1972 Volume 18 Issue 3 Pages 86-92
The equation of weft motion on an air jet loom which reserves the measured yarn by an air stream is derived. This and the one reported in the previous paper which treats the measuring drum system are used to evaluate various weaving factors. The results are: (i) From the point of the loom speed obtainable, there is little difference between such air reserving systems as blown on the whole of the measured yarn., or blow n on one leg of the loop or blown on many loops. (ii) Also little difference is shown between the measuring drum system and the air reserving system in point of the yarn velocity. (iii) However, the loom speed can considerably be enhanced if the initial jet velocity is increased, or if the yarn length blown up by air at start is lengthened. (iv) Fine yarn is superior for narrow fabric weaving. Wider weaving may be better for coarse yarn. (v) As the reed space is broadened, the weft consumption rate can be increased. (vi) The following velocities are recommended in case of cotton 20's: 60-70m/sec for the uniform sub-streams added along the shed, 20-30m/sec for yarn-reserving air.
