Method for face-to-face weaving of shadow velours

Abstract

A method for face-to-face weaving of shadow velours fabrics in which two velours fabrics are woven with pile forming pile yarn tufts having a pre-determined orientation, each velours fabric having pile zones with a different aspect, because their pile yarn tufts have a different orientation, in order to form a pre-determined figure on each velours fabric and in which overlapping pile zones, having differently oriented pile yarn tufts are formed on the pile faces, facing one another, in parts ( 31 ), ( 32 ), ( 33 ), ( 34 ), ( 35 ), ( 36 ) of the face-to-face fabric, so that the projection of each figure produces a figure on the opposite pile face, which is different from the figure formed on the other pile face. This method makes it possible to determine the figures of the two velours fabrics independently of one another. If on the pile faces, facing each other, figures are formed, which when projected on the opposite pile face, are the mirror images of the figures formed on the other pile face, it is possible to obtain identical asymmetrical figures on both fabrics.

1 . Method for face-to-face weaving of shadow velours fabrics where two backing fabrics ( 19 ), ( 20 ) are woven above one another, when the pile yarns ( 1 ), ( 6 ) are interlaced alternately in the one and in the other backing fabric and then cut through between the backing fabrics ( 19 ), ( 20 ), so that two velours fabrics are woven with pile forming pile yarn tufts having a pre-determined orientation on the pile faces, facing each other, and so that each velours fabric has at least one first pile zone and at least one second pile zone, the pile yarn tufts of which have a first and a second orientation respectively, which is different, in order to form a pre-determined figure on each velours fabric, characterized in that the orientation of the pile yarn tufts is determined in such a manner that on the faces of the velours fabrics facing each other, at least one pile zone of the one velours fabric and a least a second pile zone of the other velours fabric are overlapping, so that the projection of each figure on the opposite pile face produces a figure, which is different from the figure formed on the other pile face;  
     
     
         2 . Method for face-to-face weaving of shadow velours fabrics according to  claim 2  characterized in that the orientation of the pile yarn tufts is determined in such a manner that the projection of each figure on the opposite pile face produces a figure that is the mirror image of the figure formed on that other pile face, with respect to the axis, which is parallel with the fell of the fabric.  
     
     
         3 . Method for face-to-face weaving of shadow velours fabrics according to  claim 1  or  2 , characterized in that each shadow velours fabric moreover has at least also one third pile zone, the pile yarn tufts of which have a third orientation that is different from the first and second orientations in order to form, together with each first and second pile zone, a pre-determined figure on each velours fabric, and in that the orientation of the pile yarn tufts is determined in such a manner that at least one first pile zone and at least one third pile zone overlap and/or at least one second pile zone and at least one third pile zone are overlapping on the velours fabrics facing each other.  
     
     
         4 . Method for face-to-face weaving of shadow velours fabrics according to anyone of the preceding claims, characterized in that beforehand a representation ( 42 ) is made of the pile faces of the velours fabrics situated above one another, in which in different places of that representation it is symbolically indicated which orientation the pile yarn tufts should have in the corresponding places of the upper and lower velours fabrics, situated above one another, in order to form the pre-determined figures.  
     
     
         5 . Method for face-to-face weaving of shadow velours fabrics according to  claim 4 , characterized in that the said schematic representation is a card design ( 42 ) with symbolic indications (A to D) by means of a colour code.  
     
     
         6 . Method for face-to-face weaving of shadow velours fabrics according to  claim 4  or  5 , characterized in that in the said representation ( 42 ), four different symbolic indications (A),(B),(C),(D) are used, in the following situations respectively: 
 a. If the pile yarn tufts in the upper and the lower fabric should have a same first orientation,  
 b. If the pile yarn tufts in the upper velours fabric should have a first orientation and those in the lower velours fabric should have a second orientation,  
 c. If the pile yarn tufts in the upper velours fabric should have a second orientation and those in the lower velours fabric should have a first orientation,  
 d. If the pile yarn tufts in the upper velours fabric and in the lower velours fabric should have a same second orientation,  
 
     
     
