| 摘要 |
At least one of the injection ports for injection air currents for folding back an end portion of weft yarn, which is cut after a weft insertion operation is carried out, into a warp yarn opening is opened in at least one of upper and lower sides of a weft yarn path which the weft yarn passes by a beating operation. Air guides projecting toward the warp yarn opening are provided between the parts of the weft yarn path which are in the vicinity of circumferential portions of the injection ports and the same injection ports. The surfaces of the air guides which are on the sides of the injection ports are inclined toward the weft yarn path as the surfaces extend closer to front ends of the air guides. In order to tack in the weft yarn end, the injection air currents are directed to the central portion of the warp yarn opening. This enables the weft yarn end to be transferred reliably, a tack-in operation to be carried out reliably, and the turbulence of the warp yarn to be reduced.
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