Method for weaving pile fabrics with variable pile height

Method for weaving pile fabrics having at least two different pile heights in a same pile row on a weaving machine of the gripper-Axminster type, comprising at least two pile yarn carriers (2, 3) separately controlled for the selection, according to a pattern to be woven, of one or several pile yarns (4) being presented, in a position selected, to a gripper (1) driven by an oscillating gripper shaft, provided to draw the selected pile yarn (4) off the pile yarn carrier (2, 3), throughout a length desired, by rotating the gripper shaft, the said weaving machine furthermore comprising a cutting device (6) to cut through the pile yarns (4) selected after the selection, and this pile yarn (4) being inserted into the fabric, after the pile warp yarn (4) having been cut through, characterized in that the method is comprising the following stages:

• bringing the one or several pile yarn carriers (3) out of reach of the cutting device (6) by means of their separate drives;
• cutting through, by means of a first cutting motion of the cutting device (6) , the pile yarns (4) selected which are in the pile yarn carriers (2), which are positioned in the reach of the cutting device (6) in order to obtain pile yarns having a first pile height;
• returning, by means of their separate drives, at least a first part of the pile yarn carriers (3) into their positions in which they will present the pile yarn selected in the position (5) selected;
• performing an additional rotation of the gripper shaft, drawing the pile yarns selected, which are situated in the in the said first part of the pile yarn carriers (3), further off these pile yarn carriers;
• cutting through, by means of a second cutting motion of the cutting device (6), the pile yarns having been drawn off further, in order to obtain pile yarns with a second pile height.