Vertical full-rotation shuttle, stitches made by vertical full-rotation shuttle and stitch forming method
AssigneeMicrocore Co.,Ltd.
InventorSo-dae KANG
Life of this patent
Estimating the term…
Abstract
The present invention relates to a vertical full-rotation shuttle, which leads a feed-side string portion of a needle thread loop to be wound around and hooked to a bobbin thread from one side of a bobbin case to the other side thereof according to the rotation of a hook part, and leads a stitch-side string portion of a needle thread to the surface of the bobbin case at one side of the bobbin case, such that the feed-side string portion of the needle thread turns the bobbin thread around and the needle thread loop jumps over the bobbin case so as to form complete stitches
Claims4
A vertically fully rotating shuttle comprising:
- a fixed housing (100);
- a hook body (300) rotatably installed in the housing (100) to rotate about a rotational axis vertical to a travelling path of a needle reciprocating;
- a bobbin case base (700) inserted into the hook body (300) not to rotate about the hook body (300);
- and
- a bobbin (400), around which bobbin thread (34) is wound, detachably mounted to the bobbin case base (700);
- wherein the hook body (300) comprises a hook (310);
- wherein the hook (310) is disposed at the other side of the housing (100) rather than a needle (35), penetrates and captures a loop of a needle thread (36) at the upstream in the rotational direction of the hook (310) prior to a bobbin thread (34), a feeding thread portion (36a) of the needle thread (36) turns around the bobbin thread (34) such that the loop of the needle thread jumps with respect to the bobbin case base (700).
A stitch formed by a needle thread of a needle provided in a sewing machine or an embroidering machine and moving up and down, and by a bobbin thread provided in a vertically fully rotating shuttle,
- wherein, in the direction where the bobbin thread is stitched, the needle thread surrounds the bobbin thread from downstream to upstream and is twisted to form a ring-shaped stitch.
A stitching method of stitching an object to be stitched using a needle thread wound around a needle thread bobbin provided in a sewing machine or an embroidering machine and a bobbin thread of a bobbin case base installed in a vertically fully rotating shuttle, the method comprising:
- penetrating and capturing a loop of the needle thread prior to the bobbin thread when a needle reciprocating up and down descends and drawing the loop of the needle thread to form a bigger loop of the needle thread;
- turning a feeding thread portion of the needle thread around the bobbin thread and thread-jumping the loop of the needle with respect to the bobbin case base;
- winding the needle thread around the bobbin thread and inserting the needle thread into the bobbin thread by pulling the feeding thread portion of the needle thread upwards in order to decrease the loop of the needle thread;
- and
- further pulling the feeding thread portion of the needle thread upwards such that the bobbin thread and the needle thread are wound and locked near seams of the object to be stitched.
Dependencies are inferred from the claim text.