Multi-system weaving loom
AssigneeLindauer Dornier Gesellschaft mbH
InventorAdolf Linka
Life of this patent
Estimating the term…
Abstract
To compensate for difference in path length between a warp thread guide element and a reference position, for example adjacent a take-up beam (3) beyond the shed (8), a plurality of guide elements (34) are located between a run-on guide rod (31) and the shed forming heddles (7), the guide elements being controlled to move in synchronism with the heddles in a direction essentially along a central plane (8a) of the shed to compensate for lateral deflection of the threads as the shuttle moves through the shed, and the shed is closed after the shuttle (9) has passed therethrough. The thread guide elements (37) preferably are U-shaped structures, retaining a plurality of transverse rods (39), and deflected by a cam shaft (42, 47) in synchronism with shuttle movement and movement of the heddles.
Claims20
In a multi-system or multi-weaving unit weaving loom, a warp thread or yarn tension equalization system, said weaving loom having
- a warp beam (4) supplying a plurality of warp threads (5);
- shed forming means (7, 16, 21) receiving the threads, said shed forming means respectively deflecting the threads from a theoretical central plane (8a), said central plane being symmetrical with respect to the shed formed by the shed forming means;
- a goods take-up means (3);
- and
- thread guide means (31, 37) in the path of the warp threads from the warp beam to the shed forming means, deflecting the threads about a predetermined angle to the shed forming means for delivering of the threads at a predetermined tension;
- and
- wherein, in accordance with the invention,
- the thread guide means includes
- a plurality of independently movable deflection elements (37), each of which guides at least one warp thread (5);
- means (34) for movably supporting each of the deflection elements (37) for movement essentially in the direction of the central plane (8a) to thereby maintain the direction of guidance of the warp threads during movement of said deflection elements;
- and
- movable control means (42, 47) coupled to the deflection elements (37) and moving the deflection elements in a direction along said central plane (8a) to compensate for shift of the path length of the warp threads with respect to a reference position (8b) in advance of the goods take-up means (3) between opening and closing of the shed (8),
- said control means being synchronized for movement of the deflection elements in synchronism with the shed forming means (7, 16, 21),
- said control means including force applying means (42, 47) acting on the individual deflection elements in moving the deflection elements in synchronism with movement of the shed forming means (7, 16, 21), thereby maintaining the thread tension of said warp threads essentially at a predetermined value.
Dependencies are inferred from the claim text.