Knit Stitch Formation

The various steps of the stitch formation for the manufacturing of rib knitted cloth are shown in Picture 29.

The following description refers to the work carried out by a single needle, however, the carriage activates the needles of both needle-beds.

Images Springbeard Needle
Picture 29 - The stitch formation
  1. The needles are in the knock-over position; the loop threads are inside the hook and the latches are closed.
  2. The carriage moves forward and the cam touches the needle butt.

The forward motion of the cam with the tucking cam completely out, forces the needle to move upward; the thread inside the hook opens the latch.

Once the needle has reached the tucking plane, the latch is completely open and the loop is laid on it.

C. The forward motion of the carriage makes the needle move upward again, since the looping cam of the cam is completely out.

The needle reaches the maximum height on the looping plane and the stitch is transferred from the open latch to the needle stem.

This sudden motion can cause a backstroke, that is a reaction of the latch, which could accidentally close with a possible unsuccessful feeding of the new thread and a consequent knock-over failure.

This would lead to the formation of a hole or the starting of a run in the fabric. In order to avoid this, the brushes ensure that the latch opens.

  1. Once the maximum height has been reached, the needle is lowered, driven by the lowering cam; after reaching the tucking plane, the thread guide starts working, feeding the thread; the loop rises slightly on the stem and enters the space between the stem and the open latch.
  2. The needle continues its downward stroke; the loop touches the latch and makes it rotate and close.
  3. The needle reaches the bottom, i.e. the knock-over plane; the previous stitch, after closing completely the latch, knocks over on the new thread, forcing it to take up the typical curvilinear shape.

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