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Needle threader and usage with a needle. Typical needle threader. A needle threader is a device for helping to put thread through the eye of a needle.Many kinds exist, though a common type combines a short length of fine wire bent into a diamond shape, with one corner held by a piece of tinplate or plastic.
Sewing awls are used to make lock stitches. The needle, with the thread in the eye is pushed through the material. The thread is then pulled through the eye to extend it. As the needle is pushed through the material, the extra thread from the first stitch is then threaded through the loops of successive stitches creating a lock stitch.
Ideally, the lockstitch is formed in the center of the thickness of the material — that is, ideally the upper thread entwines the lower thread in the middle of the material. The thread tension mechanisms, one for the upper thread and one for the lower thread, prevent either thread from pulling the entwine point out of the middle of the material.
The Torrington Company was a firm that developed in Torrington, Connecticut, originally called the Excelsior Needle Company. It was formed in 1866 around the new idea of using a "cold swaging" technique to create better sewing machine needles , as Torrington expanded, it began to produce other goods.
A sewing needle. A sewing needle, used for hand-sewing, is a long slender tool with a pointed tip at one end and a hole (or eye) to hold the sewing thread.The earliest needles were made of bone or wood; modern needles are manufactured from high carbon steel wire and are nickel- or 18K gold-plated for corrosion resistance.
In manufacturing, threading is the process of creating a screw thread.More screw threads are produced each year than any other machine element. [1] There are many methods of generating threads, including subtractive methods (many kinds of thread cutting and grinding, as detailed below); deformative or transformative methods (rolling and forming; molding and casting); additive methods (such as ...
Swaged (or "atraumatic") needles with sutures consist of a pre-packed eyeless needle already attached (by swaging) to a specific length of suture thread. This saves time, and eliminates the most difficult threading of very fine needles and sutures. Two additional benefits are reduced drag and less potential damage to friable tissue during ...
bottom left: a one piece die with top adjusting screw; center: a one piece die with side adjusting screw (barely visible on the full image) right: two dies without integrated adjusting screws; Solid dies cut a nominal thread form and depth, whose accuracy is subject to the precision the die was made with, and the effects of wear.