Patent ID: 7160053

Claim:
A bamboo mat board element ( 10 ) with a constant dimension having a surface layer and a bottom layer construction formed with a projecting tenon ( 10 a ) at each of two adjacent sides and a concave mortise ( 10 b ) at each of two other adjacent sides for inter-tenoning said mat board element with neighboring mat board elements, the surface layer of said mat board element ( 10 ) being comprised of a plurality of mat board stuffs ( 11 ) wherein each of said mat board stuffs ( 11 ) includes a plurality of bamboo lumbers ( 110 ) having a parallel orientation forming a mat board stuff ( 11 ) having parallel stripes, said plurality of mat board stuffs ( 11 ) being arranged in different orientations, shapes and sizes on the surface of said mat board element ( 10 ) so as to form a plurality of patterns having parallel stripes, and wherein said bamboo lumbers ( 110 ) are disposed in said mat board stuffs ( 11 ) with a longitudinal cross section ( 110 a ) facing upward and peripheral face ( 110 b ) glued together arrangement, said longitudinal cross section ( 110 a ) substantially corresponding to a longitudinal cross section in the axial direction of a raw bamboo segment ( 1 ) and said peripheral face ( 110 b ) substantially corresponding to the peripheral face of said longitudinally sectioned raw bamboo segment ( 1 ), and said bottom layer of said mat board element ( 10 ) being comprised of a plurality of bottom board stuffs ( 12 ) wherein each of said bottom board stuffs ( 12 ) includes a plurality of bamboo lumbers ( 110 ) having a parallel orientation wherein said bamboo lumbers ( 110 ) are disposed in said bottom board stuff ( 12 ) with a peripheral face ( 110 b ) facing upward and longitudinal cross section ( 110 a ) glued together arrangement, said mat board stuff ( 11 ) and said bottom bottom board stuff ( 12 ) being glued and subsequently pressed together.