Abstract: The embrodiery machine shuttle, preferably made of plastic, has two main components, namely a base plate and a housing which can be fastened on the base plate. The base plate forms the slide face of the shuttle. For this reason the elements required for thread tension are placed in the interior of the shuttle. A bobbin is maintained in the correct position by a bobbin mounting and a part thereof forms a rear thread guide element. The thread is drawn off the bobbin and routed to a thread hole through and around the thread guide element between an upper pressure plate and a lower counterpressure spring. The thread tension can be easily adjusted from the outside with a slide. The shuttle according to the present invention is suited, together with a corresponding shuttle processing machine, for automatic emptying, cleaning, filling with a fresh bobbin, threading and setting the thread tension.

Abstract: A multiple-end weft-insertion process which is capable of achieving extremely high yarn density which is uniform in plys of structural fabrics is disclosed, making use of conventional machinery and systems. Yarn is transferred from a shuttle to yarn transfer elements spaced a sufficient distance apart to avoid damage to the yarn, and then transferred to yarn holding elements. Each successive pass of the shuttle is adjusted by moving the yarn transfer element parallel to the holding elements, so as to overlap each band deposited by the shuttle. The amount of movement necessary to achieve any desired density is calculated according to established parameters.

Abstract: An assembly for adjustment of lower thread tension for a sewing machine having a loop taker and a bobbin carrier which is held by the loop taker and carries a bobbin loaded with the lower thread. The assembly comprises a base plate and a resilient member, one end of which is connected to the base plate. A tension is given to the lower thread while the thread is passed between the base plate and the resilient member. A substantially L-shaped presser element having an upper vertical and a lower horizontal portion is provided for the assembly and is turnably attached to an inner wall of the bobbin carrier. The vertical portion of the presser element is adapted to press a free end of the resilient member against the base plate. A permanent magnet or electromagnet acts on the horizontal portion of the presser element without contact thereto.