Leno cloth as well as method and weaving machine for production thereof

A method for producing a leno cloth having tie-up crossings in a plane extending parallel to a plane defined by centers of weft threads in said leno cloth, said method comprising the following steps:

• a) providing a first warp beam (7a) for supplying leno warp threads (3) to an interlacing point (16a),
• b) providing a second warp beam (7b) for supplying ground warp threads (1) to said interlacing point (16a),
• c) positioning said weft threads (2) onto said ground warp threads (1),
• d) tying-up said weft threads (2) and said ground warp threads (1) with said leno warp threads (3) to form crossings and
• e) feeding said leno warp threads (3) with a lower warp tension than a warp tension of said ground warp threads (1) to said interlacing point (16a) so that said leno warp threads (3) have a larger take-up into or higher volume in said leno cloth than said ground warp threads (1).

A loom for producing a leno cloth having tie-up crossings in a plane extending parallel to a plane defined by centers of weft threads in said leno cloth, said loom comprising

• a) a first warp beam (7a) with a first drive (8a) for supplying leno warp threads (3), and a second warp beam (7b) with a second drive (8b) for supplying ground warp threads (1),
• b) a rocking reed (12a) for guiding said leno warp threads (3) for the formation of an upper shed, and a standing reed (12b) for guiding said ground warp threads (1) for the formation of a lower shed,
• c) a sley (15) drive-connected to said rocking reed (12a), and a transmission with a drive shaft drive-connected to said standing reed (12b),
• d) a weft thread insertion apparatus for inserting said weft threads (2) into a loom shed formed by said upper shed of said leno warp threads (3) and by said lower shed of said ground warp threads (1),
• e) warp tension sensors (4, 26) for detecting warp tensions of said leno warp threads (3) and of said ground warp threads (1), and
• f) an arrangement responsive to said warp tension sensors (4, 26) for adjusting the warp tensions in such a manner that a leno warp thread tension is considerably lower than a ground warp thread tension and so that said leno warp threads have a higher take-up into or volume in said leno cloth (16) than said ground warp threads (1).