US 11,746,537 B2
Floor board and method for manufacturing such floor boards
Dieter D'Hondt, Sint-andries (BE); and Aaron Shaw, High Point, NC (US)
Assigned to FLOORING INDUSTRIES LIMITED, SARL, Bertrange (LU)
Filed by Flooring Industries Limited, SARL, Bertrange (LU)
Filed on Jul. 13, 2021, as Appl. No. 17/374,431.
Application 17/374,431 is a continuation of application No. 16/808,745, filed on Mar. 4, 2020, granted, now 11,473,315.
Application 16/808,745 is a continuation of application No. 15/571,576, granted, now 10,655,338, issued on May 19, 2020, previously published as PCT/US2016/031170, filed on May 6, 2016.
Claims priority of provisional application 62/160,283, filed on May 12, 2015.
Prior Publication US 2021/0340777 A1, Nov. 4, 2021
Int. Cl. B32B 3/10 (2006.01); E04F 15/02 (2006.01); E04F 15/10 (2006.01)
CPC E04F 15/02038 (2013.01) [E04F 15/102 (2013.01); E04F 15/107 (2013.01); Y10T 428/24777 (2015.01)] 19 Claims
OG exemplary drawing
 
1. A method for manufacturing a floor board, said floor board comprising a decorative surface layer applied to a substrate, said method comprising:
providing a substrate material comprising MDF/HDF material;
applying a decorative surface layer to a top surface of said substrate material;
dividing said substrate material into planks having approximately the size of said floor board;
profiling a side edge of said planks; said MDF/HDF material being exposed at said side edge;
impregnating said side edge with an impregnation agent;
wherein said MDF/HDF material has a higher density region of at least 900 kg/m3, and
wherein said MDF/HDF material at the said side edge comprises a zone having a density which is at least 10 percent lower than 900 kg/m3,
wherein said impregnating of said side edge with the impregnation agent comprises spraying of said side edge while the floor board is transported on a transporting device.