Air-Jet Selvedge Formation and Weft Scissors
topic
Air-jet loom selvedge formation uses leno selvedge yarns on dedicated heddles at both selvedges twisting around each weft end to bind it at the fabric edge, with weft scissors cutting the weft tail at the picking side and an additional tuck-in device optionally folding the receiving side tail into the following shed, with selvedge yarn tensioning and leno heddle timing being critical adjustment parameters that determine selvedge stability and the trimmed edge quality required for downstream processing.
Role
Provides the edge stabilisation required for the cut weft ends of air-jet insertion that must be bound before the shed closes to prevent tail unravelling, with selvedge system reliability being critical at the high pick rates of air-jet weaving where the selvedge must form correctly on every pick at up to 1500 times per minute, requiring precisely maintained leno heddle timing and scissors operation that must remain synchronised with the main loom cycle at all operating speeds.