Patent ID: 7819141

Claim:
An industrial two-layer fabric comprising: upper side warps that are woven with upper side wefts configured to constitute an upper layer; lower side warps that are woven with lower side wefts configured to constitute an lower layer; and binding yarns that weave the upper layer and the lower layer, the binding yarns being either warp binding yarns or weft binding yarns, wherein: a first upper side weft, a second upper side weft, a third upper side weft, and a fourth upper side weft are arranged contiguously and repeatedly; the second upper side weft and the third upper side weft form a separation portion, a floating portion and an approach portion; each of the first upper side weft and the fourth upper side weft form a crimp portion; at the separation portion, each of a first set of three contiguously arranged warps, that include the upper side warp or the warp binding yarn, or alternatively the upper side warp and the warp binding yarn, forms a one weft long knuckle over the second upper side weft, a one weft long knuckle over the third upper side weft, and a one weft long knuckle over the second upper side weft, respectively whereby the second upper side weft is separated from the third upper side weft; at the floating portion, the second upper side weft and the third upper side weft are arranged to pass over a second set of two or more warps that include the upper side warp or the warp binding yarn, or alternatively the upper side warp and the warp binding yarn, two of the second sets of warps are arranged adjacent to both sides of the first set of the warps to form two floating portions at both sides of the separation portion; at the approach portion, which is arranged adjacent to and between the two floating portions, a first one of a third set of warps, which is either an upper side weft or a warp binding yarn, passes over the second upper side weft and the third upper side weft successively and a second one or two of the third set of warps arranged adjacent to the first one of the third set of warps pass over either one of the second upper side weft or the third upper side weft so that the second upper side weft and the third upper side weft approach to each other; and at the crimp portion, each of the first upper side weft and the fourth upper side weft passes over at least the first set of warps, the crimp portions formed by the first and fourth upper side wefts sandwich the separation portion.