| 摘要 |
To provide for accurately timed injection of selected lengths of weft threads to shuttles moving, in sequence, in front of injectors (85, 545), a continuously rotating measuring drum (32) has the weft thread (51, 180) passing in front thereof, the weft thread being clamped against the measuring roller by a pressure roller (35) or a selected one of a plurality of pressure rollers (511), the operating mechanism being coupled to and driven by the main drive (21, 22, 23, 24) of the weaving loom so that exact synchronism of movement of the shuttle in front of the injectors is ensured as the thread is being delivered. Auxiliary functions such as operation of a thread brake (50), a thread retraction mechanism (56), thread cutting by a cutter (99) and the like can, additionally, be controlled from a main drive shaft (34, 54) of the injection apparatus which is in positive geared driving engagement (22; 91-96) with the machine or loom drive shaft (22), or electrically controlled by an electrical control unit (552) which receives drive or shuttle position inputs (554) from the machine drive.
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