Patent ID: 8900393

Claim:
method of producing a laminated board for use in the production of large displays, show-cards, graphic panels and the like, comprising: embossing first and second plies to produce raised projections and recessed depressions in each of the first and second plies; placing adhesive on the raised projections of each of the first and second embossed plies; bringing the first and second plies together to be attached by the raised projections; applying pressure to the tops of the raised projections to cause the first and second embossed plies to adhere together to form a composite ply; and adhering first and second flat outer plies simultaneously onto first and second sides of the composite ply, wherein the raised projections and recessed depressions in each of the first and second plies are produced in an alternating symmetrical manner along both a length and a width of the first and second plies, and wherein the recessed depressions in each of the first and second plies are aligned during the step of bringing the first and second plies together to form projections extending from the first and second sides of the composite ply, and wherein the first and second flat outer plies are adhered to the projections extending from the first and second sides of the composite ply.