Patents by Inventor Thomas A. Holmberg

Thomas A. Holmberg 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).

  • Lay flat book sheets
    Patent number: 8668228
    Abstract: A sheet stock having a flexible hinge area is described. The sheet stock includes a substrate having an opening and gap stiffener, and a flexible film covering the opening and defining a flexible hinge area in the region of the opening and gap stiffener covered by the film. Methods for producing sheet stock having a flexible hinge area are also described. The sheet stock may be used in printing, binding, and in other applications.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: March 11, 2014
    Assignee: Holmberg Company, Inc.
    Inventor: Thomas A. Holmberg
  • LAY FLAT BOOK SHEETS
    Publication number: 20080220211
    Abstract: A sheet stock having a flexible hinge area is described. The sheet stock includes a substrate having an opening and gap stiffener, and a flexible film covering the opening and defining a flexible hinge area in the region of the opening and gap stiffener covered by the film. Methods for producing sheet stock having a flexible hinge area are also described. The sheet stock may be used in printing, binding, and in other applications.
    Type: Application
    Filed: March 5, 2008
    Publication date: September 11, 2008
    Inventor: Thomas A. Holmberg
  • Pad of paper sheets with pressure-sensitive attachment edge portion and method of making the same
    Patent number: 4590109
    Abstract: A pad of bound-together individual sheets having a reusable pressure-sensitive adhesive applied to the bound-together edge portion thereof and provided with a removable attachment strip to facilitate the binding of the sheets into a convenient pad for removal and use, and method of making the same.
    Type: Grant
    Filed: March 20, 1985
    Date of Patent: May 20, 1986
    Assignee: The Holmberg Company
    Inventor: Thomas A. Holmberg
  • Continuous sheet with perforated tear-off driving edge and recessed reinforced inner edge
    Patent number: 4551374
    Abstract: An improved continuous sheet having tear-off perforated edge portions for use with toothed driving wheels (tractor drive transfer mechanism) adapted to mesh with the perforations to advance the continuous sheet in accordance with word processing and printing equipment, said sheet having a recessed, reinforced inner edge portion adjacent to the tear-off line of the perforated edge portion.
    Type: Grant
    Filed: June 20, 1984
    Date of Patent: November 5, 1985
    Assignee: The Holmberg Company
    Inventor: Thomas A. Holmberg
  • Paper sheets having recessed pressure-sensitive glued edge with a removable strip
    Patent number: 4447481
    Abstract: A paper sheet having a recess along one edge thereof with a non-drying adhesive applied in said recess and a removable protective strip covering said adhesive, the combined thickness of said adhesive and strip being substantially equal to the depth of said recess to provide a sheet of uniform thickness having a protected pressure-sensitive adhesive edge.
    Type: Grant
    Filed: July 11, 1983
    Date of Patent: May 8, 1984
    Assignee: The Holmberg Company
    Inventors: Albert E. Holmberg, Thomas A. Holmberg