Stock material or miscellaneous articles – Structurally defined web or sheet – Including aperture
Patent
1990-05-30
1992-04-14
Van Balen, William J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including aperture
156250, 156257, 428136, 428137, 428138, 428139, 428140, B32B 310, B32B 704
Patent
active
051047152
ABSTRACT:
An insulating board is formed of a low density insulating material, such as polystyrene foam. The board has apertures therein and a plurality of slots on its upper and its lower surfaces, the slots in the lower surface being offset from those in the upper surface. A high density material, such as gypsum or artificial resin or a cement fills the apertures and slots and extends over the upper and the lower surfaces of the board and, if desired, over it edges to form a composite sheet. Sheets of paper, plastic or metal may be fixed to the top and to the bottom of the composite sheet. A tile may be provided by affixing a planar sheet or the like to the top side of the composite sheet, the planar sheet, when in place, conforming to the upper surface of the composite sheet. A method of making the sheet involves bringing the board of low density material into contact with the material of higher density and allowing it to set or cure. The method of producing the composite sheet involves filling the apertures and slots on the insulating board with the high density material so as to cover at least one of the upper or lower surface thereof. The depth of the slots are at least slightly greater than the thickness of the board. Some or all of the apertures are defined by intersections between slots in the upper and lower surfaces of the board.
REFERENCES:
patent: 3649431 (1972-03-01), Parker
patent: 3712846 (1973-01-01), Daniels et al.
patent: 4039706 (1977-08-01), Tajima et al.
patent: 4599258 (1986-07-01), Hageman
patent: 4766024 (1988-08-01), Nath et al.
patent: 4835034 (1989-05-01), Cruz
Gaffey James R.
Van Balen William J.
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