         7 . Method for face-to-face weaving of shadow velours fabrics according to  claim 4  or  5 , characterized in that in the said representation ( 42 ) nine different symbolic indications (A to D) are used, in the following situations respectively: 
 a. If the pile yarn tufts in the upper and the lower fabric should have a same first orientation,  
 b. If the pile yarn tufts in the upper and the lower fabric should have a same second orientation,  
 c. If the pile yarn tufts in the upper and the lower fabric should have a third orientation,  
 d. If the pile yarn tufts in the upper velours fabric should have a first orientation and in the lower velours fabric a second orientation,  
 e. If the pile yarn tufts in the upper velours fabric should have a first orientation and in the lower velours fabric a third orientation,  
 f. If the pile yarn tufts in the upper velours fabric should have a second orientation and in the lower velours fabric a first orientation.  
 g. If the pile yarn tufts in the upper velours fabric should have a second orientation and in the lower velours fabric a third orientation.  
 h. If the pile yarn tufts in the upper velours fabric should have a third orientation and in the lower velours fabric a first orientation.  
 i. If the pile yarn tufts in the upper velours fabric should have a third orientation and in the lower velours fabric a second orientation.  
 
     
     
         8 . Method for face-to-face weaving of shadow velours fabrics according to anyone of the preceding claims, characterized in that the said different orientations are an orientation standing upright, an orientation slanting to the left in the warp direction or an orientation slanting to the right in the chain direction.  
     
     
         9 . Method for face-to-face weaving of shadow velours fabrics according to anyone of the  claims 4  to  8 , characterized in that a weave is associated with each symbolic indication (A to D) in the said representation ( 42 ), which determines the course of the warp chains ( 1 - 5 ), ( 6 - 10 ) of at least one warp yarn system comprising a pile yarn ( 1 ), ( 6 ), with respect to a number of successively inserted weft yarns ( 11 - 14 ), ( 15 - 18 ), in order to weave two backing fabrics ( 19 ), ( 20 ) from warp yarns ( 1 - 5 ), ( 6 - 10 ) and weft yarns ( 11 - 14 ), ( 15 - 18 ) and giving the pile yarn tufts of the said pile yarn ( 1 ), ( 6 ) in these backing fabrics ( 19 ), ( 20 ) the orientations indicated by the symbolic indication (A to D) concerned.  
     
