Forming process weft yarn

Knitted fabrics are categorized as either weft or warp . Weft fabric is faster and more economical to produce and the process can be accomplished with a single yarn package. The warp knitting process, on the other hand, requires a warp beam, that is, a running sheet of yarns, similarly to weaving. Loops are formed transversely in the weft process and essentially vertically in the warp process (Fig. 1.14). Simplest or plain weft knits tend... 

Rapier looms have an interlocking weft insertion system. The gripper head catches the yarn end from the feed bobbin and transports it through the shed. In the middle of the fabric the yarn is transferred to the opposing second gripper (Fig. 4.22). The weft insertion is controlled at every single moment of the process. Therefore, this principle is very flexible and extremely suitable for delicate materials. Rapiers are available in rigid (Fig. 4.23) and flexible forms. 

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