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A latch needle is a common type of knitting needle used in weft knitting machines. It has several key parts that help it perform the knitting process efficiently. Here are the main parts of a latch needle:

Butt:

The butt is the portion of the needle that interacts with the cam system of the knitting machine. The cams push the butt up and down, controlling the needle’s movement through different stages of knitting.
Stem (Shank):

The stem or shank is the long body of the needle that extends from the butt to the hook. It provides structural support and allows the needle to slide in the machine's needle bed.
Hook:

The hook is the small curved part at the front of the needle that catches the yarn to form stitches. During knitting, the hook moves up and down to engage and release the yarn.
Latch:

The latch is a movable component located near the hook. It acts like a gate that opens and closes over the hook. The latch opens to release old loops and closes to form new loops as the needle moves through its cycle.
Latch Spoon:

The latch spoon is the small rounded end of the latch that helps the latch move smoothly over the yarn as it catches and forms loops. It prevents the yarn from getting caught in the hinge of the latch.
Clearing Ridge:

The clearing ridge is a small ridge on the needle stem that helps control the position of the loop on the needle, ensuring it is properly placed when the latch opens and closes.
Hinge:

The hinge connects the latch to the needle's stem. It allows the latch to pivot and open or close, enabling the needle to perform its loop-forming function.

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