric transparent film, in a way that the weak bonds between the film and each newly solidified layer are broken by changing the tension on the film, thus allowing a new layer of deformable composition to be introduced between the film and the solidified layer.
    Type: Grant
    Filed: March 10, 1992
    Date of Patent: June 25, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John A. Lawton, Daniel J. Mickish
  • Patent number: 5528377
    Abstract: A process for reproducing an original color image on a printing device includes separating each pixel of the original image into a plurality of color components to obtain an image density value for each color component at each pixel. A number of printing elements are selected for each color component, the number of printing elements being more than one for at least one of the color components. The printing density values for each color component having more than one printing element are separated into at least two pixel groups, the first pixel group containing printing density values less than or equal to an assigned maximum printing density value achievable with a single printing element for that color component, and the second pixel group containing printing density values greater than said assigned maximum printing density value for that color component.
    Type: Grant
    Filed: March 29, 1994
    Date of Patent: June 18, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Donald B. Hutcheson
  • Patent number: 5525373
    Abstract: A slide-bead coating technique utilizes an inclined slide surface terminating at a coating lip. A continuous liquid layer is supplied to the slide surface from a supply source so as to form a liquid bridge between the coating lip and a substrate disposed adjacent the coating lip. The substrate is conveyed past the lip and continuously depletes liquid from the liquid bridge onto the substrate. The technique includes supplying an air flow that impinges upon an upper surface of the liquid layer opposite the slide surface between the liquid supply source and the coating lip.
    Type: Grant
    Filed: October 18, 1994
    Date of Patent: June 11, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John T. Chandler
  • Patent number: 5526145
    Abstract: The present invention relates to color tuned holographic multicolor optical elements for use as multicolor transmission filters in liquid crystal displays and methods of making the elements. The element comprises at least first and second pixel volumes containing holographic mirrors and preferably third pixel volumes containing holographic mirrors. Each set of pixel volumes passes a different color wavelength band and reflects other color wavelength bands.
    Type: Grant
    Filed: June 10, 1994
    Date of Patent: June 11, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Andrew M. Weber
  • Patent number: 5509619
    Abstract: A printing equipment accessory, especially for making proof prints, with at least two rollers forming a roller nip, through which is passed at least one function component of a film from a supply roll, the film having an auxiliary component in addition to the function component, whereby the function component is transferable in the roller nip onto a base. Reuse of the auxiliary component of the film is simplified by such an accessory. The auxiliary component of the film forms a coreless roll.
    Type: Grant
    Filed: January 5, 1994
    Date of Patent: April 23, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Volker Struwe, Ladislaus Wojtanowitsch, Gregor Gehrer, Thomas Brotzner
  • Patent number: 5498880
    Abstract: An image capture panel includes a substrate layer of dielectric material having a top surface and a bottom surface. A plurality of sensors is arrayed in a matrix of rows and columns adjacent the top surface of the substrate layer. Each of the sensors has a switching device and a sensing element. A portion of the sensing element are really covers the switching device so as to be substantially coextensive therewith. Prefereably, the sensing element also extends over at least a part of the horizontal spacing and/or the vertical spacing which separates, respectively, each row of sensors and each column of sensors.
    Type: Grant
    Filed: January 12, 1995
    Date of Patent: March 12, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Denny L. Y. Lee, Lothar S. Jeromin, William Bindloss
  • Patent number: 5487801
    Abstract: The present invention relates to a pre-proof temperature controlling assembly associated with an off-press apparatus for laminating an image sheet to an image receiving substrate and, more particularly, for laminating a plurality of image sheets to the receiving substrate and then laminating a portion of the receiving substrate to a display sheet.
    Type: Grant
    Filed: November 23, 1994
    Date of Patent: January 30, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Michael P. Marion, David C. Otto
  • Patent number: 5474719
    Abstract: A method and apparatus, where high viscosity liquids, including pseudoplastic, plastic flow, and thixotropic liquids, as well as gels, semi-solid, and solid materials are viscosity reduced during coating and allowed to increase in viscosity during imaging steps, for use in Solid Imaging applications. Use of these materials and the apparatus improves coating uniformity and final object tolerances.
