Stock material or miscellaneous articles – Longitudinally sectional layer of three or more sections – Next to unitary sheet of equal or greater extent
Patent
1996-07-10
1998-10-20
Thomas, Alexander
Stock material or miscellaneous articles
Longitudinally sectional layer of three or more sections
Next to unitary sheet of equal or greater extent
428 55, 428167, 428172, 52631, B32B 310, B32B 314, B32B 330
Patent
active
058243828
ABSTRACT:
A structural element made of a high impact sheet material, a resilient, semi-flexible core material, and a plurality of independent, preformed parallely-spaced rib members extending substantially across the width of said sheet material and fixedly attached thereto by an adhesive with said sheet material being flat, said plurality of rib members having adjacent, confronting side surfaces substantially parallel to one another, the forces created by bending of the structural element producing fractional detachment between at least some of said rib members and said sheet material being controlled by the width and height of said rib members and the distance between adjacent rib members and thereby determining the limit of bending of said structural element, thereby enabling a smooth surface of said high impact sheet material by preventing ripples and ridge lines therein with the bending of said structural element.
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patent: 4536427 (1985-08-01), Kohn
patent: 5232762 (1993-08-01), Ruby
patent: 5618601 (1997-04-01), Ruby
Paper Backers Lend Economical STrength in Furniture Production; Furniture & Cabinet Manufacturing; pp. 2-4; publication Oct. 1987.
Goodrich SPecialty Polymers & Chemicals Division; 5 pages; Dec. 1988.
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