Patents by Inventor David A. Scher

David A. Scher has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5867882
    Abstract: An apparatus and process for the manufacture of silk-screens is provided for use in the printing of halftones, e.g. in a four color printing process. The angle at which the mesh of a silk-screen should be relative to the screen frame to eliminate or at least minimize or localize moire' is predetermined for each of the color film separations. This angle is then carried to stretching apparatus for the woven fabric from which the silk-screens are to be made. The stretching appararatus has a table that is provided with a plurality of rotatable members. A screen frame is placed on each of the rotatable members and the rotable member is rotated to the angle determined by the pre-registration apparatus. The fabric is stretched to the desired tension and the screen frames having been provided at the desired angles are adhered to the stretched fabric, resulting in the mesh in each silk-screen being at the correct angle with respect to the screen frame.
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: February 9, 1999
    Assignee: Autoroll Machine Company, LLC
    Inventors: William M. Karlyn, David A. Scher, Robert E. Wesinger, Michael E. Bissel
  • Patent number: 5842413
    Abstract: Silk-screens of annular-shape are provided for the silk-screen printing of halftones on compact discs. The silk-screens are rotatably provided in a carrier so that the angle at which moire can be eliminated or at least minimized or localized for the printing of a particular color can be determined. Following the determination of that angle for each of the colors to be printed, the screens are each then provided with photosensitive emulsion, exposed to light, and washed. The silk-screens are then placed in another carrier at the same angle as before determined for the elimination or at least the minimization or localization of moire, this carrier being capable of being placed directly into the nest of a print head of a conventional silk-screen printing machine.
    Type: Grant
    Filed: October 10, 1997
    Date of Patent: December 1, 1998
    Assignee: Autoroll Machine Company, LLC
    Inventors: William M. Karlyn, David A. Scher
  • Patent number: 5752441
    Abstract: Silk-screens of annular-shape are provided for the silk-screen printing of halftones on compact discs. The silk-screens are rotatably provided in a carrier so that the angle at which moire can be eliminated or at least minimized or localized for the printing of a particular color can be determined. Following the determination of that angle for each of the colors to be printed, the screens are each then provided with photosensitive emulsion, exposed to light, and washed. The silk-screens are then placed in another carrier at the same angle as before determined for the elimination or at least the minimalization or localization of moire, this carrier being capable of being placed directly into the nest of a print head of a conventional silk-screen printing machine.
    Type: Grant
    Filed: September 3, 1996
    Date of Patent: May 19, 1998
    Assignee: Autorohl Machine Company, LLC.
    Inventors: William M. Karlyn, David A. Scher
  • Patent number: 5740732
    Abstract: Silk-screens of annular-shape are provided for the silk-screen printing of halftones on compact discs. The silk-screens are rotatably provided in a carrier so that the angle at which molre can be eliminated or at least minimized or localized for the printing of a particular color can be determined. Following the determination of that angle for each of the colors to be printed, the screens are each then provided with photosensitive emulsion, exposed to light, and washed. The silk-screens are then placed in another carrier at the same angle as before determined for the elimination or at least the minimalization or localization of molre, this carrier being capable of being placed directly into the nest of a print head of a conventional silk-screen printing machine.
    Type: Grant
    Filed: December 17, 1996
    Date of Patent: April 21, 1998
    Assignee: AutoRoll Machine Company, LLC
    Inventors: William M. Karlyn, David A. Scher
  • Patent number: 5732624
    Abstract: Silk-screens of annular-shape are provided for the silk-screen printing of halftones on compact discs. The silk-screens are rotatably provided in a carrier so that the angle at which moire can be eliminated or at least minimized or localized for the printing of a particular color can be determined. Following the determination of that angle for each of the colors to be printed, the screens are each then provided with photosensitive emulsion, exposed to light, and washed. The silk-screens are then placed in another carrier at the same angle as before determined for the elimination or at least the mimimalization or localization of moire, this carrier being capable of being placed directly into the nest of a print head of a conventional silk-screen printing machine.
    Type: Grant
    Filed: April 22, 1996
    Date of Patent: March 31, 1998
    Assignee: Autoroll Machine Company, LLC
    Inventors: William M. Karlyn, David A. Scher
  • Patent number: 5562030
    Abstract: An apparatus and process for the manufacture of silk-screens is provided for use in the printing of halftones, e.g. in a four color printing process. The angle at which the mesh of a silk-screen should be relative to the screen frame to eliminate or at least minimize or localize moire' is predetermined for each of the color film separations. This angle is then carried to stretching apparatus for the woven fabric from which the silk-screens are to be made. The stretching appararatus has a table that is provided with a plurality of rotatable members. A screen frame is placed on each of the rotatable members and the rotable member is rotated to the angle determined by the pre-registration apparatus. The fabric is stretched to the desired tension and the screen frames having been provided at the desired angles are adhered to the stretched fabric, resulting in the mesh in each silk-screen being at the correct angle with respect to the screen frame.
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: October 8, 1996
    Assignee: Autoroll Machine Corporation
    Inventors: William M. Karlyn, David A. Scher, Robert E. Wesinger, Michael E. Bissel