    Type: Grant
    Filed: February 14, 1991
    Date of Patent: December 12, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Roxy N. Fan, Mario Grossa, John A. Lawton
  • Patent number: 5464166
    Abstract: A method and apparatus for automatic roll transfer allows a film web winding onto a completed roll on a continuous film winder to be severed, and an incoming edge of the film web to be transferred onto a new core. A cylindrical housing having an external surface with an aperture extending therethrough is rotatably supported along a longitudinal axis thereof. A knife is held in a retracted position within the housing, the knife movably supported by the housing so as to allow the knife to move along a direction orthogonal to the longitudinal axis from the retracted position through the aperture to a cutting position. The apparatus includes elements to rotate the housing, to position the rotating housing adjacent to the film web, and to subsequently release the knife, thereby causing the knife to move from the retracted position to the cutting position and sever the film web.
    Type: Grant
    Filed: August 26, 1994
    Date of Patent: November 7, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: W. Mark Kirkpatrick, III, Richard A. Hughbanks
  • Patent number: 5458925
    Abstract: A slide-bead coating technique utilizes a dual slide that includes an upper slide surface connected to a lower slide surface terminating at a coating lip. A substrate is transported on a coating roll past the coating lip so as to form a liquid bead at a coating location disposed between the coating lip and the substrate. The coating location is positioned more than ten degrees (10.degree.) but no more than fifty degrees (50.degree.) circumferentially below a horizontal centerplane passing through an axis of rotation of the coating roll. The lower slide surface forms an angle of between eighty-five degrees (85.degree.) and ninety-five degrees (95.degree.) with the plane tangent to the surface of the substrate at the coating location.
    Type: Grant
    Filed: June 27, 1994
    Date of Patent: October 17, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Robert I. Hirshburg, Kostas N. Christodoulou
  • Patent number: 5441252
    Abstract: The instant invention provides a method for reliably separating a selected sheet from a spaced array of sheets transported on a conveyor. The invention continuously maintains vacuum on the conveyors, and uses selectively activated jets directed at the underside of the sheets to divert them for separating. The invention positively controls the destination of discrete, flexible sheets, such as photographic film, by continuously engaging the sheets with another conveyor during separating, sorting, shuffling or the like, as they travel in an array along a conveyor. Positive control of the sheets permits reliable, high speed separating of lightweight, flexible sheets.
    Type: Grant
    Filed: June 9, 1994
    Date of Patent: August 15, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: William J. Hommes
  • Patent number: 5439328
    Abstract: An apparatus for drilling holes in flexible materials used for flexographic printing includes a table which receives single sheets of flexible material which are to be drilled by a downwardly moveable drill. An optical mirror, TV-camera and monitor serve as viewing means to directly view the exact position on the surface of the material to be drilled. The optical mirror occupies a first position between the moveable drill and the flexible material, the first position being directly below the drill and directly above a target location on a single sheet. The optical mirror is retractable to a second position away from the path of the moveable drill, the optical mirror being replaced in the first position after the drilling is accomplished.
    Type: Grant
    Filed: August 24, 1993
    Date of Patent: August 8, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Kevin C. Haggerty, David L. Fox, John L. Fox, Richard O. Toles
  • Patent number: 5429908
    Abstract: A method for reducing curl in three dimensional computer generated models, created by the sequential exposure of adjacent layers of a photoformable composition, comprising exposing each layer twice, the first exposure being with an image modulated exposure further modulated to produce a series of isolated, anchored islets along the imaged areas, and the second exposure also being image modulated but without the additional modulation, so as to fuse the islets into a continuous solid image.
    Type: Grant
    Filed: April 12, 1993
    Date of Patent: July 4, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Bronson R. Hokuf, John A. Lawton
  • Patent number: 5391072
    Abstract: An apparatus for fabricating integral three-dimensional objects from successive layers of photoformable compositions by exposing the layers of the composition through a semi-permeable film that allows creation of release coatings on the side of the film facing the composition.
    Type: Grant
    Filed: February 3, 1992
    Date of Patent: February 21, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John A. Lawton, Jerome T. Adams
  • Patent number: 5386268
    Abstract: An exposure unit and method for imaging a photosensitive material includes a source of radiation for exposing the photosensitive material to actinic radiation such that the radiation strikes the photosensitive material at a plurality of angles of incidence, and apparatus for moving the radiation source relative to and in a plane parallel to the photosensitive material. The exposure unit also has a reflector for controlling (1) the proportion of (a) radiation having perpendicular angles of incidence to (b) radiation having non-perpendicular angles of incidence, such that the radiation having non-perpendicular angles is increased, and (2) the distribution of non-perpendicular angles of incidence.
    Type: Grant
    Filed: July 26, 1993
    Date of Patent: January 31, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Albert H. Ohlig, Steven W. Nelson, Robert J. Verbiar, Stephen Cushner