1. Single rapier loom. During weft insertion with a single rapier, only a long rapier with a width wider than the cloth and its rapier transmission mechanism are installed on one side of the loom, so as to feed the weft into the shed to the other side, or extend the empty rapier into the shuttle to the other side to hold the weft, and then pull the weft into the shed during the withdrawal of the sword to complete weft insertion. When a single rapier loom is introduced, the weft does not undergo the handover process in the center of the shed, so weft handover errors and weft tension peaks caused by the handover process will not occur. The rapier head structure is simple, but the rapier size is large, and the motion is also large. Because of its low speed and large floor area, most of them have been replaced by double rapiers.
2. Double rapier loom. During double rapier weft insertion, rapiers and corresponding rapier transmission mechanisms are installed on both sides of the loom. These two rapiers are called weft sending sword and weft receiving sword respectively. During weft insertion, the weft feeding sword and the weft receiving sword move from both sides of the machine to the center of the shed. The weft is first held by the weft feeding sword and sent to the center of the shed. The two swords meet in the center of the shed, and then the weft feeding sword and the weft receiving sword retreat respectively. In the process of starting to retreat, the weft is transferred from the weft feeding sword to the weft receiving sword, and the weft is pulled through the shed by the weft receiving sword.
