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AssigneeNahmaschinenfabrik Emil Stutznacker GmbH & Co. KG
InventorHarmut Klapp
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A method for operating a chain stitch sewing machine and a chain stitch sewing machine, the chain stitch sewing machine having a pair of sewing members comprising a needle which pierces a sewing material and a gripper disposed below a sewing material rest, which can be moved along a movement path, where an upper thread is guided with the needle through the sewing material resting on the sewing material rest, which is linked to a lower thread. The lower thread is fed to a retaining element and is held in said element that is moved with regard to its direction of movement and/or speed of movement to the sewing material rest according to a movement path of a pivoting movement of the gripper in particular along a circular-arc-segment-shaped movement path.
A method for operating a double chain stitch sewing machine, which comprises a pair of sewing members comprising a needle which pierces a sewing material and a gripper disposed below a sewing material rest, which can be moved along a movement path, wherein an upper thread is guided with the needle through the sewing material resting on the sewing material rest, which is linked to a lower thread, characterized in that the lower thread is fed as required to a retaining element and is held in said element, that is moved with regard to its direction of movement and/or speed of movement to the sewing material rest according to a movement path of a pivoting movement of the gripper, in particular along a circular-arc-segment-shaped movement path and in that the lower thread is arranged tensioned between gripper and retaining element.
A double chain stitch sewing machine, which comprises a pair of sewing members comprising a needle which pierces a sewing material and a gripper disposed below a sewing material rest, which can be moved along a movement path, wherein the needle guides an upper thread through the sewing material resting on the sewing material rest and the upper thread is linked to a lower thread, characterized by a retaining element for holding the lower thread as required in a tensioned way between gripper and retaining element which retaining element can be moved with regard to its direction of movement and/or speed of movement to the sewing material rest according to a movement path of a pivoting movement of the gripper, in particular along a circular-arc-segment-shaped movement path.
Dependencies are inferred from the claim text.