     
         10 . Method for face-to-face weaving of shadow velours fabrics according to anyone of the preceding claims, characterized in that a number of warp yarn systems is provided comprising a pile yarn ( 1 ), ( 6 ) and for each velours fabric a tension warp yarn ( 2 ), ( 4 ); ( 7 ), ( 9 ) and a binding warp yarn ( 3 ), ( 5 ); ( 8 ), ( 10 ), in that weft yarns ( 11 - 13 ), ( 15 - 17 ) are inserted between the yarns ( 1 - 5 ), ( 6 - 10 ) of each warp yarn system, so that two backing fabrics ( 19 ), ( 20 ) are woven with respective tension warp yarns ( 2 ), ( 7 ); ( 4 ), ( 9 ) and weft yarns ( 11 - 13 ), ( 15 - 17 ) interlaced by binding warp yarns ( 3 ), ( 5 ); ( 8 ), ( 10 ), whereas pile yarns ( 1 ), ( 6 ) are interlaced in the upper backing fabric ( 19 ) alternately over a group of three successive weft yarns ( 11 - 13 ) and over a group of three successive weft yarns ( 14 - 17 ) in the lower backing fabric ( 20 ), using a {fraction (3/6)}-W-weave, and are running to the other backing fabric, from each backing fabric ( 19 ), ( 20 ) between the third weft yarn ( 13 ), ( 17 ) of a group and the first weft yarn ( 11 ), ( 15 ) of the next group, and in that for each warp yarn system the respective positions of the weft yarns ( 11 - 13 ), ( 15 - 17 ) of each group with respect to the tension warp yarns ( 2 ), ( 7 ); ( 4 ), ( 9 ), for each velours fabric are chosen from the following possibilities in function of the orientations desired for the pile yarn tufts: 
 a. in order to obtain pile yarn tufts standing upright in the upper and the lower velours fabric: positions over, under and over in the upper velours fabric, and positions under, over and under in the lower velours fabric;    b. in order to obtain an orientation of the pile yarn tufts directed slantwise to the left in the upper and the lower velours fabric: positions under, under and over in the upper velours fabric, and positions over, over and under in the lower velours fabric;    c. in order to obtain an orientation of the pile yarn tufts directed slantwise to the right in the upper and the lower velours fabric: positions over, under and under in the upper velours fabric, and positions under, over and over in the lower velours fabric;    d. in order to obtain an orientation of the pile yarn tufts directed slantwise to the left and slantwise to the right respectively in the upper and the lower velours fabric: positions under, under and over in the upper velours fabric, and positions under, over and over in the lower velours fabric;    e. in order to obtain an orientation of the pile yarn tufts directed slantwise to the left and slantwise to the right respectively in the upper and the lower velours fabric: positions over, under and over in the upper velours fabric, and positions over, over and under in the lower velours fabric;    f. in order to obtain an orientation of the pile yarn tufts directed slantwise to the left and standing upright respectively in the upper and the lower velours fabric: the positions under, under and over in the upper velours fabric, and the positions under, over and under in the lower velours fabric respectively;    g. in order to obtain an orientation of the pile yarn tufts directed slantwise to the right and standing upright respectively in the upper and the lower velours fabric: the positions over, under and under in the upper velours fabric, and the positions under, over and under in the lower velours fabric respectively;    h. in order to obtain pile yarn tufts standing upright and an orientation directed slantwise to the left of the pile yarn tufts respectively in the upper and the lower velours fabric: the positions over, under and over in the upper velours fabric, and the positions over, over and under in the lower velours fabric respectively;    i. in order to obtain pile yarn tufts standing upright and an orientation directed slantwise to the right respectively of the pile yarn tufts respectively in the upper and the lower velours fabric: the positions over, under and over in the upper velours fabric, and the positions under, over and over in the lower velours fabric respectively;    
     
     
         11 . Method for face-to-face weaving of shadow velours fabrics according to anyone of the preceding claims, characterized in that a number of warp yarn systems is provided comprising a pile yarn ( 1 ), ( 6 ) and for each velours fabric a tension warp yarn ( 2 ), ( 4 ); ( 7 ), ( 9 ) and a binding warp yarn ( 3 ), ( 5 ); ( 8 ), ( 10 ), in that weft yarns are inserted between the yarns ( 1 - 5 ), ( 6 - 10 ) of each warp yarn system, so that two backing fabrics ( 19 ), ( 20 ) are woven with tension warp yarns ( 2 ), ( 7 ); ( 4 ), ( 9 ) and weft yarns ( 11 - 14 ), ( 15 - 18 ) interlaced by binding warp yarns ( 3 ), ( 8 ); ( 5 ), ( 10 ), while pile yarns ( 1 ), ( 6 ) are interlaced in the upper backing fabric ( 19 ) alternately over a group of four successive weft yarns ( 11 - 14 ) in the upper backing fabric ( 19 ) and over a group of four successive weft yarns ( 15 - 18 ) in the lower backing fabric ( 20 ), using a {fraction (4/8)}-W-weave and from each backing fabric ( 19 ), ( 20 ) between the fourth weft yarn ( 14 ), ( 18 ) of a group and the first weft yarn ( 11 ), ( 15 ) of the next group are running to the other backing fabric, and in that for each warp yarn system the respective positions of the four successive weft yarns ( 11 - 14 ), ( 15 - 18 ) of each group with respect to the tension warp yarns ( 2 ), ( 7 ); ( 4 ), ( 9 ), for each velours fabric are chosen from the following possibilities in function of the orientations desired for the pile yarn tufts: 
 a. in order to obtain pile yarn tufts standing upright in the upper and the lower velours fabrics: positions over, under, under and over in the upper velours fabric, and positions under, over, over and under in the lower velours fabric;    b. in order to obtain an orientation of the pile yarn tufts directed slantwise to the left in the upper and the lower velours fabric: positions under, under, over and over in the upper velours fabric, and positions over, over, under and under in the lower velours fabric;    c. in order to obtain an orientation of the pile yarn tufts directed slantwise to the right in the upper and the lower velours fabric: positions over, over, under and under in the upper velours fabric, and positions under, under, over and over in the lower velours fabric;    d. in order to obtain an orientation of the pile yarn tufts directed slantwise to the left and slantwise to the right respectively in the upper and the lower velours fabric: positions under, under, over and over in the upper velours fabric, and positions under, under, over and over in the lower velours fabric;    e. in order to obtain an orientation of the pile yarn tufts directed slantwise to the right and slantwise to the left respectively in the upper and the lower velours fabric: positions over, over, under and under in the upper velours fabric, and positions over, over, under and under in the lower velours fabric;    f. in order to obtain an orientation of the pile yarn tufts directed slantwise to the left and standing upright respectively in the upper and the lower velours fabric: the positions under, under, over and over in the upper velours fabric, and the positions under, over, over and under in the lower velours fabric respectively;    g. in order to obtain an orientation of the pile yarn tufts directed slantwise to the right and standing upright respectively in the upper and the lower velours fabric: the positions over, over, under and under in the upper velours fabric, and the positions under, over, over and under in the lower velours fabric respectively;    h. in order to obtain pile yarn tufts standing upright and an orientation of the pile yarn tufts directed slantwise to the left respectively in the upper and the lower velours fabric: the positions over, under, under and over in the upper velours fabric, and the positions over, over, under and under in the lower velours fabric respectively;    i. in order to obtain pile yarn tufts standing upright and an orientation of the pile yarn tufts directed slantwise to the right respectively in the upper and the lower velours fabric: the positions over, under, under and over in the upper velours fabric, and the positions under, under, over and over in the lower velours fabric respectively;    
     
