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.
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.
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