Method of preventing a defective weft yarn from being woven in a

Details Method of preventing a defective weft yarn from being woven in a Method of preventing a defective weft yarn from being woven in a

1983-09-20

1985-12-24

Jaudon, Henry S.

Textiles: weaving

Weft manipulation

Weaving with stationary weft supply

139452, D03D 4730

Patent

active

045599769

ABSTRACT:
In a shuttleless air jet loom, a method for preventing a weft yarn having therein a defective portion, such as a too thin or too thick portion falling outside a predetermined range of limits, from being inserted into the shed and therefore woven in the fabric, is disclosed.
In normal weaving operation, the weft yarn is monitored by a weft yarn sensor which is provided in the path of the weft yarn passage, and the weaving operation of the loom is interrupted when the sensor provides a signal representing a defective portion in the yarn. The yarn thus having the defect is deflected from its normal passage when it is to be picked into the shed. After the defective weft yarn has been disposed of, the loom is reversed to a shed-opening position where restarting of the weaving operation of the loom may be effected smoothly.

REFERENCES:
patent: 3805850 (1974-04-01), Van Duynhoven
patent: 4007457 (1977-02-01), Aeppli
patent: 4448223 (1984-05-01), Deborde
patent: 4463783 (1984-08-01), Suzuki

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