     
         12 . Method for face-to-face weaving of shadow velours fabrics according to  claim 9 , characterized in that with each symbolic indication (A to D) in the said representation ( 42 ) a weave is associated, having one of the possibilities according to  claim 13  or a weave having one of the possibilities of  claim 14 , in which for these weaves that option is chosen, which provides the orientations of the pile yarn tufts indicated by the symbolic indication (A to D) concerned.  
     
     
         13 . Method for face-to-face weaving of shadow velours fabrics according to anyone of the  claims 4  to  12 , characterized in that the said representation ( 42 ) is made up by: 
 making a first auxiliary representation ( 40 ) of the pile face of the one velours fabric, in which in various places of that representation it is symbolically indicated which orientation the pile yarn tufts in the corresponding places of the pile face should have in order to form the pre-determined figure on the one velours fabric;  
 making a second auxiliary representation ( 41 ) of a pile face, which is the mirror image of the pile face of the one velours fabric, with respect to an axis coinciding with a fell of the fabric, in which in various places of that representation it is indicated symbolically which orientation the pile yarn tufts should have in the corresponding places of that pile face in order to form the mirror image,  
 placing above one another or representing the two auxiliary representations ( 40 ), ( 41 ) on one another and on the basis of this arrangement or representation to determine which orientations the pile yarn tufts should have in the corresponding places situated above one another of the upper and lower velours fabrics, and  
 applying a different symbolic indication to the said representation ( 42 ) for each different combination of orientations of the pile yarn tufts to be realized above one another.  
 
     
     
         14 . Method for face-to-face weaving of shadow velours fabrics according to anyone of the  claims 2  to  13 , characterized in that, by means of a computer, on the basis of orientations of pile yarn tufts on the one fabric, the orientations of the pile yarn tufts on the other fabric can be determined automatically, which are needed to obtain on the fabrics the respective figures, which when projected on the opposite pile face will produce the mirror image of the figure formed on the other pile face.  
     
     
         15 . Method for face-to-face weaving of shadow velours fabrics according to claims  4  and  14 , characterized in that the said representation ( 42 ) is made automatically by means of a computer on the basis of an auxiliary representation ( 40 ), ( 41 ) of the pile face of one of the two fabrics, in which in various places of this auxiliary representation ( 40 ), ( 41 ) it is symbolically indicated which orientation the pile yarn tufts in the corresponding places of the pile face should have in order to form the pre-determined figure on that velours fabric.