Patent ID: 9616650
Date: 2017-04-11
CPC Classifications: B32B,Y10T

Claim:
1. A method of fabricating a composite engineered wood material floor board comprised of a top wood layer secured to a wood material substrate layer by an adhesive binder, said method comprising the steps of: i) selecting a top wood layer from a top surface quality wood material having a thickness of between 1 mm and 8 mm, ii) selecting a wood material substrate layer having a minimum thickness of 6 mm, including selecting a thickness ratio between the top wood layer thickness and the wood material substrate layer thickness of between 1:1 and 1:10, iii) bonding said top wood layer to said wood material substrate layer by said adhesive binder, and iv) forming a plurality of transverse rectangular spaced-apart grooves in a bottom surface of said wood material substrate layer with said grooves extending transverse to said top wood layer and the top wood layer grain direction, said grooves defining opposed, spaced parallel side walls and a flat bottom wall; the ratio between the depth of said grooves and the thickness of said wood material substrate layer having an impact on telegraphy of said grooves in said top wood layer; said grooves having a width of between 1 mm to 4 mm, and wherein said grooves enhance the flexibility of said composite engineered wood material piece while substantially eliminating the effects of telegraphy of said grooves on the top finished surface of said top wood layer; and wherein said grooves are spaced-apart by a distance of 25.4 mm to 50.8 mm.