Multi-needle knotted-stitch quilting machine with lower stitching elements having rotating hooks

A multi-needle knotted-stitch quilting machine with lower stitching elements including rotating hooks, the machine comprising:

• an inlet assembly for the controlled feed of textile material (11) to be quilted,
• a stitching assembly including upper stitching elements (12) and lower stitching elements and an outlet assembly to collect the quilted product (19),
• the upper stitching elements including stitching needles and at least two parallel needle-carrier bars (13), the needle-carrier bars (13) being arranged lengthwise and each said needle-carrier bar (13) supporting the stitching needles (24) to have the stitching needles (24) mounted spaced lengthwise on respective said needle-carrier bars,
• the lower stitching elements having rotating hooks (17) organized in longitudinal rows mating with the position of a respective said needle-carrier bar (13), the position of each needle (24) corresponding with the position of a respective rotating hook (17), the machine including the rotating hooks (17) mounted spaced lengthwise at a defined assembly distance on respective faces (116a, 116b) of at least two longitudinal hook-carrier bars (16a, 16b), wherein at least one of the hook-carrier bars (16a, 16b) being supported for displacement lengthwise with respect to the other bar (16b, 16a) by a value (D) equal to a desired sub-multiple of the assembly distance of the rotating hooks (17) on each respective bar (16a, 16b).