A carpet having a shadow effect comprises a backing fabric having weft threads (S) and tension warp threads (S1, S2), further comprising pile warp threads (P) interlaced with the weft threads (S) of the backing fabric and forming pile elements, the weft threads (S) being provided in groups (G) of weft threads repeatedly appearing in a warp direction, each group (G) of weft threads providing a relative positioning of the weft threads (S) thereof relative to at least one tension warp thread (S1, S2), a weft thread (S) of a group (G) being either positioned on a pile side relative to a tension warp thread (S1, S2) or on a back side relative to this tension warp thread (S1, S2) in a respective relative positioning, a first group (G1) of weft threads having a first relative positioning of the weft threads (S) thereof and a second group (G2) having a second relative positioning of the weft threads (S) thereof different from the first relative positioning, wherein the first relative positioning and the second relative positioning provide a substantially mirror-symmetrical arrangement with respect to each other relative to a plane of symmetry (Sy1) extending in the weft direction, and/or wherein in the first relative positioning and the second relative positioning weft threads (S) positioned at a first group end region (E1) in the warp direction and weft threads (S) positioned at a second group end region (E2) in the warp direction have a different relative positioning with respect to at least one tension warp thread (S1, S2).

A carpet having a shadow effect comprises a backing fabric having weft threads (S) and tension warp threads (S1, S2), further comprising pile warp threads (P) interlaced with the weft threads (S) of the backing fabric and forming pile elements, the weft threads (S) being provided in groups (G) of weft threads repeatedly appearing in a warp direction, each group (G) of weft threads providing a relative positioning of the weft threads (S) thereof relative to at least one tension warp thread (S1, S2), a weft thread (S) of a group (G) being either positioned on a pile side relative to a tension warp thread (S1, S2) or on a back side relative to this tension warp thread (S1, S2) in a respective relative positioning, a first group (G1) of weft threads having a first relative positioning of the weft threads (S) thereof and a second group (G2) having a second relative positioning of the weft threads (S) thereof different from the first relative positioning, wherein the first relative positioning and the second relative positioning provide a substantially mirror-symmetrical arrangement with respect to each other relative to a plane of symmetry (Sy1) extending in the weft direction, and/or wherein in the first relative positioning and the second relative positioning weft threads (S) positioned at a first group end region (E1) in the warp direction and weft threads (S) positioned at a second group end region (E2) in the warp direction have a different relative positioning with respect to at least one tension warp thread (S1, S2).

A method for face-to-face weaving of two at least partially pile-free fabrics (I), (II) in which weft threads (101-104),(201-204) are inserted between warp threads (1a-14a,1b-14b) of warp thread systems with figure warp threads (1a-8a),(1b-8b) that are allocated to respective fabrics (I,II) and are either pattern-determining in that fabric or are incorporated therein, whereby at least one set (1a,1b), . . . (8a,8b) of two identical figure warp threads is provided per pair of neighbouring warp thread systems, while the two figure warp threads of each set belong to a different warp thread system (1a-14a), (1b-14b) and are allocated to a different fabric (I,II), so that each set of figure warp threads per pair of neighbouring warp thread systems provides a figure warp thread in both fabrics (I,II) to determine the pattern.

A method for face-to-face weaving of two at least partially pile-free fabrics (I), (II) in which weft threads (101-104),(201-204) are inserted between warp threads (1a-14a,1b-14b) of warp thread systems with figure warp threads (1a-8a),(1b-8b) that are allocated to respective fabrics (I,II) and are either pattern-determining in that fabric or are incorporated therein, whereby at least one set (1a,1b), . . . (8a,8b) of two identical figure warp threads is provided per pair of neighbouring warp thread systems, while the two figure warp threads of each set belong to a different warp thread system (1a-14a), (1b-14b) and are allocated to a different fabric (I,II), so that each set of figure warp threads per pair of neighbouring warp thread systems provides a figure warp thread in both fabrics (I,II) to determine the pattern.

A jacquard machine comprises a plurality of yarn moving elements and in association with each yarn moving element a yarn moving mechanism having an output cord connected to the yarn moving element, a plurality of setting bars extending substantially in a first direction corresponding to a weft direction and positioned adjacent to each other substantially in a second direction corresponding to a warp direction, each setting bar having two longitudinal end regions and a cooperation region arranged between the longitudinal end regions for the cooperation with a plurality of yarn moving mechanisms, a plurality of position adjustment bars extending substantially in the second direction, wherein in each one of the two longitudinal end regions of the setting bars two position adjustment bars are provided adjacent to each other, and a plurality of connecting means for connecting the setting bars to the position adjustment bars, wherein in each longitudinal end region of each setting bar one connecting means is provided such as to be connectable to either one of the two position adjustment bars arranged in a respective one of the longitudinal end regions of the setting bars.

A jacquard machine comprises a plurality of yarn moving elements and in association with each yarn moving element a yarn moving mechanism having an output cord connected to the yarn moving element, a plurality of setting bars extending substantially in a first direction corresponding to a weft direction and positioned adjacent to each other substantially in a second direction corresponding to a warp direction, each setting bar having two longitudinal end regions and a cooperation region arranged between the longitudinal end regions for the cooperation with a plurality of yarn moving mechanisms, a plurality of position adjustment bars extending substantially in the second direction, wherein in each one of the two longitudinal end regions of the setting bars two position adjustment bars are provided adjacent to each other, and a plurality of connecting means for connecting the setting bars to the position adjustment bars, wherein in each longitudinal end region of each setting bar one connecting means is provided such as to be connectable to either one of the two position adjustment bars arranged in a respective one of the longitudinal end regions of the setting bars.

A weaving method for the double-face weaving of pile fabrics wherein at least five different pile warp threads (12-19), (20-27) with a yarn number of between 6 and 10 Nm final and at least two tension warp threads (8),(9); (10,11) are provided for each warp thread system (100) and for each fabric (28), (29), wherein the weft threads (1,2), (2,3) of each fabric are divided over at least three levels, while the ground weave repeat runs over at least eight insertion cycles (I-VIII), wherein between 200 and 1000 warp thread systems per meter are provided, and at least 16 pile rows per cm are formed in the warp direction.

A weaving method for the double-face weaving of pile fabrics wherein at least five different pile warp threads (12-19), (20-27) with a yarn number of between 6 and 10 Nm final and at least two tension warp threads (8),(9); (10,11) are provided for each warp thread system (100) and for each fabric (28), (29), wherein the weft threads (1,2), (2,3) of each fabric are divided over at least three levels, while the ground weave repeat runs over at least eight insertion cycles (I-VIII), wherein between 200 and 1000 warp thread systems per meter are provided, and at least 16 pile rows per cm are formed in the warp direction.